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Classic Mustangs Tech Forum

Technical discussions specific to 1964-1967, 1968-1970, and 1971-1973 Classic Mustang. Discuss all tech related to in-line six cylinder and V8 powered Vintage Mustangs here.

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Unread 08-06-2010   #16 (permalink)
blastfurnace is offline Rookie

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Quote:
Originally Posted by Pig Muffin View Post
or his whole bellhousing is filled up do to a rear main seal.
How can I determine if this might be an issue?
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Unread 08-06-2010   #17 (permalink)
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Quote:
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How can I determine if this might be an issue?
You would see copious amounts of oil around where the trans and motor meet up. But 4 quarts would most likely leave a puddle you would see.
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Unread 08-06-2010   #18 (permalink)
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Unless you (or someone else) caulked the mating surfaces and the inspection cover AND it all held oil tight AND the rear seal was leaking - it's not possible. Pig's pulling your leg. I have, however, heard of old 8N tractors geting the weep hole in the bottom of the case pugged up and accumulating quite a bit of oil that the rear seal leaked so the concept is real just not at all likely.
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Unread 08-06-2010   #19 (permalink)
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What is "normal" oil consumption is always a hot topic of debate...some would say over a qt every 1000 miles is "too much", some would say "normal"...
4 quarts in 2000 miles would probably be excessive in most peoples book...I'd watch it more carefully and not panic...
My Infiniti uses a quart about every 750 miles...they have lightweight racing pistons and are know to use oil, ...my Cobra uses almost no oil.
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Unread 08-06-2010   #20 (permalink)
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It is not uncommon for a rebuilt engine to go through a couple of quarts of oil per 1000 miles. If chrome rings were used then they might not have sealed. Burning one quart of oil every 500 miles will not be decidedly noticeable. After 2000 miles it may be fine now. Check the engines condition with a leak-down test but I doubt you will find anything wrong. Change the oil and filter, as you should have after the first 1000 miles, and then monitor the oil at 500 mile intervals to see if you are still losing oil. While checking your oil watch for obvious leaks at the filter, drain plug and rear of the pan. Some leaks only happen while the engine is running so if you had a minor leak it may not have shown up on the floor of your garage. It might be spread out over miles of road that you drive.
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Unread 08-06-2010   #21 (permalink)
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He said that it smokes for about 5 min. when he first starts it. That is usually an indication oil is leaking down past the valve guides while the engine is off. 4 qts in 2000 miles would be a lot of leak, but on a fresh re-build I wouldn't be happy with poorly sealed valve guides, even if it only accounted for a little of the oil loss.
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Unread 08-08-2010   #22 (permalink)
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Quote:
Originally Posted by blastfurnace View Post
.....there was the tiniest bit at the very end of the dipstick. After I put in the 4 quarts it read as just slightly below “full”......
4 qts between 'tiniest bit at the very end of the dipstick, and 'just slightly below full' does not sound right.

I would drain the oil, replace the filter, then add whatever the manual states then recheck the level on the dipstick.
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Unread 08-08-2010   #23 (permalink)
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I think we are being messed with here.
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Comp Cams Magnum Lifters and Pushrods Comp Cams 1.6 Full Roller Rockers
Edelbrock RPM heads (2.02 / 1.60) / RPM Air Gap
Holley Street Avenger 670 carb
Edelbrock 110gph Fuel Pump
Cloyes Street True Roller Timing Chain / Professional Products Harmonic Balancer
MSD Pro billet Dizzy, 6AL Box, Blaster 2 Coil
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