Originally Posted by Roushturboedzx3
Prob broken ring lands or leaking valves.
Don't leaking valves only cause air to escape through the intake? There's no way it could pressurize the block, right?
valve cover was off. i have read that sometimes a cracked or warped cylinder head or blown gasket can cause air to exit an ajacent cylinder. I need to redo the test and tap the buckets on cyl 3 to see if the valves snap shut. may also pull the cams.
We are really hoping its in the top end, we don't want to get into a full rebuild.
as a side note, we did the same leakdown test under the same circumstances a few months prior, and we had ALOT of air leaking from valvecover. like over 20% on 2 different cylinders. we were surprised that we didn't get anywhere near the same results. we'll do it a third time and check back.
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