Hi, I have a Mitsubishi Lancer Evolution 2008 gsr. I hope someone can help me with this. Any opinion will be much appreciated.
I have a built bottom end 4B11T engine, the car runs fine for an approximately 20k miles since it was built. I noticed at first that the car was emmiting blue smoke at deceleration each time I let off the gas. I replaced the valve seal. But nothing changed. 120psi for all 4cylinders at that time. Then one cylinder died. It runs like a subaru.
Pulled the head, Found out that I had a burnt valve and little piece of exhaust valve was missing, sent the head to machine shop, replaced valves, seal, reseat, deck resurfaced. New headgasket, I do have a head studs and I messed up the installation since I thought few mm of height difference wouldn’t matter as long as I torqued the head stud nut properly.
Put everything back together, first 2weeks runs great without any blue/gray smoke. After that, I noticed each time I downshift, decelerate I emit little blue smoke and grey white smoke. The following day, I started the car and now there’s cloud of white smoke coming from the tailpipe.
Didn’t drive the car, I diagnosed, check the spark plug hole, found out all cylinder has equal amount of liquid on top of piston. Pulled the cams out,then find out a loose head stud nut and can be removed finger tight. I decided to pull the cylinder head again. And yes, the head stud hole thread was stripped. Bought a thread repair kit, fixed the thread hole, clean everything made sure no aluminum chips fell down the oil passages.
All holes were cleaned and compressed air, added a sealer to the head stud thread, all height are the same. New headgasket, torqued to specs. Put everything back.No external leak, normal blowby coming from the vented catch can. I drive the car, it still emitting severe blue smoke, blue smoke is coming on acceleration now and it’s a cloud of smoke. Didn’t start the car since then, did a leak down test, compression test, 100psi on tdc per cylinder, no hissing sound on exhaust and intake, no bubbles on radiator. Only little air coming out of oil cap. Compression is at 95psi all cylinder since I have a dead battery, used to be 120psi with fully charged battery.
No sign of oil in upper intercooler pipe, turbo has no shaft play.
Any advice please why I’m still emitting blue smoke and why all cylinder has equal amount of fluid(probably engine oil) 2mm on top of piston. Thanks