Bought my MS6 in 2006 with 700mi on it. Now at 127k. TLDR: this is just a thread on me fixing my car. Been around but off the forums for a while now and most here now probably dont know me. Not noob just been away so long going to take a while to remember everything. So posting thread as I will have questions and allow you all to bash me. But mainly want thread as find it is best way track what I have done. Will will try post pics and links as I go to help others. Anyways...my car has been neglected for years now as was always working on ex wife's car. So finally going to take the time to get MS6 back into shape. Car currently runs but not great and being it is now my DD (though WFH so not driving much) I wont be able to address all the issue at once. Car used to drive fine last year so think it is boost leak but could be fuel or spark IDK yet. I know I sound like an idiot but have not done any logs/check anything with DH/AP (yes I have a Dashhawk!). Plan is/was to pull engine to replace clutch and FW. I already bought OEM LUK 10-064 clutch and suspect will go with Fidenza 161071 FW and the dual mass FW is more issue than clutch (can feel it clunking). And DMF 118 DM FW cost 2x as much. I have replaced ~4 MS6 engines and feel this will be easier than pulling trans and allow me to address any other seal issues that need replacing. But for now that is on hold. I will be fixing another car to allow me to have a spare and pull engine in MS6 in the future. Car does not run great: it acts like has a major boost leak but maybe my HPFP went. Im probably only one still running Mrlilguy HPFP and it just may have worn out. Car will accelerate smoothly by barely increasing throttle. No WOT. So first will check for boost leak and suspect will find one. Garage is a mess so have not had a chance to check using compressor but will try tomorrow. The issues started last year on a road trip to PA where car would buck if tried to accelerate and make clicking noise which I thought might be boost solenoid. So I also need to check lines to EBCS/Mac solenoid as maybe it has failed. I did have a bike and 2 kayaks above car so felt any small issues were likely being exacerbated due to added drag. Wasn't trying to go fast but felt like plug gap issues so replace plugs but no change (gaps were fine). Just ended up driving another car for past year. First project involves: Replace belt, tensioner (idler seemed ok so reinstalled (Thread on tensioner/idler pulley/belt parts)). Oil change (17mm drain bolt, 7 quarts with Balance Shaft removed, filter tool) Top off PTO/trans/Tcase as needed (will change fluids when do clutch but worry with all the leaks maybe some low (Amsoil in all but old). Replace inner/outer tie rods (cant get alignment as bolts for tierod seized). Replace front swaybar end links (not doing yet as have done many times and likely need to cut off and ones on there seem fine and think are OEMs and not sure want to use the MOOGs) Boost leak test. Check plugs and ignition coils (just replaced plugs when issues started last year, but forgot to install coil bolts and IDK how car was running but possible fuked up coils since they were literally not in contact with spark plugs). Will stretch clean and spring as maybe issue. (Is MS3 Gen2 different PN? (MS6: L3G218100B9U). replace intake filter (K&N RU-4990) (Not sure what JBR uses as says oil-less but OOS and this one will fit). Fix starter wire again (likely remove TT FMM to gain access as very hard to do from top and then may leave off and replace RMM given it is 10 years old). Compression check. Replace bumper cover clips. Broke bolt trying to replace PS so have to remove... Install new cleaned injectors Clean wheel studs/replace lugs (While taking front PS wheel off a couple of the lugs "cought up" so will have to clean stud threads and use old/get new lugs (Using RAYS 35MM 12X1.50) Once sorted plug in EGR to pass emissions as overdue by 2 years (Already have one not ready code for emissions...that will be another project). Get alignment (Firestone lifetime alignment really pays for itself when own car 10 years however they will not touch my SPC BJs). Replace RMM... Other issues would be normal PCV crap. I always get build up in my OCC lines partly due to winters and water vapor freezing. Will have to pull IM and see. I may try to weld baffle on VC (as gen1) and get the CFM filter. Thread on valve cover breather Video on CFM VCB w/gen2 VC Other thoughts: Suspension issues...rear springs too soft, want to install stiffer rear springs using phate conversion with BC perches. Front koni need help too. (Detroit axle suspension parts mentioned in video maybe?) Rear finder rust. Trunk rust. Clear coat pealing. Fix/finish stereo. Install Aquamist HFS4 and ST intake already bought. l just need to get adapter. More rust proof. I sprayed under carriage if car with LPS3 a few years ago but live in Destin FL and that is why my tie rods sized along with other rust issues. CT roads suck in winter but nothing compared to salt air by living on beach. Replace fuel filter (in tank so IDK when doing this, also maybe replace pump) Install "new" cleaned injectors (Have a spare set still I think). Install upgraded T-case brackets. So far: Drained oil and either find filter tool or buy one... Replaced tensioner with Duralst 305372, reinstalled old idler pully as was fine, May buy a new bearing to replace next time (NTN 6203lax30). Need to install belt (Dayco 5060910). The HF belt tool is a bit too long so wanted to to cut it down a few inches but was able to make it work from the bottom just more of a PITA as if did not hit headlight would have made much easier from top. However new tensioner has a fake bolt that can use vs pulley bolt so we will see. I had already bought Moog tie rods 2 years ago when was unable to get alignment so installing them. Had to cut outers to be able to use tool (very soft steal so easy). Used HF tool w/ 1-7/16 in adapter. The Moog flats did not align with OEM safety washer. Bent oem best could Not sure if you are supposed to install the AM washer and then remove and cut and bend notch into slot like OEM or what as otherwise they are pointless Outer tie rods come with a zerk fitting uninstalled and looks like under BJ has pressed in seal looks almost like like a freeze plug. I think all AM ball joints are this way vs oem being solid. But this has hole which is threaded but sealed. So if want can remove sealant and install zerk. IDK never had these parts last long enough that greasing them would make difference but Ive more replaced control arms than tie rods... Bought 0.051" safety wire to secure boot to rack. By boots are ok so reusing, but they are stiff and make not last long. Have an spare rack that may have boots so going to check if those feel any better before installing outer tie rods. New boot PN for reference is GJ6A3212X if need new ones. Assume can get AM cheaper. video for all front M6 control arms/tie rods/endlinks ect...(same as MS6). So to remove bumper cover braket bolt that sheered I will remove headlights as need another polish. While out I will replace bulbs with Morimoto D2S 6000K Morimoto XB (TSX projectors). Parts bought: Tensioner Duralst 305372 Bumper bracket: Right GJ6A-50-E11C ~$10 dealer Left: GJ6A-50-E12C Also bought both ebay $10 will see if same as OEM (edit they are not buy oem). Moog front suspension/steering parts: Inners (2x): EV800029 (OEM: GJ6E32240) Outer Left: ES800028 (OEM: G26A32290) Right: ES800027 (OEM: G26A32280) Sways Right: K80250 $17 Left: K80251 $17 0.051" safety wire for boots to rack Had to drill out one screw holding center grill 9YA590602A $1.60 Liberty Mazda but ordered with coils $1.19 shipped RAYS W171215B Black (M12 x 1.50 Thread Size) Hex Lock and Nut Set $60 ($76.86-$16 discount as box broke in shipping, AW open box, $95 new) Morimoto D2S 6000K Morimoto XB HID Xenon Bulbs (Pair) $60 K&N RU-4990 3" Air filter $50 4x coils LF2L-18-100A $254 shipped using 20SHIP promo for free shipping (or up to $20 off shipping) Other parts may need: reverse drill bits https://www.harborfreight.com/left-hand-drill-bit-set-13-pc-61686.html extractors OEM coil bolts: 9XF00215X0 Coils L3G218100B9U was using ms6 pn: L3G2-18-100B-9U which go for $90 Just found Gen2 pn LF2L-18-100A which go for $70 Any NATOR CT folks on here?
Got belt on. PITA. Had to remove bolts on PS pump and tilt to get it on. So here is the K&N filter. Pretty close to the JBR. Seems to fit: Polished headlights (hard to see i pics but left is polished) They were not terrible so just used Menzerna P091E w/ orange pad then FF3000 with blue pad. Finished with Meguiars Headlight Protectant. Replaced D2S bulbs. Most may not notice that projectors vibrate as OEM projectors cutoff is non existent. With TSX projector retrofit the vibration at idle is terrible. Another member had said he solved but never said how. I always assumed he just stuck a piece of foam under projector so that is what I did. Used a piece of yoga mat rapped in tinfoil with piece of screen protector glass as worry about temps. We will see how works. This is just to show why to buy OEM bumper brackets. The bumper brackets (oem right) OEM: Ebay: My DS looks like its broken too but hand been holding bumper some how. The PS was not holding bumper at all so that is the only one bought from dealer. But will try the ebay one out on DS to see if works. These are the u-bolts that hold headlight in and this is also the one that the bumper bracket bolts into: I just removed the U-bolt on PS that had bolt seized and as I cannot find OEM PN so using a generic M6-1.0 u bolt: Still have to fix PS headlight bracket that broke DS: PS: Going to have to plasticweld nut just not sure what type plastic headlight housing is... The moog front stabilizer end links returning Rethreaded/cleaned threads on wheel studs. If you do not own a rethred kit get one. Use it all the time
If your bumper won't stay flush, a standard quik-latch.com QL-25 mini works. There is a how to on it too.
We will see if bumper ever goes back on... OMG long post....TLDR bad compression on #4. Ring stuck or its cracked and engine fucked... So compression test was not good. First cylinder tested was #4 and only went to 150. Using solid pipe with gage, not a hose. But still maybe gage was off... so did rest. Close to 180s on #1-#3. Went back to #4 and was like 50 or less idk was low AF. Thought maybe not sealing in plug hole but got pretty frustrated as figured engine fuked so got prices on new engine cause cheaper than a new car...but $4k into this car just hard to make sense even with car market. Talking to my Nator CT group and mentioned maybe try ATF to see if ring stuck being. How compression dropped to under 50 after getting 150 first time it is weird... Saw this thread https://mazdaspeeds.org/index.php?threads/low-compression-help-and-possible-fix-acdelco-x66p.7695/ Now maybe its fucked but maybe its just stuck ring so why not try...maybe a valve but doubt it....but idk as didn't try more diagnostics. I think this could be possible because...well I drive it slow because not tuned. Figured no WOT should be ok until get tuned. This went on for 10 years...I only did MAF cal for intake and got things good and then never had time to do more. Yes idiot but figured drive slow keep in "passive" mode be ok and was for many years...just figure best to be honest and ready to be bashed...I can swap engines...I do not know how to tune and barely know how to do a log. Had always planned to bring car to someone to do it but life got in way... Anyways will do more diagnostics like leak down but said fuk it and decided to soak pistons in B12. Sort of wanted to drain oil as new but whatever. Just decided to pour it in. And didn't just drain right past piston. After 6hr it is empty so added more to #4. Added a little to all cylinders but filled #4 to spark plug. Piston was above middle stroke. Probably less than 8oz filled it. Anyways all cylinder drained but only a few oz in #1-#3 just to cover pistons. So ya just dded more to #4 and will keep adding to try for 24hr soak. I've read about using MMO, ATF, ATF mixed with acetone and other stuff but b12 was best when I cleaned valves on other ms6/3/cx7 engines and at $3/bottle its cheap. Also read about running engine with B12 in oil so figure stuff that leaks into oil will be ok to run engine with it in oil breifly then will drain and flush. Also read about using compressed air to force thru piston rings...but going to take one step at a time and check compression as I go to see if anything changes. If it is stuck rings may need to get hot to fix. Will put #4 at TDC on compression stroke and do leak down test if comoression test dont change to see where air coming from and maybe pull IM if seems like intake valve issue..pulling turbo mani obviously PITA. I will probably pull engine if things don't get better but idk how to rebuild engine. Most I've done is swap heads (on b7 a4 audi) and before that just full long block swaps. Side note: Every ms6 engine I've done leak down test on has failed (but they were not in car) Brand new engines...so I posted long ago about is it that vvt goes to full retard rather than 0°. Was told goes to 0° so leak down should have worked but never did. Idk maybe was doing wrong but i know I wasn't. And engines ended up perfectl compreassion when installed. So I've always been weary of leak down test. Now this engine is installed so different but still may just rely on blowing air into cylinder thru spark plug hole and see where leaking vs actual reading on leak down.
A good way to rule out valve partial open (vvt) resulting in low compression. Check valve lash. Great thing is verification of good lash means if you continue and do pull engine/head as you sadly find more wrong. Not a wasted step. Since once pulling apart the valve buckets are if needed for replacement because of loose / tight clearances..one step done.
Well that is the last thing want to deal with right now TBH. After B12 and ATF soak still 50PSI. Then tried blowing 40psi air into cylinder at TDC (tried both TDC as idk if on compression stroke) but with neighbor mowing lawn can't hear or see using lighter flame if intake or exhaust valve leaking or if coming pair coming out oil dipstick/fill. Going to try again at 80psi. But thinking I should pull IM. As well as being able to see intake valves maybe its injector seal issue...I mean im grasping at straws at this point but be silly not to check injector.
Nope you cannot check leakdown on this engine. This is what I concluded 10 years ago and after trying many things same conclusion. The VVT overlap must not be 0 at rest. Even at the 30°? Max retard idk if this makes sense. But every engine, new/old I've tried this on end up with same issues. At TDC on #4 I send air into cylinder and get air out #2 and #3 spark plug. Rotate forward until no air out of #123 spark and get air out of exhaust. Can't be done. Checked for air out of oil cap and coolant but nothing and no point as all valves never fully seal on an engine with timing chain installed as far as I can tell. No one has ever agreed with me on this but that is always what I find. None of this explains low compression so still feel I have issue...but I cannot confirm rings/piston unless pull cams...so either button it up and run or pull IM. I am pretty sure injector seals fine. Pulling IM will allow me to look at intake valves and fix starter wire. But think going to run it first...so that is plan.
Started up and running fine at idle. Sounded good. Rattle gone from tensioner that started this whole thing. As writing this came up to temp and started to sound boggy. So now when hit gas just bogs. Won't increase in rpm. Like fuel issue. Car ran ok before. Now its worse. Restarted same issue. Weird. Vid from before started to bog. Sounds fine to me. Have to continue tomorrow... Edit now fine but too late to be revving engine. Car sounds good though. Maybe the atf and b12 messed with O2? Reading too rich or something. Ok so assuming engine runs fine, think ok to drive with ~20oz B12 and ~4oz ATF in oil? Like to costco and back (30mi). That way maybe help free ring if stuck but wont further damage engine? I mean engine may be fuked but if not don't want to damage. I think be ok as plan to go slow then slowly work to higher and higher revs but always low load. Otherwise I can just rev on jackstands but feel zero load wont do much. I bet I have a cracked ring. So im likely pulling engine. Think will try to rebuild just need to find way to not spend $4k doing it. Added video of reving in neutral. Not of much use but at least its running. Whatever caused the issue where was bogging when hitting gas seems to be resolved. Still get a slight hesitation from idle, hard to see in vid. Could be fuel, trims, still some b12 messing with 02 along with just resetting ECU or could be the #4 cylinder idk. May take a compression reading and then either soak again or button up and drive for a bit....
Well got nearly 180psi on #4 now. This is after revving engine other day (nothing more). Got sick past 3 days so just now got to retest. Was going to try driving under load a few miles of still got 50 but seems good. Should drive better now. Did put new coils on but assume wasn't really issue. Idk if was gauge or what but tested many times and same results except that first 150psi so can only think was stuck rings and b12/ATF helped loosen. But I still got 50 other day before reved way up with the b12 in oil. Only other difference is all plugs but #4 in but tried with #2 and #3 in and still got 50 and that should not matter. Time to put back together.
Took off TB to access starter solenoid wire that is again causing me issues: Removed white plastic cover and cleaned wire connector, pin on solenoid and cover best could. Tried to tighten prongs on connector but hard to get hands down there... Applied Gardner Bender Ox Gard which is conductive grease so should insulted from corrosion and provide good connection. It is not going to fall off but just not as tight as hoped and sick of fixing this so installed some zip ties to keep it in place: Fixed headlight bracket broke when removing bolt securing headlight to top radiator support. What is should look like The headlight housings seem to be made of a fiber reinforced plastic so knowing what type plastic to weld with wasnt really option. Using HF fiberflex welding rod/ribbon and a flat piece broke off back of headlight that didn't seam to serve much purpose to create a new bracket. Installed m6 nut and washer and should be good. Time to buy more fiberflex as comes in handy. Too bad HF doesn't sell seperately as theirs is nearly as good as Polyvance. Cut new larger peices of foam so no way can move, covered in tinfoil and placed under projectors. Hopefully dont melt...
I dont think the projectors connectors get that hot, my drivers side had foam under it (no tin foil) with no issues when I bought it, but I was able to fab a repair piece for the adjuster mechanism.
Just drove car 30mi and drives much better. Back on ramps Going to drain oil, fill with Kirkland 5w30 and drive for 100mi-1000mi? Before doing another oil change back to rotella T6. Should clear the B12/ATF. Ya I dont think they will. When building my fog projectors had to use very small projectors and did get hot but likely was also because was using cheap 55w ballasts. Now using 35w F3 Fast Bright ballasts and dont think get so hot. And headlights are much larger and using oem ballasts just really had no idea if get hot. My adjusters work fine and next step will be to aim headlights. Reason for foam is there is upwards play in adjusters and when engine vibrates at idle you could see DS projector wobble from cutoff. Not really noticeable with OEM projectors given they dont have a sharp cutoff. Along with if have balance shaft installed engine vibs are much less. My PS fog projectors has water in it: which likely why bulb blew though I did have bumper sitting outside in rain so not sure how much if any got in before but feel likely did get moisture looking at bulb (left): So removing bumper and will blow a fan at fog as fairly dry out hopefully clears. If not will try hot air and desiccant pack. Tried last night by putting inside with dehumidifier but did not blow fan at it so didnt work. Had to install bumper to drop kids off. Moisture is clearing from fan and use hot air to make sure. Issue now is to keep it out. The D2S adapters are actually off OEM low beam projectors. Thread when made these: https://www.mazda6club.com/threads/d2s-projectors-in-fogs.223474/ Now super corroded: DS with bulb installed: I don't have a dremel wire wheel to clean but not sure would matter in terms of water proofing...6mo living beachside in Destin FL did more damage to car than 10 years of CT winters. Was able to clear moisture with fan and hot air. Could not find silicone so used gasket maker to seal bulbs to housings: Plan to spray with lps3 or plastidip too. Bumper also not clicking into new PS bracket so going to try to adjust it. Also picking up an OEM DS bracket as it is missing a clip and the ebay ones are crap.
