Replacing head studs one by one? - Ford Powerstroke Diesel Forum
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Old 04-06-2007, 04:34 AM
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Replacing head studs one by one?

As the title indicates, I'm wondering if there is adequate room to remove the stock head bolts and replace with head studs one-by-one to avoid pulling the heads and replacing the gaskets, etc. It sure would make the job easier and much quicker.

The reason I ask is that I have had the coolant tank "Dove-call" whistle going on for the last 5,000 miles and have lost about 1/2 quart of coolant in 9,000 miles. This might even be considered "normal" coolant-loss, but I would rather address this before the white smoke begins pouring out the exhaust. $600 in studs now sure sounds better than trying to get this thing warranteed later.

Mods:

SCT - Street tune. I have been towing on this, EGT's occasionally briefly touch 1100, then I back out. Sustained EGT's never surpase 1000 degrees.

Custom Intake

Custom 5" straight exhaust, 4" downpipe.

Truck runs and drives GREAT and I have 2000 miles of 8000lb towing next week.

Thanks,

-Cody
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Old 04-06-2007, 04:45 AM
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replacing those studs one at a time is not a good idea to try , you still will cause problems , then you will be replacing head gaskes ,i would replace the radiator cap, set colant level to the proper level which should be no higher than the minimum line and try that first , your coolant loss isnt bad at all, by the way if you see coolant coming from the exhaust it isnt the head gaskets on this engine it will be the egr cooler , head gaskets will push it out the reservoir 99 out of 100 times
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Old 04-06-2007, 05:41 AM
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Thank you for the prompt response! I've done the one-at-a-time stud swap on some gasser motors with great success, but this is no gasser.

I'll purchase the replacement coolant cap when I pick up some fuel filters this week(I don't think they have been changed yet!).

I have a good friend that runs a large repair shop, maybe I can barter a custom 6" exhaust for his Cummins towards head-stud repair. I just don't have the time to dig into this myself right now if it involves a tear-down and several days of work.
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Old 04-12-2007, 04:44 PM
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what exactly is the "dove call"? i hear it everytime i lay in the throttle with my sct on street or looney.
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Old 04-13-2007, 03:15 AM
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Its caused by pressure excaping the coolant expansion tank cap which creates a "dove call" type whistle while under heavy load.

I believe the head studs are stretching slightly at this point allowing combustion pressure to enter into the coolant system? Or is it simply the coolant is being heated at a much quicker rate and it has to go somewhere?
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