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Old 07-31-2012, 02:38 PM
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Could a clogged oil cooler cause.......

.....21 psi in the cooling system?

My oil cooler is clogged. Bad. Probably 100% clogged. Just ordered a BPD oil cooler and did some more troubleshooting to see what else needed to be fixed while we were in there. Yesterday we saw 21 psi in the degas bottle after flogging the truck for about 20 minutes on the stock tune. Puked some coolant too. ECT was around 197 and EOT was at 215 (I'll see a 30-40* delta when running 65 mph on the highway: ECT 205 and EOT 235-245).

Truck has an EGR delete (Gogo Stage 1) and head studs (heads were checked for flatness but not cracks before the install, and I'm confident the install was done correctly). Truck also has the updated degas cap.

So could a clogged oil cooler cause 21 psi and some puking?
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Old 07-31-2012, 02:40 PM
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Hmm

I wouldn't see how ,, but a very good question ,,
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Old 07-31-2012, 04:03 PM
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I can't see how either, but I'm hoping someone smarter than me will say, "Yeah, it could and here's how."

Otherwise, I'm doing studs. Again. FML.
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Old 07-31-2012, 04:43 PM
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try another gauge
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Old 07-31-2012, 06:16 PM
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Quote:
Originally Posted by 04krpsd View Post
try another gauge
Yah no kidding, 21 psi, your degas bottle should be singing like a tea kettle.


Sent from my Autoguide iPad app
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Old 07-31-2012, 06:28 PM
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Test was done using "borrowed" Ford diagnostic equipment. But I understand what you're saying.
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Old 08-01-2012, 01:20 AM
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Trust me if your oil cooler was leaking that bad to put 21 psi in your cooling system, not only would your degas bottle be whistling like a tea kettle but your coolant would be BLACK because your oil cooler would be DUMPING mass amounts of oil into it to over pressurize the system like that. I would be betting its head gaskets. Do the pressure test again and when its pressured up park the truck and see if it leaks down. If it does check the oil for coolant, and walk around the truck and start looking everywhere for leaks. If you can't find any external leaks your head gaskets are leaking and could possibly be verified by starting the truck and watching the exhaust for white smoke. (while the system is still under pressure) about 30 mins after you shut it down.
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Old 08-01-2012, 05:00 AM
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The cooler isn't leaking as far as I can tell. No oil in the coolant, and no coolant in the oil (just had a Blackstone oil analysis done and everything looked good). No white smoke under any conditions (driving, hot re-starts, cold start up's, etc).

What about a crack in the intake manifold? As mentioned, I'm running a GoGo Stage 1 (ported manifold with EGR delete) and wondering if one of the welds may have failed. I haven't tested for exhaust gasses in the coolant because that wouldn't tell me if it was because of the manifold or because of the head gaskets.

Just looking for all possible causes before I pull the heads, have them checked, and put studs on again.

Thanks, all, for the feedback.
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Old 08-01-2012, 08:27 AM
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I would have to agree with the blown HG's. When mine gave on me it never once smoked white, tea kettle whistle, puking, or any of the "normal" symptoms. The only clue that I got was at red-lights I could smell the sweet smell of coolant in the AC and I was losing coolant. I could not find any external leaks so I hooked up a gauge to the degas bottle and I could hit 18 psi pretty quick.
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Old 08-01-2012, 08:30 AM
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Oh and if you already have studs I believe that you can re-torque ARP studs like 3 or 5 times before you need to replace them. You will just need gaskets.
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