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Super Moderator
Join Date: Feb 2000
Location: Naperville, IL USA
Posts: 14,983
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996 GT3 - Equal leakdown out of both exhaust valves?
Okay I'm stumped....
Getting low compression (obviously) and high leakdown out of my Cup engine. It's coming out of the exhaust.
Whats weird - is that it's coming out of both exhaust valves at the same time. As if the cam wasn't closing them properly. It's only on one cylinder. Why would both valves do this? They don't share a lifter, spring, etc...
Baffled.
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Chris
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1996 993 RS Replica
2023 KTM 890 Adventure R
1971 Norton 750 Commando
Alcon Brake Kits
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