Oil Colooer Bypass - Ford Powerstroke Diesel Forum
6.0L Performance Parts Discussion What has or has not worked for you?

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post #1 of 11 Old 10-17-2019, 01:16 PM Thread Starter
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Oil Colooer Bypass

How many of you guys have done an actual Oil Cooler Bypass? Who did you use and can you attach a link to this post? I have searched and i can find adaptations and filter bypasses but I would like to get away from the internal oil cooler. Thanks in advance.
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post #2 of 11 Old 10-17-2019, 05:35 PM
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Can't picture how you would do what you're asking for. It's all internal and would require some engineering. https://www.bulletproofdiesel.com/BP...heavy-duty.htm. I'm sure you've heard of this and I'm misunderstanding your question.

I have an BPD external air cooled oil cooler, but that is the only way I can think of a bypass.

I've seen a smaller external cooler, but it is way to small to cool the 50,000 BTUs needed. It may be for extreme performance mods that need extra cooling. The one I saw specifically for the 6.0 was for Maryland Performance Diesel, but that was not bypass, but supplemental.

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post #3 of 11 Old 10-17-2019, 06:40 PM
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Originally Posted by hlg0607 View Post
How many of you guys have done an actual Oil Cooler Bypass? Who did you use and can you attach a link to this post? I have searched and i can find adaptations and filter bypasses but I would like to get away from the internal oil cooler. Thanks in advance.
Trust your oil cooling to BPD! Any of their options is an improvement over the stock cooler IMHO.

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post #4 of 11 Old 10-18-2019, 02:57 AM
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When people figure out the oil cooler isn't the problem then switch their coolant you see the big picture.



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post #5 of 11 Old 11-02-2019, 05:18 PM
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I’ve installed lots of bpd kits and a few mpd kits.. I have a bpd kit on my wife’s excursion.... I highly recommend *against* and air/oil cooler by itself. The factory one works MUCH better. With their larger cooler in my wife’s truck the coolant stays around 200 when it’s 110* outside but the oil temp soars up to 235-240 EMPTY. Even when it’s 40* ambient temps I still see oil temps approx 7* higher than coolant temps.. we don’t tow with this truck. It’s got way more fuel than air and I have my truck so I couldn’t tell you temps when loaded down.

I built my own air/oil kit for my 6.7, but made it a secondary cooler instead of deleting the factory cooler. My oil temps on my 6.7 used to be 10-15* higher when empty (normal for a 6.7) and up to a 30* split when towing, (also normal) after adding another cooler, I’ve yet to see oil temps higher than my coolant temp. It usually runs 194-200 coolant and 180-190 oil temps.

Point to this is that an air to oil cooler by itself is not enough. The factory cooler simply works much better in a 6.0 application. If you want an aftermarket oil cooler, I’d run one that allows you to keep the factory cooler in the valley.

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post #6 of 11 Old 11-03-2019, 05:39 AM
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When people figure out the oil cooler isn't the problem then switch their coolant you see the big picture.


What coolant are you running?

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post #7 of 11 Old 11-03-2019, 05:53 AM
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Originally Posted by Nickjames525 View Post
I’ve installed lots of bpd kits and a few mpd kits.. I have a bpd kit on my wife’s excursion.... I highly recommend *against* and air/oil cooler by itself. The factory one works MUCH better. With their larger cooler in my wife’s truck the coolant stays around 200 when it’s 110* outside but the oil temp soars up to 235-240 EMPTY. Even when it’s 40* ambient temps I still see oil temps approx 7* higher than coolant temps.. we don’t tow with this truck. It’s got way more fuel than air and I have my truck so I couldn’t tell you temps when loaded down.

I built my own air/oil kit for my 6.7, but made it a secondary cooler instead of deleting the factory cooler. My oil temps on my 6.7 used to be 10-15* higher when empty (normal for a 6.7) and up to a 30* split when towing, (also normal) after adding another cooler, I’ve yet to see oil temps higher than my coolant temp. It usually runs 194-200 coolant and 180-190 oil temps.

Point to this is that an air to oil cooler by itself is not enough. The factory cooler simply works much better in a 6.0 application. If you want an aftermarket oil cooler, I’d run one that allows you to keep the factory cooler in the valley.
My temps from an air cooled oil are about 30 cooler than you mentioned. I never saw 235 EOT unless I was towing 11k up a 6% slope, at 110 outside temp. I've since installed a 7.3 mechanical fan clutch, and it now won't break 200 EOT flat and level, and up a hill at 110 outside temp I see 210 or maybe 215 EOT. I suspect the ex has something else going on.

I don't necessarily disagree with you about Air cooled oil cooler being the be all end all. If I had a truck that needed an oil cooler, I'd consider it. If not, I'd leave the factory in.
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post #8 of 11 Old 11-03-2019, 06:02 AM
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@ Deer Creek: At the time it was Fleetrite ELC. https://www.fleetrite.com/parts/part...Name=FLTUELCCG



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post #9 of 11 Old 11-03-2019, 08:42 AM
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I had my factory cooler changed out again due to blown HGs. I only have about 20 thousand miles on it but the temps showed it was restricted. I also ended up buying the fitting so I could backflush the oil cooler after seeing high deltas with the new cooler. The shop said they did a coolant flush but my new cooler was restricted right away. I was able to get a ton of garbage out of the cooling system and now it's like it should have been new. You might want to consider trying a backflush and keep stock cooler.
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post #10 of 11 Old 11-03-2019, 08:50 AM
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People tend to have issues after installing a new oil cooler.....when they forget to replace the tstat as well.



The old tstat will fail Open making it seem like there is a delta condition still happening. Which was their original problem to begin with....a failed tstat all the while they did all the work to replace an oil cooler. Aim small, miss small......



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