SCH, Car idles fine, bent valves?

[iDriftYou]

So I recently spun my CH, got the car towed to a shop to get the upgrade done, the car started and idled fine, not even a rough idle, but I got a call today saying that cylinder 2, 4 and 6 all have 80% leak in compression after they did a leak down test. I was under the impression that if the hub spins but the car idles fine, odds are your valves were untouched. Anyone run into this scenario here? Just want to be sure before I drop the money for a valve job.

Thanks

[FriedPiston]

This hasn't happened to me due to SCH, but your engine should continue to drive fine even if it fails a leak down test at >80%. I've been running on 2 cylinders with a 90% leak down failure in Cyl 1, 3, 5, 6 but the car still pulls hard at 20 psi boost on E85.

The turbos will work a little harder (high WGDC) until you get the cylinder head serviced. But to answer your question, results will always vary when it comes to the extent of damage with SCH.

[iDriftYou]

Originally Posted by FriedPiston

This hasn't happened to me due to SCH, but your engine should continue to drive fine even if it fails a leak down test at >80%. I've been running on 2 cylinders with a 90% leak down failure in Cyl 1, 3, 5, 6 but the car still pulls hard at 20 psi boost on E85.

The turbos will work a little harder (high WGDC) until you get the cylinder head serviced. But to answer your question, results will always vary when it comes to the extent of damage with SCH.

Thanks for the info, I didn't drive the car hard after the DTM came on, my buddy spun his on a money shift, his car would not start at all but his valves were untouched.