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Old Sun, Apr-08-2018, 08:24:59 PM   #131
mrgizmo04
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Default Re: DIY: E46 M3 (S54) detailed valve adjustment

Quote:
Originally Posted by Exclusivs View Post
Directly in reference to this topic :

YES- Am sure more accurate readings on a compression test are given once valves are in spec. That said, how OFF can test results be prior to doing adjustment.

Also does valve cover gasket need to replace each time? Thanks guys! [emoji144]
Hard to give absolute psi value that might show up on the compression test. Way too many variables, so it could vary from none/0psi if shims are proper sized or undersized, no carbon buildup, valve seats and faces with no/low wear to many psi if valve faces don't properly meet the seats (which might not always be corrected by simply using a proper shim/adjustment).

For valve cover gasket, if you have proper viton gasket, it can be reused, other should probably be replaced as they are more "single use" and might leak if reused.

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'85 528e 164k miles (sold)
'05 M3 6MT coupe

All DIY: VANOS, WPC rod bearings, full SS (SS stepped V1 headers, catted S1, stock S2, SS sport), AFD E85 Proflex kit, Ohlins R&T/Hyperco 375f Swift 672r/GC street tops and camber plates, ST40 355 pfc08, 330 ZHP steering rack, diffsonline 4.1 diff with rem polish, E60 short shifter lever, AKG black diff bushings/subframe bushings, Rogue rtab, Sachs clutch/flywheel, rear main, Beyer driveshaft, valve adjustment, cooling refresh.

Happy to help with VANOS or any other DIY job around NorCal. Have various specialty tools (VANOS, RTAB, engine bar, valve adjustment, tranny jack, ball joint separator, pilot bearing puller, tap&die kit, etc).
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