Re: NC wayne

Posted by NC Wayne on January 24, 2007 at 18:50:52 from (152.163.100.74):

In Reply to: NC wayne posted by JoeBob/IN on January 24, 2007 at 13:25:13:

I'll check the book tomorrow and make sure but the milled flat spot you were talking about is where I thought the numbers were on the V engines. I know the numbers on the block aren't gonna be it, typically their just casting numbers and sometimes the part number for the block itself. Check the other side for a spot just like the one on the right and both sides toward the middle of the block toward the front. I swear I don't remember them being toward the back end of the engine anywhere but... If you are able to find any stamped numbers it should be a sequence starting with prefiz of 8VF if it's a 92 series or 8VA if it's a 71 series. That will be followed by a followed series of, typically, 4 to 6 numbers which is the actual, numerical, serial number for that engine.
As for the smoke the Detroits don't use a "normal" head gasket like most engines you think about. They use an individual, circular crush gasket (fire ring) around the top of each cylinder and then use a square cut, rubber like rings to seal the water and oil passages, with all that followed up by another rubber like ring all the way around the outside of the head to seal oil draining back from the head into the cam vallies. That said a blown head gasket, like your thinking about it, shouldn't be causing the problem your seeing. Are you seeing that much oil smoke or oil slobbering out of the airbox drain tubes? Typically if the compression rings are worn out the oil control rings are too, in fact the oil control rings usually go first in my experience. Still from what your saying it leads me to believe it is a problem of low compression but wether it's from worn out or stuck rings or possibly a burnt valve or two it's hard to say. I know I had a customers 6V71 several years back that ran OK but smoked so bad on the left bank you'd have thought it was on fire. Turned out to be one burnt valve (out of 4) on one cylinder. It's hard to believe how much smoke can come from the fuel put in by one injector. If it's putting out as much raw fuel as your saying you can probably pull the exhaust manifold and look at the exhaust passages coming out of the head. Usually if one is that bad the passage will be washed or sometimes even still coated with raw fuel instead of soot like the rest of them. Doing that won't fix the problem by any means but it'll give you an idea of which cylinder(s) is bad. I'll check tomorrow on the correct location of the serial numbwer, since it seems my memory has failed me, and let you know tomorrow evening.

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