Thread: Engine experts........need your help again !

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Well, it looks like our little repair didn't hold. Last night Dan and I took our cars for about a 100 mile ride and his car burned a quart of oil. We decided it is time to correct the problem once and for all, so today we removed his intake and both heads to see what is going on. Here is what we found:

1) Jerry and some of the others weres right about the valve guides. We removed the springs from a few of them and all of the bare valves wiggle slightly in their bores........the guides are worn. I think the radical cam he is running may have shortened their life, or they were not done properly to begin with.

2) The intake gaskets are still not holding a good seal. It seems the heads have been milled so that the intake is not dropping far enough into the valley to seal well. Don has a set of C heads he was saving and has graciously offered them to Dan to use. We are going to have them totally gone through, SS valves, new guides, postive seal valve seals, 3 angle valve job, etc. Then we will see how the bare intake lays on the heads and use Richards clay method to see if they match better than the heads now on the car.

3) We also found a real shocker. The second cylinder back on the passenger side is badly scored. It is right at the bottom of the cylinder wall, is about an inch wide, and pretty deep. It looks like some of the carbon that is all over the valves, from the over oiling situation, broke off and as the piston traveled up and down it scored the wall. We have a bunch of money in the block so Monday I am going to call the local machine shop and see if that cylinder can be sleeved. The engine is already bored 40 over, so we don't want to go any further. If need be, we will buy one new piston, if the one in there looks damaged when we get it out.

What do you guys think about bronze vs metal guides? His cam has a fair amount of lift, and I understand bronze holds up better under that circumstance. How about those positive seals that you have to machine the heads to use, any good?

This is not going to be fun because the body has to come off to get the engine out of this car, but we have already done that to fix the transmission a couple months ago. We are going to make sure every component is perfect this time before the engine goes back in, don't want to be doing this too often.

Don