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Old 12-08-2016, 10:19 PM   #1
trucupey
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LS swap radiator options

So I am about half way done with my swap and I am looking for some input on radiator options from people that have done it.

Here are the details on my swap. 87 e30 325i, LS2 fully rebuild with PRC heads and 220R cam, (I built the motor myself), t56, it is DBW.

The engine came out of a CTSV and I kept the CTSV accessories. The compressor bracket needed some work but everything else fit nicely.

I bought Garret's cd and it's great in some areas but terrible in others. In the radiator section it says the dimensions of the GM radiator he used but no part numbers. That it the point of buying the dam cd, not having to find the pn of the radiator.....

I have read some people have used the R32 Mishimoto radiator. Could you guys share the radiator you have used and the fabrication required to make them fit? Pictures and part numbers would be great. Also, he says in the cd that he went to the auto parts store and got some hoses. What about part numbers. Asking for help in a forum is one thing, but when you pay for it is a different thing.

I don't mind fabricating, but I don't want to reinvent the wheel if I don't have to. Thank you for your help.
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Old 12-09-2016, 08:16 AM   #2
lemansguy
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im going through my notebook where i have written down all my swap parts purchased or to be purchased, and I have notes stating a Spectra Radiator CU571 will work. ill try doing some googling and see if I can find out where I found that info.

EDIT: here it is http://www.r3vlimited.com/board/showthread.php?t=378900
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Old 12-09-2016, 12:25 PM   #3
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If I could do it again I wouldn't use the mishimoto r32 radiator. It's small and you will have to tap and install a hose barb for the steam vent. In fact, I will be getting this radiator https://m.summitracing.com/parts/gri-1-58242-xls . If you want I'll sell you my r32 radiator and mounts for super cheap. I can PM pics. But I suggest the griffin.


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Old 12-09-2016, 12:27 PM   #4
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That is a dual pass radiator, proper inlet/outlet on passenger side with a provision for steam vent. Cap is on driver side which is convenient for filling and checking. Don't worry about mounting as long as you have a welder you can make mounts very easily.


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Old 12-09-2016, 01:11 PM   #5
garretvs
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We're doing the annual maintenance on the E30 right now. We have finally found an inexpensive radiator that is a perfect fit. You may recall that our original radiator was a composite that we had custom made.

We have found that the Murray #433331 from O'Riley Auto parts is exactly the same as our original in shape, inlet & outlet, core size and header tank thickness. It also has a drain which will make coolant issues simple to deal with. One modification is necessary: cut off the little overflow nipple near the cap and plug it with an M6x10 screw. We tapped the hole in the nipple and used a little Permatex RTV sealant (for waterpumps, etc.). The radiator from O'Riley is only about $100.
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Old 12-11-2016, 12:20 AM   #6
trucupey
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Thank you for all the input. I am looking at the 3 primary options: Griffin Aluminum Circle Track Radiators 1-58242-XLS, R32 Mishimoto and O Rileys 433331.
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Old 12-13-2016, 06:35 AM   #7
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I used this radiator
https://www.mishimoto.com/nissan-sky...mishimoto.html

With these hoses
http://www.autozone.com/cooling-heat...8_25589_10495/
http://www.autozone.com/cooling-heat...22073_0_10495/

For steam vent, I drilled and tapped into the top of the water pump and ran a 6" line from the steam tube to a thread barb inserted into the water pump

You can see it in this picture


Mounts were pretty straight forward, I cut the old mounts off the radiator support and then re-welded them where they were needed. I used the stock BMW radiator bushings to cushion the new radiator (had to drill the bottom just a bit). Top mounts were made using flat stock Al currently held in place with self tappers until my nut riveter arrives.
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Old 12-13-2016, 07:14 AM   #8
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Quote:
Originally Posted by garretvs View Post
We're doing the annual maintenance on the E30 right now. We have finally found an inexpensive radiator that is a perfect fit. You may recall that our original radiator was a composite that we had custom made.

We have found that the Murray #433331 from O'Riley Auto parts is exactly the same as our original in shape, inlet & outlet, core size and header tank thickness. It also has a drain which will make coolant issues simple to deal with. One modification is necessary: cut off the little overflow nipple near the cap and plug it with an M6x10 screw. We tapped the hole in the nipple and used a little Permatex RTV sealant (for waterpumps, etc.). The radiator from O'Riley is only about $100.
Why would you cut the overflow nipple off instead of running that to your steam vent?
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Old 12-13-2016, 07:39 AM   #9
sgtskid
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Quote:
Originally Posted by Pootis View Post
Why would you cut the overflow nipple off instead of running that to your steam vent?
The steam tube needs to be under pressure. Venting to atmosphere would allow the coolant to boil off similar to running with your radiator cap off.
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Old 12-13-2016, 12:46 PM   #10
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Our steam vent is tied into the upper radiator hose. The little radiator nipple interferes with our intake duct .... we did not want to make a new duct. Also, the E30 de-gas bottle
has its own over flow vent.
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Old 12-13-2016, 12:52 PM   #11
Pootis
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Maybe that would explain why I don't get heat in my car currently
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Old 12-16-2016, 09:44 PM   #12
trucupey
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Thank you

SGTSKID, thanks for the picture and information. That's super helpful. Those hoses look great. I am picking up m up tomorrow. I got the radiator yesterday and am mounting it tomorrow.
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Old 12-17-2016, 12:00 PM   #13
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Here are the bottom mounts.
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Old 12-17-2016, 02:36 PM   #14
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Radiator

Here is the top
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Old 12-17-2016, 02:37 PM   #15
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Thank you all for your help.
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