head stud
Elder User
Joined: Mar 2004
Posts: 853
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From: Oregon
This is what I have been told by the local tech.
The stock Torque-yield bolts will work just fine as long as they are torqued properly. The bolts are designed to stretch when torqued properly and this will hold the heads tight. They are not supposed to stretch past the torque specs. Some of the early model trucks were not properly torqued and some of the bolts have been loose when replacing the HG's. The result of an improper torqued bolt is when the boost gets high enough the incorrect torqued bolts will stretch because they were never stretched properly in the beginning. Ford has a new torquing specs and from what I have been told as long as the head is within spec (flatness) they have never had to replace the gaskets again.
I may not of used the correct terminology but that is what I have been told.
The stock Torque-yield bolts will work just fine as long as they are torqued properly. The bolts are designed to stretch when torqued properly and this will hold the heads tight. They are not supposed to stretch past the torque specs. Some of the early model trucks were not properly torqued and some of the bolts have been loose when replacing the HG's. The result of an improper torqued bolt is when the boost gets high enough the incorrect torqued bolts will stretch because they were never stretched properly in the beginning. Ford has a new torquing specs and from what I have been told as long as the head is within spec (flatness) they have never had to replace the gaskets again.
I may not of used the correct terminology but that is what I have been told.
New User
Joined: Mar 2007
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Originally Posted by Enomra
This is what I have been told by the local tech.
The stock Torque-yield bolts will work just fine as long as they are torqued properly. The bolts are designed to stretch when torqued properly and this will hold the heads tight. They are not supposed to stretch past the torque specs. Some of the early model trucks were not properly torqued and some of the bolts have been loose when replacing the HG's. The result of an improper torqued bolt is when the boost gets high enough the incorrect torqued bolts will stretch because they were never stretched properly in the beginning. Ford has a new torquing specs and from what I have been told as long as the head is within spec (flatness) they have never had to replace the gaskets again.
I may not of used the correct terminology but that is what I have been told.
The stock Torque-yield bolts will work just fine as long as they are torqued properly. The bolts are designed to stretch when torqued properly and this will hold the heads tight. They are not supposed to stretch past the torque specs. Some of the early model trucks were not properly torqued and some of the bolts have been loose when replacing the HG's. The result of an improper torqued bolt is when the boost gets high enough the incorrect torqued bolts will stretch because they were never stretched properly in the beginning. Ford has a new torquing specs and from what I have been told as long as the head is within spec (flatness) they have never had to replace the gaskets again.
I may not of used the correct terminology but that is what I have been told.
Enorma, That sounds right, MIne must not have been properly torqued at the factory. Since the dealer was willing to install the ARP's, I thought it was worth the extra expense judging from all the recommendations and experienced dialog on this forum. Certainly, if they told me it would cancel my warranty I wouldn't have done it.
Postmaster
Joined: Apr 2004
Posts: 2,654
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From: Bossier City, LA
So far everything here is pretty accurate. IH did also have some surface flatness quality issues on heads as well as assembly line torquing issues. The only problem I have with retaining the warranty to please ford dealer by using the pasrts that failed once already is this.......
Why should I be faced with paying for this again (possibly, depending on how good the job was performed) out of warranty? Injectors, and turbos are not really all that hard to replace and the prices are coming down. However who wants to pull the cab off, or pull the motor to redo a repair that was given a half hearted attempt? Not me.
This is not meant as a slam to the techs or dealers, and it is really irrelevant weather the truck is modded or stock, as I know some guys who are stock that push their trucks way harder than I push mine tuned, due to the fact that the premis under which the truck was advertisd and sold. Warranty dollars bit Ford and IH, and because of that, the loyal customers who are on their second or 3rd truck get the shaft when it comes to (what I view as a very critical longevity repair/mod) a critical and time consuming repair.
Why should I be faced with paying for this again (possibly, depending on how good the job was performed) out of warranty? Injectors, and turbos are not really all that hard to replace and the prices are coming down. However who wants to pull the cab off, or pull the motor to redo a repair that was given a half hearted attempt? Not me.
This is not meant as a slam to the techs or dealers, and it is really irrelevant weather the truck is modded or stock, as I know some guys who are stock that push their trucks way harder than I push mine tuned, due to the fact that the premis under which the truck was advertisd and sold. Warranty dollars bit Ford and IH, and because of that, the loyal customers who are on their second or 3rd truck get the shaft when it comes to (what I view as a very critical longevity repair/mod) a critical and time consuming repair.
Postmaster
Joined: Apr 2004
Posts: 2,654
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From: Bossier City, LA
Tim the materials are a moot point from the h-11 versus the ARPs. It is how the fastner is torqued in this application that is the problem. (fastner creep and a bunch of other engineering math formulas and technical jargon) I have a solution to this problem, but it ain't a cheap one, and you must use studs for it to work. But it would torque the entire head evenly at one time, and perfect every time.
