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Old 05-10-2013
rodthejeepman777  rodthejeepman777 is offline
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Default Oil cooler bypass 2.7 crd wj

as previously, i have blown 2 oil coolers i 18 months and decided to make a cooler bypass to prevent this from happening again, i believe this unit is more for heating up the oil in very cold climates rather than being used for cooling down the oil, as it is tucked in behind the timing case without any cooling airways and out of the air flow, But thats is just my opinion, Anyway i have built my first bypass and ready to bolt it on for testing, i have made the water return back to the block larger ,but left the 16mm restriction to keep the water flowing at the same rate to prevent any hot spots or cool spots, and the same with the oil gallerys to keep the oil pressure the same , i have already started my second design,which will have a cooler adaptors fitted, here are a few pics ,

Hello not sure if these downloaded, if interested just drop me a email and i will send them to you ...Happy to help fellow Jeepers ...Thanks Rod

thesourceror777@bigpond.com

Last edited by rodthejeepman777; 05-10-2013 at 09:41 AM.
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Old 05-10-2013
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Pics? I haven't experienced any dramas with mine (yet..) but if this mod can prevent a problem then I for one, am interested. any plans to make a few more?
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Old 08-10-2013
rodthejeepman777  rodthejeepman777 is offline
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Default Bypass

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Originally Posted by SMBCJ View Post
Pics? I haven't experienced any dramas with mine (yet..) but if this mod can prevent a problem then I for one, am interested. any plans to make a few more?
Hi , do you have any pics of yours , if so I would love to see them, cheers rod ...thesourceror777@bigpond.com
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Old 09-10-2013
rodthejeepman777  rodthejeepman777 is offline
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Default Sorry I replied to the wrong thread.cheers mate

Quote:
Originally Posted by SMBCJ View Post
Pics? I haven't experienced any dramas with mine (yet..) but if this mod can prevent a problem then I for one, am interested. any plans to make a few more?
Hello SMBCJ, yes I have already started my second bypass, I am happy with the design, this one will have a external cooler , the only problem so far is the inside I.D of the oil cooler lines,as the oil gallery I.D of the2.7 is 16 mm which I want to run all the way to prevent any loss of oil pressure, I will have to cut and make the oil cooler intake pipes larger...cheers rod
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Old 09-10-2013
rodthejeepman777  rodthejeepman777 is offline
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Hello, I have fitted my new oil cooler bypass and am happy to say that it has great oil pressure, engine temp is perfect around a quarter on the guage, no leaks and everything works as usual, have driven to Brisbane to the Gold Coast and back , all is great ,very happy with result.....cheers
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Old 10-11-2013
rodthejeepman777  rodthejeepman777 is offline
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Hello again, last weekend I towed my 18 ft caravan up landcruiser mountain, the temp guage went to half way but did not overheat, but noticed the oil pressure did drop to a quarter on idle when temp was at half way,so I am definitely incorporating a external oil cooler on my second design, I think that should keep the oil a lot cooler, I think the original oil cooler, although it is running hot water through it and it is not getting any ventilation , but it must give the oil that little bit of cooling as the water temp is obviously cooler than oil temp under big load. I will let you know the results of my second cooler bypass...cheers Rod
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Old 10-11-2013
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Hi, the standard oil cooler does indeed cool the oil, it is a heat transfer unit that can both heat and cool the oil - depending on the ambient temperature. I'm not sure that I would bypass it without ensuring that the oil temperature stays within required operating limits (in both hot and cold conditions).
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Old 10-11-2013
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Rod very interesting, mine hasn't given any hassles but some pics would be great. If you can't get them to come up on the thread email them to me and I'll stick them up for you.
Missed your original post so been catching up.
Ian.............
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Old 15-02-2014
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The oil/coolant cooler has indeed a dual purpose.

Since its takes relative long get the oil up to operational temperatures and the coolant reaches its operational temperature quicker than the oil the coolant heats the engine oil during the start phase.

Don't get fooled by the small size of the heat exchanger. Coolant transfers heat 10x times faster than air.

The problem is the relative small temperature difference between oil and coolant. So adding an extra oil cooler is ok. By determining the position (before or after the coolant /oil cooler) you can adjust to the major climate.

Blowing the oil cooler indicates a serious problem!
The cooler must have a burst pressure rate of 10bar! Check your oil system. The relieve pressure valve should operate around 6.3bar!
Check this valve!
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