SoCal Jet Boats

Tech Talk => Engine Mechanical / Electrical => Topic started by: FordLover on July 01, 2016, 02:38:38 PM

Title: Oil and Water Temp
Post by: FordLover on July 01, 2016, 02:38:38 PM

I was thinking(I know! It was big of me to actually think), but does engine temp reflect oil temp or vice versa?  Can you have a cool running engine but hot as sh!t oil temp? Or if one is hot obviously the other is hot? I dont know, just curious. Little Friday thinkin.
And if oil gets too hot what can happen? I am full of questions, next I want to know how babies are made.

Title: Re: Oil and Water Temp
Post by: mash on it on July 01, 2016, 02:58:08 PM

120 water temp and 220 oil temp...ABSOLUTELY. and yes, have done it many times.
Now I run an oil cooler, oil at 190ish now.

Dan'l

Title: Re: Oil and Water Temp
Post by: GT Jets on July 01, 2016, 03:01:06 PM

Oil temp should be over 200°F.

FYI

Also,  what do you think cools the oil?

Title: Re: Oil and Water Temp
Post by: FordLover on July 01, 2016, 04:48:57 PM

What cools oil? Trick question? You and your shenanigans Glenn!
But I would guess what would cool the oil is the water flowing through the block? Am I close?
I dont have an oil cooler.

Title: Re: Oil and Water Temp
Post by: GT Jets on July 01, 2016, 05:07:21 PM

Quote from: FordLover on July 01, 2016, 04:48:57 PM

What cools oil? Trick question? You and your shenanigans Glenn!
But I would guess what would cool the oil is the water flowing through the block? Am I close?
I dont have an oil cooler.

Not a trick question at all.

The heads cool the oil.

Think about it.

The reason I bring it up is what is the first modification done to an Oldsmobile?

Title: Re: Oil and Water Temp
Post by: FordLover on July 01, 2016, 05:39:43 PM

Quote from: GT Jets on July 01, 2016, 05:07:21 PM

Not a trick question at all.

The heads cool the oil.

Think about it.

The reason I bring it up is what is the first modification done to an Oldsmobile?

My name is not Oldslover, but I believe some more drain type holes are put in the heads? Damn man, I didnt know the heads do the cooling. Learn something every day.

Title: Re: Oil and Water Temp
Post by: GT Jets on July 01, 2016, 11:48:41 PM

Quote from: FordLover on July 01, 2016, 05:39:43 PM

My name is not Oldslover, but I believe some more drain type holes are put in the heads? Damn man, I didnt know the heads do the cooling. Learn something every day.

Flow restrictors are installed to slow the oil flow to the heads through the rockers. the oil spends almost as much time on the surface of the heads than it does in the pan,. The heads have quite a lot of water flow as far as what areas are in contact with the oil, the block not so much.

Windage is the largest contributor to high oil temp. The oil foams and cannot get thermal continuity adequate enough to lose the temperature.

Screwy, right?

GT

Title: Re: Oil and Water Temp
Post by: FordLover on July 02, 2016, 08:05:16 AM

Thanks dude. That is very intetesting. Good stuff to know

Title: Re: Oil and Water Temp
Post by: FordLover on July 02, 2016, 09:32:13 AM

So a lot of boats I notice dont have oil temp, mainly oil pressure. How would you know your oil is to hot? I am sure GT MacGyver has a trick or two.

And do certain oils hold up better than others to heat?

Thanks

Title: Re: Oil and Water Temp
Post by: GT Jets on July 02, 2016, 11:06:48 AM

Quote from: FordLover on July 02, 2016, 09:32:13 AM

So a lot of boats I notice dont have oil temp, mainly oil pressure. How would you know your oil is to hot? I am sure GT MacGyver has a trick or two.

And do certain oils hold up better than others to heat?

Thanks

Weight of oil is the largest factor when choosing oils.

You can check the approximate oil temp with an infra-red (non contact) thermometer. Hit the pan after a run.

They also make temperature indicators,  machine shops use them to stick to rebuild engines and heads.

Just glue one to the oil pan.

A temperature gauge is obviously the best,  but this broke ass has no money for all that.

GT