Bob,
I had a similar problem with very high oil consumption in my '74 GT several
years ago; the engine never made smoke, and also never leaked a drop on the
driveway. I replaced my engine with one that had been professionally rebuilt.
During a lull in restoration activities, I tore down the old engine and was able
to confirm that the problem was worn, stuck and totally "crapped up" piston
rings. I was combusting my engine oil at the rate of about 1 quart/500 miles. I
think the rule of thumb is "if you see smoke, the problem is in the valve
guides, but where there is no smoke, the fault lies in the rings".
Jim
alaskabob2 wrote:
> Well here is the latest on my vibration problem....
> thanks to those who took the time to reply with suggestions.
> I pulled the engine on Sunday,(put it in & got it running sun too) to fix a
> oil leak. The clutch plate was soaked with oil & slipping too.
> I found that whom ever rebuilt this engine didn't put a gasket in between
> the end pate & the engine block. They only used goop. I figured by the time
> the goop started wearing thin the two metal parts were touching, causing the
> deafening vibration. also the pilot bearing fell out it was so loose. so I
> put a new clutch in.(actually one from another engine I have). replaced the
> crank seal,(I thought that was where the leak was), and I noticed the bottom
> crank seal was half gone. I didn't expect this so I was missing a lot of
> parts I should have replaced while I was in there.I used red high temp goop
> to fill in the other half of the seal.coated both sides of the end plate
> gasket & put it in, pressed in the pilot bearing,(should have replaced it
> but didn't), coated it with lithium grease,(put the crystals in the gas
> tank).
> put it all back together. Now the only vibration I get is between 3000 &
> 3200 RPM. (It used to be from 3000 to 4000 .) & it seem to be normal MG
> noise, not deafening. No more leaks !!
> HOWEVER - I'm still loosing a lot of oil. could it possibly be burning a
> quart a day. doesn't seem to be smoking. could it be valve guides ?????
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