OIl burning question

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Aug 29, 2005 | 01:42 PM

tastyklair

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From: Eastern Pa

OIl burning question

Still trying to nail down this burning oil problem. Then I read the very beginning of Steve Christs book and he mentioned something I had never heard of but I'm always looking to learn. He states that if the crank/rod clearances are too large it will sling oil to the cylinder walls so much so that the oil rings can't handle it all and as a result you burn oil. I know that in addition to the fact that there is a very fine line in the #4 cylinder wall, the clearances on the crank were definitely large. I guess my question is that if i am experiencing some of this slinging would it only get thrown to one side of the engine? And if that is so could it conceivably only go to the cylinder nearest a journal with the largest clearance?

Aug 29, 2005 | 01:49 PM

bertha66

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From: Central Oregon

I do not know what you have looked at with you oil problem, but if you are having a problem with oil usage, have you checked the valve seals?

Aug 29, 2005 | 02:16 PM

tastyklair

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From: Eastern Pa

Been through all that including replacing the intake gasket with and without end seals. Only burns on drivers side and mostly #4 cylinder. Some think it is the small line in the cylinder wall which it well may be, but before I tear into it I wanted to chase down this as well so if the crank could be part of the problem I'll get it done all at once. Engine only has about 3000 miles on it.

Aug 30, 2005 | 12:55 PM

fordfury469

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From: Idaho cda postfalls

the #4 hole is on the passenger side of the engine are you talking about the number eight hole on the very back of the driverside of the engine. how much oil is it burning my 390 burns about a quart a day but the number5 hole is bored to big for the rings and they never seated. does it burn more oil going down hill and then when you get on it it blows smoke everywhere.

Aug 30, 2005 | 01:18 PM

tastyklair

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From: Eastern Pa

Oops,

it is the # 8 cylinder. Yes it is worse when decellerating then when you jump on it pours out. It does smoke at idle also though, not a ton but is is discernable. But I'm still wondering if anyone has any experience with this too large clearance issue?

Aug 30, 2005 | 01:57 PM

fordfury469

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From: Idaho cda postfalls

ive never heard of that before about the bearing clearances being of that it throws oil onto the clyinder wall. but sounds like your getting blow by of your oil ring. also you valve seals might be toast to but mostly sounds like rings.

Aug 30, 2005 | 02:47 PM

rusty70f100

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From: Iowa

What weight oil are you running? Switching to a heavier oil will slow it down.

Big string of questions:
Did you have new valve guides put in? Did you use new valves? If not, did you check the wear on the old valves? Did you have the crank ground, or just put new bearings in? Did you check rod side clearance? Are you running a windage tray? That might compensate somewhat.