7.3 IDI head gaskets....... - Ford Powerstroke Diesel Forum
7.3L IDI (Non-Powerstroke) Diesels Technical discussion of topics related to vehicles powered by the 7.3 Liter In-Direct Injection Navistar engines.

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post #1 of 11 Old 11-01-2010, 05:48 AM Thread Starter
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7.3 IDI head gaskets.......

Has anyone every done them? Should I shoot myself now?
I'm loosing coolant and do not see a leak at all....... however coolant / oil is not contaminated at all.

wishfull thinking, I did fill my cooling system with just water wonder if its evaporating?
The one place I get my coolant from was out of stock and I haven't made it back to see if they have more.

1993 f-350 7.3IDI
1967 F-100 352
1958 Pan Head Ground up built NOT BOUGHT

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post #2 of 11 Old 11-09-2010, 04:17 AM
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Unfortunately there are other reasons for loosing coolent. I've had two motors with porosity in the block, no mixing of fluids, but coolent was being burnt and sent out the exhaust.. Thinking the the problems on the first was head gaskets, we tore the motor apart to not find anything wrong with the gasket. Put the motor back together with new gaskets and a fresh set of heads we had and was still blowing white smoke. Ended up putting in a new motor. Second time it happened on another truck we just bought, we pulled the heads and found nothing wrong with the gaskets on that one either, we just pulled it and put in another motor. I hope this isn't what wrong with yours.
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post #3 of 11 Old 11-09-2010, 06:29 AM Thread Starter
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After pressure testing the cooling system I found that once pressure built in the system it was blowing a mist out of a tiny leak in the radiator.

1993 f-350 7.3IDI
1967 F-100 352
1958 Pan Head Ground up built NOT BOUGHT
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post #4 of 11 Old 11-09-2010, 06:36 AM
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That's great to hear, changing a radiator is a hell of a lot easier than a motor.
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post #5 of 11 Old 11-12-2010, 09:32 PM
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I pulled my engine to do headgaskets/head studs. Not a fun process

-Justin-
1985 Ford F-250 with a 6.9 IDI/T-19 4speed 4x4
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post #6 of 11 Old 11-19-2010, 05:50 AM Thread Starter
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Well the head gasket blew on me last night. I'm fixing it this weekend and its going to the road for sale. I'm done with this thing.

1993 f-350 7.3IDI
1967 F-100 352
1958 Pan Head Ground up built NOT BOUGHT
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post #7 of 11 Old 11-19-2010, 06:08 AM
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Are you sure it's a head gasket this time, what did it do?
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post #8 of 11 Old 11-19-2010, 09:45 AM Thread Starter
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The trunk running at idle is fine. Once I rev it to 1500 or so it Shoots out coolant from the back of the head where the head meets the block.

1993 f-350 7.3IDI
1967 F-100 352
1958 Pan Head Ground up built NOT BOUGHT
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post #9 of 11 Old 11-19-2010, 09:57 AM
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Sorry to hear that, it's a tough project, but not impossible. Make sure you have some strong friends or maybe a cherry picker, that damn head is heavy. What is the truck your working on, a 2wd or 4wd? I may be interested in it.
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post #10 of 11 Old 11-19-2010, 10:14 AM Thread Starter
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You mean this?
http://www.powerstroke.org/forum/tru...5s-4000-a.html

1993 f-350 7.3IDI
1967 F-100 352
1958 Pan Head Ground up built NOT BOUGHT
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