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Anyone running a Diesel Geek Oil Cooler yet?

663 Views 3 Replies 3 Participants Last post by  Daemon42
I'm looking for impressions from anyone who actually has it, as opposed
to theories on whether it'll work. It's basically just a larger than stock oil to coolant
heat exchanger.
I've been considering a regular oil cooler for a while, but my concern is about low
temp (wintertime) operation. Sandwich plates allow a small amount of oil to flow through the cooler
even when they're "closed", so in the winter you still can get some noticable cooling of the oil,
to the point that it may never come up to proper operating temps. The problem was reported
by someone using the Neuspeed oil cooler some time ago. He had a normal sandwich plate
and ended up having to put cardboard over the oil cooler to get the oil temps
up to a reasonable level.
Anyway, this diesel geek unit looks like it might help. It can't possibly be as effective as an
external cooler, but our cars seem to be pretty good at holding the water
temp at 190F, but the oil temps always skyrocket, so an improved oil/water heat
exchanger should bring the oils temps down noticably. I know that on the track it's
unlikely to help much as I've seen my water temps start to go up after only 2 or 3 hot laps,
and this will only make that happen sooner but for normal sport driving it should work fine.
If anyone has one, I'd like to hear your impressions.
1 - 4 of 4 Posts
Re: Anyone running a Diesel Geek Oil Cooler yet? (Daemon42)

Looks good, buy it and let us know...
Re: Anyone running a Diesel Geek Oil Cooler yet? (Daemon42)

Mk4s already have a water-to-oil oil cooler/preheater on the block next to the oil filter housing. And their claim about water and oil temperature always being off by many degrees is a little misleading. Your water temp gauge is just severely over-dampened as in most cars to keep drivers from flipping out when it rises over "Normal."
Re: Anyone running a Diesel Geek Oil Cooler yet? (mityVR6)

Nothing special about the Mk4's.
Mk3's have the same water/oil heat exchanger. Always have. It just doesn't work very
well. The Dieselgeek cooler is just a larger replacement for the stock unit.

[Modified by Daemon42, 2:14 AM 2-11-2002]
1 - 4 of 4 Posts
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