After a complete overhaul, and two rear main seal jobs, the nailhead is still squirt'n oil!
is there anyone who wants to sell an 425 nailhead with heads?
Or know a company which sells rebuilt nailheads?

Thanks!

I still have this one:

http://forums.aaca.org/ubbthreads.php/topics/512368/F_S_401_and_425_in_Eastern_PA_#Post512368

John

I just this AM talked to Richard of Performance Auto Supply in Marysville, CA. He thinks that he has a 425. His phone number is: (530) 743-9211 or email: performance97@sbcglobal.net

Roy,
I would do some more diagnosis before I swapped in another engine, especially after you had this one overhauled. If the leak is from the rear of the engine and 2 new rear main seals haven't fixed it, you may have a leak at the cam plug, which is directly above the rear main seal area. Your term "squirtin'" make me think this could be the source of the leak, as a rear main seal would usually drip, where a cam plug could leak a lot of oil out because pressuried oil can get into the space behind the cam plug. Leak detection dye for engine oil is available in the US and most likely in Europe too. Might be worth checking into the source of the leak before getting a new engine.
Take Care,
Tim

Thank You! I will check if it might be the cam plug. I also had the crank balanced and polished, but it still shakes a little.. Can it be caused by the converter? Or flywheel?

I will send Richard an email anyway..

If the flywheel/ring gear was not put on the right way it will cause a nasty vibration.

How can I be 100% sure it's put on the right way? I'm close to a 100%....But the vibrations got me thinking that I might have done something wrong..

Roy,

First a question for you, then an answer to your quesiton. 1) When you had your crankshaft balanced, did the engine builder know that the Buick is an externally balanced engine? The crank has to be balanced with the harmonic balancer AND the flexplate correctly installed. (see 2 below) If the crank was balanced without the harmonic balancer and flex plate (correctly installed) and you then add these items, you've thrown the engine out of balance.

2) The flexplate has an oddly placed 7th hole in it. It's on the same circle as the other crank bolt holes but you can tell which one it is, it's not evenly spaced as are the other 6. That odd hole has to be matched up to a dimple on the snout of the crank. By doing this, the flex plate is alwasy installed in the same place and the external balancing of the engine is not compromised.

Ed

ooops! I guess he didn't do the balancing with the flexplate and the harmonic balancer installed... I think he blasted and painted them, and left them untouched until reassembling the engine! Sh**
I actually knew that the engine is externally balanced, but I was stupid enough to forget to ask if he knew! Probably not.. Will ask him this week!
Thanks for your help!