This weekend I worked on engine to prepare order for engine parts.
Engine suffered from a old power steering fluid leak, so I decided to clean it and probably reallocate PS tank somewhere. Or at least replace some seals to stop the leakÖ
Also crankcase vent hoses become hard as plastic and all connections were leaky and dirty.
As the result I washed it three or four times every time removing more and more bits that were not allowing to clean it better.. Many cans of engine cleaner later, kind of semi-finished result:
later I removed timing bits and coolant tubes over cyl 2 ad 4 and cleaned it once again
Timing belt was off on all cams except for RH intake (1 and 3). Hereís pic of LH cams with crank marks alligned:
I wonder if this could be a cause of poor performance comparing to my other car.
most of the pulleys are toast, so gonna replace them and timing belt
Initially It wasnít planned but I think itís worth it. Oil pressure was solid and seal looks clean, so pump will stay on..
Water pumpÖ Probably good idea to replace it because that looks scary:
Any idea is there a way to clean the block inside? I rinsed it with water, but maybe thereís some trick or solution for this specific job?
Another surprise was the turbo. While removing I found it hard to remove one nut right under the center section, so I decided to take the turbo out from hot housing to reach it. Result:
I didnít broke it, it just fell apart.. crack is quite old and looks like it wasnít leaking. Anyway, I didnít planned to use it. Despite this turbo looks fine btw, no play or leaksÖ
By the way, is there a flex section in stock uppipe? Turbo mount flange is kind of loose on mine and it feels like joint is somewhere under the heat shield, canít see. Wonder if it leaks..
Also question, does it makes sense in keeping stock heat shields? Mine are kind of reusable but they weight a lot.. I wonder if wrap works better or not?
Finally after final stage of cleaning I managed to pull out valve cover from LH side (2+4).
Itís for sure STi, not HLA heads.
Shims are 9.65 mm (? my caliper is crap) diameter with 6mm hole on the other side and have numbers on them written by hand.
Buckets are 30 mm diameter. This one seems to have worst wear although sits a bit tighter than others.
Are these (buckets+shims) similar to V3-4 and later bits? because I never seen them but by part numbers V1-2 STi shim setup looks different and unique although similar by design.
Cam journals are fine for me, which sounds funny because I never did anything like this before
I just never heard of anyone doing any polish/repair stuff on these, so I will just try to put it back together as clean as possible to not to cause more damage.
Exhaust cam, worst bearing:
respective cam journal
Intake cam caps, cam looks mint.
Still need to measure the other head and order correct shims plus some other stuff to put it together.
Before final assembly would it be good idea to turn engine on stand till head will face downwards and spray it with some intake cleaner stuff? I will lube everything with fresh oil during assembly anyway and I wanted to get rid of any dust or stuff that may got there since I have to work outsideÖ It wasnít windy or anything yesterday and itís not F1 engine but itís not the best condition to work on engine and I donít want to harm it in any way...
There was some silicone inside including in some threadsÖ I will try to do this job better when I will put it together. Is there a simple way to clean old silicone out of threads?
Also if anyone has advice on valvetrain setup or coolant passages cleaning on assembled engine tricks or exhaust stuff that I questioned about, please share!
Thanks for reading!