The Oil cooler probably won't help with the overheating. It will help your
oil pressure by keeping your oil at a more suitable temperature. The best
way to assure this is by using an inline thermostat with your cooler. This
will allow the oil to reach it's operating temp as quickly as the stock set
up. Then when your oil starts getting too hot. The thermostat opens and
allows the cooled oil to circulate. Just like your engine coolant system.
When I fitted a 13 row oil cooler to my TR6. I filled the sump as
standard. Threw a quart in the car and went for a drive. When the
thermostat opened, you can sometimes hear the thermostat open, I pulled
over and topped off the oil level. I don't have a problem of too much oil
draining back into the pan, the thermostat holds the oil in the cooler and
the lines.
The change to the spin on filter was nice also.
Shawn Loseke
1972 TR6
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Original Text
From: "Greg Tobin" <greg.tobin@mci.com>, on 1/7/99 2:09 PM:
This spring, I plan on installing an oil cooler to my '72 Mark IV to
help cool it down from the 80 mile round trip to work at 5000rpm at
7000foot
elevation. The 1 gallon capacity radiator just doesn't cut it, even with a
supplemental fan and proper shrouding.
When you install an oil cooler what is the consensus for adding any
more oil to the crankcase to compensate for the extra volume now added by
the cooler?
The engine is meant to have a certain amount, ~4 quarts, to keep
everything happy and cool, yet if you add the cooler, you effectively drain
off almost a quart that is at anytime going through the cooler and hoses,
and was previously coursing through the motor. Is it recommended to add
an
extra 1/2 quart (or more, depending on the cooler) to keep the oil at the
proper quantity in the motor?
I'm leaning towards the side that says it won't be a problem: First,
most of the 'sandwich' plates that go between the filter and the block have
some sort of anit-run-back valve, preventing the crankcase from getting too
full, casuing too much splash back on the reciprocating assembly (and
broken
pistons). second, the cooler will most likely be at almost the same height
as the oil pan, and will hold the oil in it anyways, casuing no harm.
Any thoughts on this?
Of course, the flip side to this is that once I install the cooler, I
won't be able to tell that my dwell is off by 2 degrees due to it running
too hot...
Greg Tobin
72 Mark IV Daily Driver, 40K original miles.
79 1500 Garage Potato, soon to be a Spit-6
70 GT6+ 2.65 Cars in boxes, enough spares to make a Spit-6
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