Hit the juice yesterday and a whiteish cloud of smoke came out of my exaust, my car was running on 3 cyl. I had a flashing check engine, took out the plugs, my 3rd cyl. plug was black and had the tip blown off, the 3rd cyl. reads 0 psi on the compresson test, when you put psi in the 3rd cyl. air leaks out of the 1st cyl. Blown valve(s)? blown rings?

 

I'm soooo sorry. Sounds like more than a bent valve though. Good luck on the rebuild.


Modified by Pioneer162 at 10:04 AM 8/15/2005

 

burned valve

 

Im gunna rip the head off to nite and check everything out. Im thinking its a valve

 

so where did you hear the leaks when you did the leakdown test? intake manifold or out the exhaust manifold?

 

When I did the leakdown I did it on the 3rd cyl. and air came out of the 1st cyl. I dont really understand how that happens

 

The crankshaft is designed so that the pistons in cylinders 1 and 3 move in sync. So when 1&3 are decompressed, pistons 2&4 are compressing. Most likely when you did a leak down you had the pistons decompressed which allows air from on cylinder to enter the camber of the other cylinder housing

 

ouch.