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Posted by: tornik550 Mar 8 2015, 04:12 PM

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.

Posted by: tornik550 Mar 8 2015, 04:18 PM

It appears the stock coolers are available however very expensive.

Posted by: tornik550 Mar 8 2015, 04:35 PM

Also- can I remove the oil cooler with the engine in the car?

Posted by: patssle Mar 8 2015, 05:44 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!

Posted by: GeorgeRud Mar 8 2015, 06:26 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.

Posted by: larryM Mar 8 2015, 07:05 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

Posted by: bcheney Mar 8 2015, 07:26 PM

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.

Posted by: patssle Mar 8 2015, 08:15 PM

Some suggest AN-16 for supply. I used it on mine and it certainly doesn't hurt anything!

Posted by: GeorgeRud Mar 8 2015, 08:20 PM

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.

Posted by: brant Mar 8 2015, 09:22 PM

Needs to be 16


I prefer welded but have seen clamped versions.

Posted by: t collins Mar 8 2015, 09:31 PM

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

Posted by: Maltese Falcon Mar 8 2015, 11:01 PM

+1

Posted by: sixnotfour Mar 9 2015, 01:13 AM

-12 will be fine, for street use.

Posted by: Mark Henry Mar 9 2015, 08:25 AM

I agree the cooler chokes down to just over .600 as it enters the engine even on the 3.2

Posted by: GeorgeRud Mar 9 2015, 11:35 AM

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.

Posted by: earossi Mar 9 2015, 07:46 PM

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.

Posted by: McMark Mar 9 2015, 09:18 PM

http://www.914world.com/bbs2/index.php?showtopic=223639

Posted by: 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.

Posted by: brant Mar 9 2015, 10:14 PM

Nice.

Dirty, used coolers are dangerous. Some throw used coolers from grenade motors away. Others do not.

Posted by: Perry Kiehl Mar 10 2015, 12:34 PM

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.

Posted by: Mark Henry Mar 11 2015, 09:47 AM

He is what I'm thinking of doing
This is a aluminum 1"NPT 90* elbow. It cost $7. at Princess Auto which is like or may even be a Canadian division of Harbor Freight. They sell a lot of the same stuff.

This made for a diesel refueling station or on-site fuel transfer set up.
http://www.princessauto.com/en/b/all-seasons/seasonal/rural/fuel-transfer/tanks-components/N-u9y09k?No=15&Nrpp=15


Attached image(s)

Posted by: Mark Henry Mar 11 2015, 09:52 AM

The 1st pic is a size comparison.
2nd pic is how it would look welded on the cooler. This would give me 1"NPT female connector.


Attached image(s)

Posted by: Mark Henry Mar 11 2015, 09:57 AM

Another option would be to put it on the other way.
This would in fact, once the tube is cut down, will slip over the cooler tube and give me a 1"NPT male connector.


Attached image(s)

Posted by: Mark Henry Mar 11 2015, 10:01 AM

dp

Posted by: JStroud Mar 11 2015, 09:19 PM

I'm working on modifying my cooler now, I've got it setup to clear the valve cover, but not sure about the clearance to the suspension, don't have my engine ready to go in the car yet.

Anyone have a modified cooler in a car they could take a picture or measure the distance from the cooler to the suspension.

Thanks

Posted by: McMark Mar 11 2015, 09:29 PM

You didn't like my pictures.

Posted by: JStroud Mar 11 2015, 09:49 PM

They were fine, I think I got the centerline of the AN fitting setup a little past the end of the cooler, just wanted to verify if it will have clearance to the suspension, or if I need to change it before I get it welded.

Posted by: Jeff Hail Mar 11 2015, 09:53 PM

With a 90 tucked close to the cooler you should not have any clearance issues.

Remember you can steer/ aim the 90 pretty much in any configuration. Up, down, forward, aft.

Add a second 90 or two 45s and you will have a very maneuverable Snuffleupagus to put it just about any direction you can imagine.

Posted by: JStroud Mar 11 2015, 10:13 PM

Here's what it looks like now......weld or move in?






Thanks

Posted by: Jeff Hail Mar 11 2015, 10:26 PM

That's pretty good. Make sure you have clearance for the female connector.

Posted by: McMark Mar 13 2015, 12:34 PM

Looks good. Mount it on the engine and make sure the cover comes off without hitting.