quick help needed 4.2 oil lines - Defender Source
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Old February 10th, 2006, 09:25 AM
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Tony Brooks
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quick help needed 4.2 oil lines

Can anyone tell me offhand if the oil cooler sandwhich plate is the same on a 3.9 as it is on a 4.2?

Thanks,

Tony
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  #2  
Old February 10th, 2006, 11:58 AM
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Jeff Sturgis
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Tony,

Looking at the sandwich plates I have from a 3.9 and 4.2, they are the same. Obviously the oil lines and style of fittings (3.9 using banjo type) are different, but the sandwich plate itself looks to have the same dimensions and part numbers.
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Old February 10th, 2006, 12:27 PM
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Should be, they use the same block just with different crank, rods and pistons.

-Hans
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Old February 10th, 2006, 12:45 PM
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Tony Brooks
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Thanks Hans -- I actually just heard back from the shop (I took it in to get some rewiring done, I'm a wiring moron) and they now claim that it's not the oil cooler lines, but both the transmission cooler lines AND the cooler itself. I'd love to figure out a way to retrofit an aftermarket cooler (OEM is >$500) and run the lines as you did for the oil lines. Now I just need to figure out the adaptors needed to go into the zf . . .
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Old February 10th, 2006, 12:53 PM
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David Marchand
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Did you call Roversdownsouth? They have a ton of these left from the hurricane.
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Old February 10th, 2006, 02:07 PM
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Aftermarket transmission coolers are all over the place, at just about any auto-parts store. Even decent ones will at around the $100 mark or less.

Is it at a Rover dealership where they won't do anything but geniune parts? Or at a normal mechanic who would be willing to fit a universal part instead?

-Hans
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Old February 10th, 2006, 02:32 PM
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Tony Brooks
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It's at the local rover specialist roverland 4x4. I tried universal parts with them on the door lock actuators and they balked. I *think* I may have pieced together the fittings to make this happen with a universal cooler using much the same parts that you and I both used on the oil cooler line conversion. The only thing left to do is confirm the thread on the tranny and find a generic cooler that will easily take 1/2" ID hose.

The cheapest I've found the OEM cooler assembly is $350 from RN of all places.

Edit for the sake of clarity: this is on my '93 lwb, not the defender, though the solution, if I figure it out, should work on any zf rover.
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Old February 10th, 2006, 02:33 PM
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Well, here's your oportunity to swap out both coolers with better units and do all the hoses as well. You'll end up with off the shelf items, cheaper and better than stock. That's my plan for this summer.

Look on Ebay for cooler ideas as there's always a good selection with good info to get you started.

Problem may be where to put them. I believe in front of the radiator should work. Put one on top of the other starting from the bottom. I don't think there's room where the stock tranny coolers is for a rectangular style one. You can even mount them vertically, one on each side, if you're worried about hampering radiator air flow - keeping the middle of the radiator open.
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Old February 10th, 2006, 02:38 PM
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Summit sells a variety of generic coolers that look as though they'll be approximately the same dimensions as the factory cooler. I'll stick with the in-the-radiator cooler for the oil for the time being.
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