External Oil Cooler Mount / Air Directional Flow Theory

[SGKent]

Scott I like your design. I can see from the photo it is well thought out.

Sodbuster - am sure yours works well.

When a fan sits over a radiator / cooler, it must cover almost 100% or the air simply flows around the cooler and draws in from the side because of the more restrictive fins. Think of a hose - even a small hole in it results in a huge leak because it is easier for the fluid to go thru the hole than down the more restrictive path. I've seen racing engines overheat because of small gaps in the cooling shroud between the fan and radiator. If there is a gap on the side of the fan where it overhangs the radiator / cooler, find some sheet metal to block that area.

The top image will work because the fan will pull thru the fins. The bottom image will lose most of its cooling ability unless the section overhanging the fins is blocked off.

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"Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin

[richparker]

My cooler has a custom shroud built around it.

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’71 Westy build
Adventure thread
’65 Deluxe Build

[Glenn]

^^^^^^
Dual Type 1 coolers?
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Glenn
74 Beetle Specs | 74 Beetle Restoration | 2180cc Engine
"You may not get what you pay for, but you always pay for what you get"

Member #1009

#BlueSquare

עַם יִשְׂרָאֵל חַי

[richparker]

[SGKent]

that will work. Good job.
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"Most people don't know what they're doing, and a lot of them are really good at it." - George Carlin

[plywoodkid]

Rich,

That is slick….

Well done!

[richparker]

The coolers run parallel. The oil enters a machined aluminum block, splits, 1/2 runs through each cooler and rejoins in the aluminum block before going to the filter and back to the case. My fan pushes air over the cooler. This set up is located on the drivers side of my engine bay. In this location the oil lines are short and everything is protected from the elements. After taking many readings with a IR gun and comparing them to my gauges, the oil is returning to the case 30° cooler then it left.

I also have a 180° Tstat and use a Wix 51515 filter, which is also in the engine bay.

2 case plugs were removed and were machined to accept the fittings. The oil comes out the lower line, returns in the upper line and goes through the factory oil cooler (I have a T4 cooler in place of the T1) before it goes to the bearings.

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’71 Westy build
Adventure thread
’65 Deluxe Build

[Splitdog]

Next time the shroud is out ditch the stock cooler. Temps will drop.
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CH³NO²

Z = z² + C

Der Blitzkrieg Kafers

#notacallooker

[mikedjames]

This is the cooler I have used for about 10 years.
Its only failure was that after a while the stainless steel sheet (ex Ikea bathroom cabinet) cracked and I was dragging one side along the road for a while. A quick zap with some stainless steel wire in the MIG welder and a few strips of fresh metal, it's back.

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Ancient vehicles and vessels

1974 VW T2 : Devon Eurovette camper with 1641 DP T1 engine, Progressive carb, full flow oil cooler, EDIS crank timed ignition.
Engine 1: 40k miles (rocker shaft clip fell off), Engine 2: 30k miles (rebuild, dropped valve). Engine 3: a JK Preservation Parts "new" engine, aluminium case: 26k miles: new top end.
Gearbox rebuild 2021 by Bears.

1979 Westerly GK24 24 foot racer/cruiser yacht Forethought of Gosport.
1973 wooden Pacer sailing dinghy

[richparker]

[Splitdog]

I have a 2165 turbo motor with no thermostat, flaps, or velocity ring. Also not running any front, or rear tin. I was in LA, and oil temps were 200* going down the freeway. I removed the stock cooler, blocked it off, and welded up the hole in the rear of the fan shroud. I am running a 72 pass cooler up under the package tray. My oil temps dropped 10*. It's because I'm getting more air over the heads, where the heat is made. Then cooling the oil downstream later. If you run an aftermarket cooler and fan, you definitely gain by removing the stock cooler. My .02.
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CH³NO²

Z = z² + C

Der Blitzkrieg Kafers

#notacallooker