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WydRyd WydRyd is offline
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If you suspect any internal engine wear, you should do a compression test first to identify any suspect cylinder which has a large difference in compression to the other cylinders. If there is one, then you do a leakdown test on that cylinder to ascertain whether it's leaking out the rings or valve(s).

My understanding is that if air is leaking back out through the intake, it's intake valve, if it's leaking out the exhaust, it's exhaust valve and if it's leaking back out through oil filler, then it's piston rings.

Maybe some of the more experienced would chime in to verify this
'89 911 Turbo Cab
Protomotive MAP ECU, Twin Plugged Heads, GT2-EVO CAMs, 3.3L fully finned P&C's, ARP fasteners, C2T head gaskets, Titanium Retainers, Turbo spec valves, springs & guides, 964 splash valves, GT35R BB turbo, GSF Stainless Headers, Magnaflow Exhaust, Full bay Intercooler, TiAL 46mm w/gate, TiAL 50mm BOV, Apexi AVC-R EBC, SPEC Stage3+ Clutch kit, Crane CDI Ignition
Old 02-09-2007, 12:55 PM
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