External oil cooler

Engines and Engine Systems
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Re: External oil cooler

Post by Wilkie »

Hi guys.....there are a few questions or pointers or queries
the height of oil cooler ..if to high can drain back into sump when engine not running and then initial dry start up ....
Pipe diameters.....if to small or to long the oil pump will work harder and therefor the build in pressure release valve will kick in and insufficient oil pressure which mean the last parts in the oil feed line will starve (normally top of cylinder head) all though the oil gauge or light shows other wise ...

Sorry guys just asking ??????
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Re: External oil cooler

Post by Michael »

This is a very interesting topic.....I like it :lol:

Cedric, I know that the preassure from the pump will be the same throughout the engine, but the thing Im not 100% sure of is the following.

There are two oil preasure regulators on the engine, one is right there at the oil filters and the other one is sitting right ontop op this plate in discussion. So if both regulate the say 5 bar for instance then yes I agree.
But its very jnteresting that Christo got a lower preasure on that side of the engine....

What I ment on the 10L of oil is the following.
10L of oil is plenty, and if the flow/volume of oil is too little the engine will heat up the oil faster than the cooler can cool it.
Example: the engine circulates say 15L/min and is heating the oil up but the oil cooler only circulates 5L/min then the oil cooler will have a better cooling in oil temp if you measure in temp vs out temp but will circulate 3 times leas oil than what is been heated by the engine.
But more volume of oil will be exposed to heat so who wins in the end? Or am I not making sense?
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Re: External oil cooler

Post by offroadbiker »

:think:
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Re: External oil cooler

Post by ChristoSlang »

[quote="ricster"]One would ultimately want to get the oil to travel at as slow a speed as possible to maximize exposure time to the cooling part of the system./quote]

Cedric, here's an analogy for you: If you want to cool your car's cabin down, do you switch the fan speed to 1 so that the air can get really cold to cool the cabin down optimally, or do you crank it up to 3 so that you get more cold air into the cabin?

Whatever your answer to this question is, would work best for an oil cooler too. Cooling down the cabin the fastest means that you're changing the temperature on the input side the fastest, which is what you want to do to the oil cooler...
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Re: External oil cooler

Post by Peter Connan »

Good analogy Christo!

Re water pressure regulators: obviously, flow and pressure are inter-dependent, and while there are many other factors involved, reducing the pressure in any sytem without changing any other variable will reduce the flow rate.

Thus, by doing this water usage will be reduced for certain processes which are governed by time. But I doubt it will make much difference, because in fact the users will just open their taps larger or run the water for longer.

The best way to reduce municipal water usage is to keep the distribution systems in better condition so that leakage is reduced...
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Re: External oil cooler

Post by StumpyTD42 »

Hi. Sorry to revive an old thread, did anyone have the part number for the sandwich oil plate? I see there was a mention of the price and dealer to get it from but im Located in Australia and we have no access to such item but I am trying to source them.

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Re: External oil cooler

Post by Peter Connan »

The sandwhich plate is not a Nissan item.
Any motor racing shops should either have them or know where to get them.
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Re: External oil cooler

Post by StumpyTD42 »

Did you see the posts prior? That's not a off the shelf oil cooler sandwich plate that works off the rhs of the block oil pressure relief valve. The ones that work under the filters don't do anything on a TD as both filters work in parallel.

The one pictured on page 3 of this thread was mentioned to be available from a Nissan Dealership in Africa.
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Re: External oil cooler

Post by Peter Connan »

Ah, terminology, sorry. I would not have thought anybody would call that a sandwhich plate.

Can I suggest that you may be able to find the part number on Partsouq?
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Re: External oil cooler

Post by StumpyTD42 »

All good.

I have been through every single listing for a TD42 in every single make and model vehicle and there is nothing listed in any picture breakdowns. Thats why I was hoping the old user who posted this would reply.

Someone recently posted the same pictures and photos on Facebook and they are not accepting personal messages or replying either.
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