Mercedes oil cooler

N97746 · 03-24-2020, 05:16 PM

Planning on a +T this summer, gathering parts now. Buddy is dismantling an '84 MB turbodiesel and offered me the oil cooler. I have the setup off a 740 turbo but there is some pitting on the cooler where the air scoop made contact. Didn't want to use it, as is, and get a leak down the road. I could see about having it repaired or just re-plumb and use the MB unit. I'm sure that I read on here somewhere that it was a step up from the 740 turbo cooler but a more reasonable size than the RX7 unit.
Additional info, '93 engine, NPR, 16T, probably a 2 1/2 exhaust currently T cam. To be used as fun car to forget about work etc.
Thanks

122power · 03-24-2020, 05:46 PM

Try the ford truck f 250, oil coolers if you can find any around. They have 1/2 npt so easy to hook up and get AN adapters.

benflynn · 03-24-2020, 06:22 PM

Not rx7? Nice oil cooler

N97746 · 03-24-2020, 07:06 PM

The Mercedes unit is OEM, made by Behr. Didn't get exact measurements but was about 17x4x1 3/4 or so. Located alongside the radiator, like the Volvo unit, so pretty well protected. No bent fins etc.
I did mention it was free?

JohnLane · 03-25-2020, 11:56 PM

OP the OE Volvo water/oil cooler is effective and requires no fiddly external oil cooler lines.

spock345 · 03-26-2020, 12:47 AM

Quote:

Originally Posted by N97746

The Mercedes unit is OEM, made by Behr. Didn't get exact measurements but was about 17x4x1 3/4 or so. Located alongside the radiator, like the Volvo unit, so pretty well protected. No bent fins etc.
I did mention it was free?

If it is free I would figure out what other parts you need to get it to fit and then compare it to the cost of OE Volvo replacement parts. That should make you decision pretty easy.

In my experience a lot of OE Mercedes stuff prior to the Daimler-Benz/Chrysler merger is rock solid.

N97746 · 03-26-2020, 08:25 AM

John, I do have a complete water to oil cooler, but when I was mocking things up for clearance issues it seems that the end of the oil filter will be very close to the turbo downpipe. While the sandwich plate will move it away from that area, I'll just have to contend with keeping oil off the engine mount during filter changes.

Spock, the cooler will be coming off an early '80s model. everything on that car seems pretty well made. Good idea though to make a list of adapter fittings, hose etc. to see what the cost will be.

03-24-2020, 05:16 PM	#1
N97746 Board Member Join Date: Jan 2019 Location: Northeast PA.	Mercedes oil cooler Planning on a +T this summer, gathering parts now. Buddy is dismantling an '84 MB turbodiesel and offered me the oil cooler. I have the setup off a 740 turbo but there is some pitting on the cooler where the air scoop made contact. Didn't want to use it, as is, and get a leak down the road. I could see about having it repaired or just re-plumb and use the MB unit. I'm sure that I read on here somewhere that it was a step up from the 740 turbo cooler but a more reasonable size than the RX7 unit. Additional info, '93 engine, NPR, 16T, probably a 2 1/2 exhaust currently T cam. To be used as fun car to forget about work etc. Thanks

03-24-2020, 06:22 PM	#3
benflynn bigpimpin740t@yahoo.com Join Date: Mar 2005 Location: Birmingham Al	Not rx7? Nice oil cooler __________________ 85 744 Turbo F+T big valved531, stg5 cam, msns, m47, sways, bills, 53mm t3/t4 9lb flywheel, dual 044s, 80lbs, npr og

03-25-2020, 11:56 PM	#5
JohnLane Board Member Join Date: Nov 2002 Location: Northern Washington	OP the OE Volvo water/oil cooler is effective and requires no fiddly external oil cooler lines. __________________ Overkill is consistently more fun.

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03-24-2020, 07:06 PM	#4
N97746 Board Member Join Date: Jan 2019 Location: Northeast PA.	The Mercedes unit is OEM, made by Behr. Didn't get exact measurements but was about 17x4x1 3/4 or so. Located alongside the radiator, like the Volvo unit, so pretty well protected. No bent fins etc. I did mention it was free?

03-26-2020, 08:25 AM	#7
N97746 Board Member Join Date: Jan 2019 Location: Northeast PA.	John, I do have a complete water to oil cooler, but when I was mocking things up for clearance issues it seems that the end of the oil filter will be very close to the turbo downpipe. While the sandwich plate will move it away from that area, I'll just have to contend with keeping oil off the engine mount during filter changes. Spock, the cooler will be coming off an early '80s model. everything on that car seems pretty well made. Good idea though to make a list of adapter fittings, hose etc. to see what the cost will be.