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  #21  
Old October 10th, 2012, 03:55 PM
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barry f
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I don't have AC in my truck. I thought about the air in the system but no signs of it. The system was bled a year ago with the recore. All hoses seem okay. All were replaced with the recore.

It's at the shop now.
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  #22  
Old October 10th, 2012, 04:12 PM
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Originally Posted by bjf View Post
All hoses seem okay. All were replaced with the recore.

It's at the shop now.
The question is whether the hoses stay firm (indicating that the system holds pressure) or not. If not, find the leak -- could be water pump, could be cap, could be a lot of things.
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  #23  
Old October 10th, 2012, 04:14 PM
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Originally Posted by evilfij View Post
The question is whether the hoses stay firm (indicating that the system holds pressure) or not. If not, find the leak -- could be water pump, could be cap, could be a lot of things.
Stay firm and appear to hold pressure. Doing another pressure test now. Water pump shows no sign of failure.

Cap?
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  #24  
Old October 10th, 2012, 04:31 PM
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Cap on overflow tank, when they fail they stop holding pressure.

Signs are starting to point to head gaskets as you are eliminating everything else, but who knows.
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  #25  
Old October 10th, 2012, 04:39 PM
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Yeah not sure. The shop finds it hard to believe the head gasket is leaking because they can't even get the truck to run warm and with the tests they have done but will know more after they screw around with it some more.
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  #26  
Old October 10th, 2012, 09:37 PM
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Replace the gauge and check grounds. Mine does funny things at times, its a VDO using factory wiring.
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  #27  
Old October 15th, 2012, 03:08 PM
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Any adverse affects of running a 82 degree
T stat? Ordered one to see if that will solve the issue.
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  #28  
Old October 15th, 2012, 04:18 PM
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Quote:
Originally Posted by bjf
Any adverse affects of running a 82 degree
T stat? Ordered one to see if that will solve the issue.
The ECU may throw in extra fuel to get the engine up to operating temp at 89 degrees. This is just masking the problem not fixing it. Did you inspect the plugs?
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  #29  
Old October 15th, 2012, 04:48 PM
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Yeah there is no evidence of a head gasket leak. Plugs look fine. If the plugs were getting washed clean i would be loosing coolant and i am not. Honestly I can only get it to run warm on one stupid hill.

------ Follow up post added October 15th, 2012 01:50 PM ------

I saw that one guy with a new 4.6 in the 110 did the cooler t stat and his issue was gone.
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  #30  
Old October 15th, 2012, 04:59 PM
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Quote:
Originally Posted by leastonce View Post
The ECU may throw in extra fuel to get the engine up to operating temp at 89 degrees. This is just masking the problem not fixing it.
I agree.

Barry, what RPMs are you hitting when you're going up this hill?
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  #31  
Old October 15th, 2012, 05:55 PM
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Nothing crazy. It really only does it when I sit at top of hill idling
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  #32  
Old October 15th, 2012, 09:22 PM
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I have wondered about running these engines at 180, I have been running my truck for a few years with this tstat with no issues. My head gaskets leak but I don't seem to have overheating issue with the new radiator.
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  #33  
Old October 15th, 2012, 10:34 PM
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If I do a head gasket is it worth doing a valve job too?
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  #34  
Old October 16th, 2012, 01:06 AM
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Yes on the valve job and just spend $900 on aluminum radiator at Dan's place in Long Island City, NY.

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If I do a head gasket is it worth doing a valve job too?
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  #35  
Old October 16th, 2012, 01:10 AM
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Ha because I want to spend 900 on top of everything else. Too bad head gaskets arent cheap. This would be easier for sure.
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  #36  
Old October 16th, 2012, 06:19 AM
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They are about 50$ then another 300-400 on the heads maybe 200 on other misc gaskets hose bolts. You can do it for 600-700 with some sweat equity. Its an easy project a little time consuming att first. The hardest part is removing the PS pump and reinstalling the Y-pipe.
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  #37  
Old October 16th, 2012, 06:49 AM
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Why would one remove the y pipe to do heads? I leave the manifolds on the y pipe.
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  #38  
Old October 17th, 2012, 06:02 PM
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So I should have started with this but I waited to change t stat. When the shop pulled my current one you can see it was jacked. Threw a new 88 degree one in and drove around. It is about 95 here today. All was good in normal traffic and even when I climbed up the hill that seems to screw it up. When I got to the top though, parked nose up and let it run for five minutes the temp climbed. I don't overheat but it gets 3/4 of the way up there. I drove back down the hill and did it again. Temp stays in the middle on the climb and when I park it runs warm after five minutes of idling. I did it a third time but parked nose down and it took ten minutes to start to get warm. I don't mind doing the head gaskets but I just wanted a clear answer first. You would think a jacked t stat would do it.
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  #39  
Old October 17th, 2012, 06:09 PM
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I would not bet on Headgaskets. I would think bad radiator or fan clutch or waterpump or not holding pressure or air bubble or something given what you are describing.

At this point I would swap in the 82 degree t-stat and see what happens.

HGs normally don't fix themselves so it will probably get worse if it is them and unless you have hydrocarbons in the coolant (you did test this right?) I would not do them.
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  #40  
Old October 17th, 2012, 08:45 PM
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Talked to shop. They claim they bled it correctly but are willing to do it again with a tool that sucks the air out. At this point I have rage. Going to drive marks 90 on same hill tomorrow to see what it does.
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