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Old 16th May 2019, 02:33 PM   #1 (permalink)
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Question Power steering fluid cooler options

Hi guys,

I'm trying to get my car ready for a trip to the Ring and one of the things I came across while browsing the forum was that the PAS fluid has a tendency to get hot and even boil.

I see that Forge makes a cooler kit, but I haven't seen any from other manufacturers. I was also wondering about retrofitting a cooler from a different car. I found one that is for a few different VW group vehicles and they are relatively inexpensive (~£80). Looks like it should perform better than the OEM tube and fin cooler and possibly even the Forge?

Doesn't bar and plate reduce heat soak compared to tube and fin?

I'd also like to fit a temperature sensor somewhere and have some way of displaying the value...
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File Type: jpg s-l1600.jpg (36.6 KB, 0 views)
File Type: jpg FMGTR35PAS__16792.1459191315.jpg (16.6 KB, 1 views)
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Old 16th May 2019, 02:44 PM   #2 (permalink)
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Probably worth speaking to Iain Litchfield as he does lots of product testing at the Ring with a GTR, he will be able to tell you if a cooler is needed,
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Old 16th May 2019, 02:54 PM   #3 (permalink)
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Based on reading other drivers' experiences on here I have already accepted that I need an upgrade, for example:

https://www.gtr.co.uk/forum/460529-t...ml#post4815145
https://www.gtr.co.uk/forum/236514-p...ml#post2466946

Just looking to see what options are out there...
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Old 16th May 2019, 06:42 PM   #4 (permalink)
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Smile

Well, it turns out that when searching the net for power steering coolers, it is actually more helpful to search for transmission coolers instead...

I came across a couple of products by Mishimoto:

https://www.mishimoto.co.uk/automoti...html?limit=all
  • MMTC-U - Universal Transmission Cooler and Power Steering Cooler, ~£60
  • MSHMMTC-TF-1275 - Universal Transmission Cooler, ~£35.

They both have the same 3/8" push-on fittings, but after I measured the available space, I realised it would be a very tight fit horizontally for the MMTC-U. Perhaps this is why I have seen photos of them mounted diagonally.

The MSHMMTC-TF-1275 however will fit like a glove and is around half the price of the MMTC-U, much cheaper than the Forge offering, while being around twice its size and roughly three times the size of the OEM part. No boiling steering fluid ruining my trip to the Ring! Should one worry that its name does not include power steering? Not according to the description:

Quote:
Mishimoto universal fluid coolers are applicable for use with transmission fluid, engine oil, power steering fluid, and a variety of other automotive fluids.
They also come with the exact same items in the box.

I don't think either of these products will fit with a full-size race intercooler, but with the stock IC this is no problem. For only £35, I'm happy to revisit in the future if I ever need the space.

From what I have read, while a bar and plate cooler is more effective, it also more restrictive, so putting one directly in front of the radiator is possibly not a good idea. Having said that, I think most FMIC are bar and plate, so meh.

In terms of fitment, I reckon I can modify the OEM cooler brackets to fit the new cooler, possibly having to drill some new holes, but that's about it.

I'll upload pics post-install.
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File Type: jpg mshmmtc-tf-12751.jpg (24.8 KB, 6 views)
File Type: jpg mshmmtc-tf-12752.jpg (20.7 KB, 6 views)
File Type: jpg mshmmtc-tf-12753.jpg (9.4 KB, 6 views)
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