All Things Mk5 > Performance Modifications

Aftermarket Oil cooler

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bobby_fodge:
Has anyone fitted an oil cooler? What brands have you used?

LC5F:
I’ve not fitted one to a Mk5, not sure how without a spin on filter.
But I have had a Mocal sandwich plate set up in 2 VW’s they are good quality and have a long history.
Setrab have a nicer finish, but are more monies, they do a really good bracket that also fits standard Mocal cooler.

If it’s a road car go for the thermostatic option.

They don’t usually come with a planned location - you need to work out brackets, the strips in the Mocal kit are pretty crappy - thus setrab bracket. Also to consider is...

Mounting - in order of best to worse - hose connections top cooler below, horizontal connections, worst is connections bottom cooler top

Hoses - original kit came with fixed lengths,  better to make them up, you could go full AN fittings, but the aeroquip rubber hoses are good.

Last time I checked Matt Lewis racing tended to be the most competitively priced.

pudding:
I wouldn't bother on a MK5, the oil doesn't get hot enough to need one during normal driving.   Decent synthetic oils can handle 130-140 degrees and the highest I saw mine get to on a long cruise was 98 deg.  Track days are a different story and would be the only time I'd consider a mocal or similar cooler.

Despite using an 80 degree sandwich plate and a smallish 13 row cooler on a few older VWs, the oil never got up to temp over winter and I ended up blocking the cooler!

LC5F:
Only 98! -My old daily mk3 valver used to sit at 110 on the commute, after adding oil cooler it sat at a very steady 90 come rain or shine whatever I did with no issue of over cooling - sounds like something wasn’t right with your old set up Pudding

Suppose it depends what the op wants to do - Personally, if the engine oil is regularly over a 100 Celsius I feel its too hot, I would rather have the spare heat capacity + at least 1/2 a litre extra oil. does much of the engine cooling, so uprated oil cooling takes pressure of coolant system.

pudding:
Yup!  I was surprised by that given my old Corrado VR6 used to sit at 120 degrees most of the time!  With a mocal 13 row it dropped to 98ish which was much better, but over winter it struggled to get over 86.  Nothing wrong with the setup, it was just too efficient at dumping heat in the colder months.  I guess I could have experimented with higher temp sandwich plates but I just gaffer taped a bit of plastic over the cooler instead  :grin:

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