Oil Cooler Wiring

[DesertG]

Unfortunately, the prior owner put an external oil cooler with a fan on this car. I will remove it eventually, but I want to make sure it was done right.

I there was no thermostat, so I have one now to put in.

On the car, how do I tell which hose would be the oil inlet vs outlet.

Can the 12v Keyed power be the positive side of coil?

I like the on off light indicator. Where do you mount one in the car.

Thank you!

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1965 Beetle, 1970 1600cc DP 60HP, 12v

[Brian_e]

Put the t-stat on the outlet side, then the oil will warm up faster, and the fan will run less.

Also run a ground to the t-stat switch, and let that ground 86 on the relay on/off. Run the keyed 12v straight to the 85 on the relay. It usually makes for less wire runs, and it is easier to wire that way. Less current running through the t-stat switch.

Brian
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www.type-emotorsports.com

[DesertG]

Thanks Brian. On the car, how do I tell which hose would be the oil inlet vs outlet. Can the 12v Keyed power be the positive side of coil?
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1965 Beetle, 1970 1600cc DP 60HP, 12v

[Glenn]

[DesertG]

Thanks Glen, here is what I have. Does the prior owner have the (broken) thermostat on the line in?

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1965 Beetle, 1970 1600cc DP 60HP, 12v

[vwracerdave]

With a 1600cc engine as in your signature I would immediately remove the auxiliary oil cooler and install a dog house oil cooler and shroud, no matter what the cost and eliminate all you extra baggage and head aches. The way the cooler is mounted up against the package tray there is not very much room for cool air to circulate around it. I'd bet your engine would run a lot cooler with a factory dog house cooler and shroud.
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2017 Street Comp Champion - Thunder Valley Raceway Park - Noble, OK
2010 Sportsman ET Champion - Mid-America Dragway - Arkansas City, KS
1997 Sportsman ET Champion - Thunder Valley Raceway Park - Noble ,OK

[Glenn]

Looks like the stock non-dog house cooler was remove and this is the only cooler.

I'd go back to stock or convert to a dog house oil cooler and remove the remote one. It's probability not needed.
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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

[Dale M.]

Best solution is as others say, just replace what you have with stock cooler...

With the adapter that is on engine the upper hose is "OUT" of engine and "IN" to cooler, the lower hose connection is "IN" to engine and "OUT" of cooler....

Don't know what the device is in hose, everyone does this sort of thing different/non standard...

Relay polarity in real life does not matter.... Unless it had a diode across the coil windings... The current passing through the coil creates a magnetic field which causes armature to move, closing a set of contacts that is all it is... And Yes technically 85 should be ground or negative and 86 should be 12 volts or positive by DIN standards ...

And yes cooled where mounted so close to bottom side of package tray is very poor for air flow... It makes it almost useless.... It needs more air gap for air flow...
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“Fear The Government That Wants To Take Your Guns" - Thomas Jefferson.

"Kellison Sand Piper Roadster" For Street & Show.
"Joe Pody Sandrover" Buggy with 2180 for Autocross (Sold)
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All suggestions and advice are purely my own opinion. You are free to ignore them if you wish ...

[tripicana]

On your electrical drawing, usually #85 on the relay is ground, and #86 switched power. Sometimes it doesn’t matter, sometimes there is a diode in the relay and it does. Just fyi
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foam cowboy hats aren't good helmets.

[DesertG]

Thank you guys. Can the 12v Keyed power be the positive side of coil?
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1965 Beetle, 1970 1600cc DP 60HP, 12v

[vwracerdave]

[DesertG]

the fan will be connected to a relay
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1965 Beetle, 1970 1600cc DP 60HP, 12v

[tripicana]

I don’t see a problem running it off the coil. It’s such a small current needed to activate. Just fuse #30 from the battery and you’re good.
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foam cowboy hats aren't good helmets.

[DesertG]

After reading more, I am guessing the prior owner added this oil cooler because of 1600cc and no vents on the deck lid. Not sure.

I am going to rewire this weekend. Which way should the fan spin. Sucking air down or blowing air up through the heat exchanger.

Also, if anyone added the light to let you know the fan is running, where did you mount one. I like the idea.

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1965 Beetle, 1970 1600cc DP 60HP, 12v

[Ohio Tom]

you should put the thermostat on the "IN" hose to the cooler.
If you put it on the out, it will cause it to "short cycle" and wear out the relay real fast.
Better to have it control the fan based on oil coming right from the motor as it will be most accurate and it will stay on continuous until temps are brought down (no short cycling).

[DesertG]

thanks Tom, yes, will run from Oil In line. Which direction should the fan blow..
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1965 Beetle, 1970 1600cc DP 60HP, 12v

[Ohio Tom]

[DesertG]

Thanks Tom!
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1965 Beetle, 1970 1600cc DP 60HP, 12v