leaky #6 exhaust valve

[DRO]

Well... been working on "wringing out" my car (a la spring cleaning, etc.) and came across a bad exhaust valve for cylinder #6.

Compression test for cyl. #1-5 = 150 psi. Cyl #6 = 100 psi.
Wet compression test still @ 100 psi.
Cylinder leak test showed ~ 40% leakage from exhaust valve.

Looks like I've got more work ahead of me than expected. Hopefully I can get things put together in time for this new race series I'm hearing about in January.

 

[Russ Merritt]

Fill #6 with air, I know it's a biotch to get to. Take off the valve cover and tap on the end of the valve with a rubber hammer. It might be carbon on the seat, and the valve spring isn't strong enough to close it all the way.

 

[DRO]

drum roll please...

Thanks for the (valve) tip!

 

[Russ Merritt]

I take it that it worked? Been there before, on a friends car, 2 cylinders down on compression. Air coming out of turbine housing, tapped on the valve tip and it sealed up! I finished putting on the valve springs, took her out a really cleaned her