Topic: thermometer placement

[Buffo]

I really want to put a really good thermometer on my pile. I would like it to be in the oil that just came out of the engine and is at its hottest. I believe that the best reading for oil temp would be at its hottest.

Would the oil filter housing be the right place to install the sending unit???

It there a difference in the temp of the oil in the pan to the oil in the filter housing??? How would I find that out??? (without drilling)

Don

[kghost]

Buffo,

ITS DRY SUMP.

That means the oil is picked up and returned to the tank. Very little oil stays in the bottom of the engine, the scavage pump puts it back in the tank.

Put a temp probe on the tank. This will measure the oil temp going into (and out) of the engine. You are really just concerned with the temp into the engine being ok anyway.

[TwoTired]

There is a couple schools of thought on the oil temp.

One is to know what temp oil is being supplied to the engine components, such as the main oil gallery, after the filter (which is finned to cool the oil).  This is good to know, so that the oil is within it's operating temperature when it is doing its work.  If the oil is too cold, the driver can then know not to pound on the engine, 'til the oil can do it's best work in the proper heat range.  If it is too hot, the operator can save the engine by backing off on the power and engine flail.

The other is to know how hot the oil gets anywhere is the system.
Heat can destroy the beneficial properties of oil.  Knowing how hot it EVER gets, tells the operator to change the oil after an overtemp is determined.

The oil return from engine to the oil tank on the 750 is where the oil should be it's hottest, having just been heated by the engine.  However, the scavenge pump also sucks air and foams the oil a bit.  This can make true temperature sensing problematic.  The oil tank does a bit of oil cooling, then it is pumped to the oil filter (more cooling), then it goes to the main oil gallery.

Where do you want to monitor the oil temp?

[Bob Wessner]

Found this via an earlier post on the subject.

http://www.shindypro.com/catalog/each_q_ptype.key33.html

Also, out of curiosity (wanted some sense for oil temp) after a good ride on a hot day, as soon as I got back to the garage, I dropped the sensor from a meat thermometer into the oil tank. It topped out at 180^oF.

[MRieck]

I run my temp gauge in the oil pan drain plug hole. Oil will be at its hottest point as it is basically all drain back. I'm more concerned with the temp of the oil prior to it going through the cooling process.

[Buffo]

Yes, Yes. I want to make sure I dont run cooked oil. It is allways hot in my area as I live in the seventh circle of hell. High 90's all the time.