[DeTomaso] 10 qt Oil Pan-long

[Michael Shortt]

Man, there just isn't anything freaking normal on our cars at all!

Michael Shortt


On 2/1/07, JDeRyke at aol.com <JDeRyke at aol.com> wrote:
>
> What I think I know: when Boss engines came out in the very late '60s,
> Ford
> found that with the rpm capabilities from mechanical cams, oil didn't
> drain
> back fast enough into the pans through the two tiny return ports in each
> Cleveland head, holding much of the oil up top and running the pan
> momentarily dry.
> MIke Cook once mentioned that some 3-1/2 qts of oil might be up top at
> high
> rpms, leaving only 1-1/2 qts in the pan for the crank. So the typical
> factory
> response- don't-spend-any-real-money-to-fix-it was to recommend
> overfilling the
> std pan by a quart- thus a stock '5-quart' pan got 6 qts, and rod throwing
> lessened. Note there are three different possible "stock" Ford pans for a
> 351C, all
> holding the exact same volume of oil.
> When enlarged 8-qt pans for the 351C in a Pantera showed up, the 'std
> overfill' for high rpm use became 10 quarts. FWIW, I've always run 8-1/2
> qts in our
> 17-yr-old 6500-rpm-limit engine- lately, with a remote filter &
> oil-to-water
> heat exchanger with remote oil thermostat, all plumbed with dash-6 lines.
> The
> stock dipstick shows "full" under these conditions.
>
> As for the dipstick- initially, Panteras got std front-engine Mustang
> dipsticks, but since one has to remove the engine screen and grope around
> far up at
> the front of the engine to find & return a front-mount stick, owners
> simply
> weren't checking their oil, and warranty costs increased. So Ford did a
> change to
> braze-modify Mustang sticks and add a tubing guide so rear access for oil
> checking was easier- hence the first TSB (May '72- bulletin 1, article 4)
> that
> adds a long flexible dipstick. Some of the first few modified sticks (done
> by an
> unnamed outside contractor) were done to the wrong length and installed in
> some Panteras, so a second TSB (March '73- bulletin 5, article 34)
> specifies
> exactly 38 inches tip-to-stop. Also, occasionally one of the
> braze-modified
> sticks breaks from vibration and unskilled gas station mechanics "fix" it-
> to the
> wrong length.
> One wrong-length stick with a  really sloppy braze-job (so I think it was
> l
> ocally repaired) showed up in a Nor-Cal Pantera some time ago and caused
> much
> yelling & arm-waving between the owner and a local engine builder before
> they
> thought to check the length- which was way-short. The poor engine had 10
> qts of
> oil in a stock pan, and all the seals were leaking!
> Finally, since all Pantera-specific "big pans" only extend the sump
> horizontally and do not lower it, std 38" dipsticks are inherently
> calibrated- not by
> 1-qt/2-qt volumes but by 'low' and 'full'. Cheers- J DeRyke
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-- 
Michael L. Shortt
Savannah, Georgia


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