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Oil Cooler, where to place?
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Martijnus  



Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands

PostPosted: Sat Jun 07, 2008 10:53 pm    Post subject: Oil Cooler, where to place? Reply with quote

I have just bought a second hand oil cooler, don't know what it's from, but it slipped out of my hands a sec after I handed the money..

nothing seriously...but anyway...

I've popped the hood to see where I could fit it nice... of course I want to give it some fresh air, but the only place would be where my coolant radiator is.

So, what's the smartest thing to do... fit it in front of the coolant rad, or behind it?

I guess in front is better... oil is more important than coolant and the coolant has a huuuuuuge surface to cool.

The downside is that the part where the oil cooler is, will heat up my coolant instead of cooling it down...

If I place the oilcooler behind the coolant rad, I have the same sort of problem... the coolant will be 60C, oil 80+ which gives a rather small temp difference and cools my oil less...

Any empiricists who can help me out?

size of the oil cooler is about 25cm by 15cm

Side question... my splitter sends all oil through the cooler when above 80C, so if my oil lines are too slim, I can get problems right?

Any standard sizes to use?
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment
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ideola  



Joined: 01 Oct 2004
Posts: 15493
Location: Woodstock IL

PostPosted: Sun Jun 08, 2008 5:24 am    Post subject: Reply with quote

How to install an aftermarket oil cooler
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88 924S SE | 82 931 Holbert | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition
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Min  



Joined: 04 Nov 2002
Posts: 2368
Location: Vernon, British Columbia, Canada

PostPosted: Sun Jun 08, 2008 11:12 am    Post subject: Reply with quote

I put one to the side under the headlight behind the bumper.

Min
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1980 n/a with EDIS and Megasquirt II Injection. 7 different colors and counting.
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924RACR  



Joined: 29 Jul 2001
Posts: 8275
Location: Royal Oak, MI, USA

PostPosted: Mon Jun 09, 2008 10:23 pm    Post subject: Reply with quote

Indeed, you need to get more creative with placement - mine is off to the side, behind the horns. It gets decent airflow there, enough to do the job.
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Vaughan Scott
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Scorpio  



Joined: 05 Jul 2007
Posts: 1957
Location: Brisbane, Australia

PostPosted: Mon Jun 09, 2008 10:41 pm    Post subject: Reply with quote

Quote:
Indeed, you need to get more creative with placement - mine is off to the side, behind the horns. It gets decent airflow there, enough to do the job.


do you know the dimensions of your unit 924racr ?
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1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!
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924RACR  



Joined: 29 Jul 2001
Posts: 8275
Location: Royal Oak, MI, USA

PostPosted: Mon Jun 09, 2008 11:29 pm    Post subject: Reply with quote

Yes - it's an 8.5x11" plate-style cooler, screw-in fittings (not barbs). Cost is around $60-70USD, sold by B+M as a trans cooler.

VERY durable; you might be concerned about the apparent location, but it's actually hanging below the frame rail, below the headlight motor, and in fact I've put it into a few walls and gravel traps without damage. Much more durable than the tube and fin style!
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Vaughan Scott
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'79 924 #77 ITB racecar
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Chrenan  



Joined: 15 Jan 2003
Posts: 3899
Location: Canada

PostPosted: Tue Jun 10, 2008 12:38 am    Post subject: Reply with quote

Here's a question, if I wanted to install an oil cooler on an NA, but not relocate the oil filter, is there a shorter oil filter that can be used so clearance with the header isn't an issue?
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Smoothie  



Joined: 01 Jan 2003
Posts: 8030
Location: DE (the one near MD, PA, NJ)

PostPosted: Tue Jun 10, 2008 12:56 am    Post subject: Reply with quote

Chrenan - http://www.924board.org/viewtopic.php?t=18216&start=13
The AC-Delco PF-53 and other brands numbers listed to the right of it should be approx. 3.5" long, and with the correct 3/4"-16 thread here -> http://www.trasko-usa.com/crossref.htm
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'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox
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Chrenan  



Joined: 15 Jan 2003
Posts: 3899
Location: Canada

PostPosted: Tue Jun 10, 2008 1:14 am    Post subject: Reply with quote

Hey, excellent thanks! I've been thinking of adding an oil cooler, just can't bothered moving the oil filter. I've got the 931 valance so I've got a spot all picked out for the cooler.
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Martijnus  



Joined: 29 Dec 2006
Posts: 2019
Location: Netherlands

PostPosted: Tue Jun 10, 2008 8:25 am    Post subject: Reply with quote

have had a look under the hood, but I still can't find a decent place. In front of the wheels (beneath windscreen washer fluid container thingy) won't work in my case.

I've got some sort of strange front spoiler.

I'm quite sure there are shorter filters, don't know what consequences that has... shorter replacing intervals, but also less adequate flow through the filter?


What happens if I put it in front of my coolant radiator?... or will I be the first?

Ever had a look under the hood of a mercedes benz ML series? they've got a nice array of coolers in front... I guess it's about 7... and behind all that there's a coolant radiator... hehehe...
so if the 924 radiator isn't undersized, I guess it won't be a problem to mount the oil cooler in front of it...

and if it doesn't work out, I can always re-place the oilcooler... if I keep the lines in mind...
_________________
"Rule: Turbo's make torque, and torque makes fun." (C. Bell)

924 "50-jahre", 1981.
MSII/extra, LPG, ITB's, 5lug.
To be turbo'ed in a while.
Killed her at the Nurburgring, Porscheless at the moment
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Smoothie  



Joined: 01 Jan 2003
Posts: 8030
Location: DE (the one near MD, PA, NJ)

PostPosted: Tue Jun 10, 2008 8:41 am    Post subject: Reply with quote

Martijnus wrote:
What happens if I put it in front of my coolant radiator?... or will I be the first?

Not a problem - that's the more commonly chosen location for them.
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"..it's made in Germany. You know the Germans always make good stuff."


'82 924T, US version, dark green metallic, 5 speed Audi 016G gearbox
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ideola  



Joined: 01 Oct 2004
Posts: 15493
Location: Woodstock IL

PostPosted: Tue Jun 10, 2008 9:20 am    Post subject: Reply with quote

That's where I put mine on the NA, and afterward, I experienced a 20-30 drop in oil temps, and the coolant temp gauge rarely if ever passes the first tick.
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88 924S SE | 82 931 Holbert | 81 Euro 931 | 81 Weissach | 80 US 928 | 80 US 931 '941' | 78 D-Prod Replica | 78 w/D-Prod kit | 78 Poli-Form | 78 Limited Edition
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leadfoot  



Joined: 11 Dec 2002
Posts: 2222
Location: gOLD cOAST Australia

PostPosted: Tue Jun 10, 2008 10:00 am    Post subject: Reply with quote

or you can find a euro 90 deg oil filter adaptor as these came stock so there was no interferance with the steering column. you could use a larger filter and a sandwich plate and still clear the crossmember.
Stu
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Scorpio  



Joined: 05 Jul 2007
Posts: 1957
Location: Brisbane, Australia

PostPosted: Wed Jun 11, 2008 10:23 am    Post subject: Reply with quote

Is their a difference between an oil cooler an a transmission cooler apart from the name?.. pressure capacitys, fittings , flow rates etc? found a nice 20 something row trans cooler new for $40
_________________
1979 NA
MS1..EFI..
GARRETT T25 TURBO
BILSTEIN SHOCKS
GT BASED CUSTOM BODYKIT

Brisbane , Australia
Think mean think fast
all youll see is
my Porsches Arse!!!
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Chrenan  



Joined: 15 Jan 2003
Posts: 3899
Location: Canada

PostPosted: Wed Jun 11, 2008 1:31 pm    Post subject: Reply with quote

Whatever you buy, make sure it has threaded fittings and not hose barbs.
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