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> /6 conversion oil coolers and oil cooler modifications
tornik550
post Mar 8 2015, 04:12 PM
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I just started to install my /6 for the first time. I have the trailing arms off my car so I didn't notice at first that I will probably have a clearance issue. I didn't realize that 911 and 914/6 have slightly different oil coolers.

It appears that stock 914/6 oil coolers are NLA.

I have seen several posts about oil cooler modifications.

What are my options for a /6 oil cooler that will clear the trailing arm?

What is the cheapest option?


FYI- I don't think it matters here however I do have a front oil cooler also.
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tornik550
post Mar 8 2015, 04:18 PM
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It appears the stock coolers are available however very expensive.
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tornik550
post Mar 8 2015, 04:35 PM
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Also- can I remove the oil cooler with the engine in the car?
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patssle
post Mar 8 2015, 05:44 PM
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http://www.914world.com/bbs2/index.php?showtopic=4319

That guy will modify it for you. Just specify what type of fitting you want welded on!
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GeorgeRud
post Mar 8 2015, 06:26 PM
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Have the cooler modified with the AN-12 fitting and you should be good to go. Be sure to put a fitting into your line from the cooler to the oil tank so you can easily change the oil.
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larryM
post Mar 8 2015, 07:05 PM
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I have a good used, pressure tested, original 914-6 cooler FS - $500

Armando has had one FS on eBay periodically

check eBay for others
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bcheney
post Mar 8 2015, 07:26 PM
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QUOTE(larryM @ Mar 8 2015, 08:05 PM) *

I have a good used, pressure tested, original 914-6 cooler FS - $500

Armando has had one FS on eBay periodically

check eBay for others


That is a pretty decent price for a pressure tested original 6 cooler. I have a 911 cooler modified by Rich Johnson and I had it ultrasonically cleaned by a shop in Indy prior to installing in my six conversion.
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patssle
post Mar 8 2015, 08:15 PM
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QUOTE(GeorgeRud @ Mar 8 2015, 04:26 PM) *

Have the cooler modified with the AN-12 fitting and you should be good to go. Be sure to put a fitting into your line from the cooler to the oil tank so you can easily change the oil.


Some suggest AN-16 for supply. I used it on mine and it certainly doesn't hurt anything!
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GeorgeRud
post Mar 8 2015, 08:20 PM
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If possible, AN-16 is certainly an excellent idea. Just have to check the availability of metric to AN-16 adapters to join up with the oil tank.
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brant
post Mar 8 2015, 09:22 PM
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Needs to be 16


I prefer welded but have seen clamped versions.
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t collins
post Mar 8 2015, 09:31 PM
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I cut the threads off the AN -16 to 3/4" NPT, bored it out to fit the shortened tube, had it welded on and added the -16 x 90* swivel

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Maltese Falcon
post Mar 8 2015, 11:01 PM
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QUOTE(brant @ Mar 8 2015, 08:22 PM) *

Needs to be 16


I prefer welded but have seen clamped versions.


+1 (IMG:style_emoticons/default/smile.gif)
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sixnotfour
post Mar 9 2015, 01:13 AM
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-12 will be fine, for street use.
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Mark Henry
post Mar 9 2015, 08:25 AM
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QUOTE(sixnotfour @ Mar 9 2015, 03:13 AM) *

-12 will be fine, for street use.

I agree the cooler chokes down to just over .600 as it enters the engine even on the 3.2
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GeorgeRud
post Mar 9 2015, 11:35 AM
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If you can't find them elsewhere, Batinc.net in Sarasota, Florida has the appropriate metric to AN adapters, though I think they're available from all the usual sources. My conversion has been running -12 lines with a front cooler and I have not noted any oiling problems or excessive temps.
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earossi
post Mar 9 2015, 07:46 PM
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QUOTE(patssle @ Mar 8 2015, 06:44 PM) *

http://www.914world.com/bbs2/index.php?showtopic=4319

That guy will modify it for you. Just specify what type of fitting you want welded on!


Send the cooler off your 911 motor to a914guy (Rich Johnson) and he will have it modified to work in a 914. He can do metric or AN fittings. Also, talk to Rich about his rear mounted auxiliary oil cooler installation. I just did that mod to my /6 conversion. It's a great alternative to the factory solution of putting a cooler in the front trunk and then routing all the interconnecting piping through the body of the car. The small cooler mounts in the engine bay with short hoses connecting it to the engine.
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McMark
post Mar 9 2015, 09:18 PM
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How I did mine... (and few others)

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campbellcj
post Mar 9 2015, 10:08 PM
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I'm pretty sure I have an aftermarket/repro -6 cooler on my current setup. It was cheaper brand-new than a 45 year-old factory -6 or even modified 911 Behr. Goes to AN fittings and -12 lines as with others mentioned above.
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brant
post Mar 9 2015, 10:14 PM
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QUOTE(campbellcj @ Mar 9 2015, 10:08 PM) *

I'm pretty sure I have an aftermarket/repro -6 cooler on my current setup. It was cheaper brand-new than a 45 year-old factory -6 or even modified 911 Behr. Goes to AN fittings and -12 lines as with others mentioned above.




Nice.

Dirty, used coolers are dangerous. Some throw used coolers from grenade motors away. Others do not.
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Perry Kiehl
post Mar 10 2015, 12:34 PM
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I'd add to what Brant posted, never ever use a questionable oil cooler. There used to be a place called Southwest Cooler, that could untrasonically clean and pressure test oil coolers, but I don't have the address anymore.

If the car being converted is going to use AN fittings, then I use a later model cooler with the large tube, cut it off flush with the bracket on the end, and then tap it for 3/4" NPT and install a 90* elbow with -12AN on one side and NPT on the other. The only trick to this is you want the fitting to point down about 12*, so you need to to take care when you tap the tube so the fitting bottoms out at the correct position.
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