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Message: [QUOTE="nitrogen here 2, post: 218064, member: 1120"] The head bolts stretch because the coolant entering the compression raises cylinder combustion pressures so high that it surpasses the TTY bolt tolerances. Now if the heads were flat, you would have to work the truck DAMN HARD to stretch a head bolt. so what you are trying to say is that they were already leaking coolant, even before the bolts stretched. first off I call BS on that secondly then according to your theory i should be good to do 1 stud at a time because in 115,000 miles mine has never used a drop of coolant EVER. therefore my HG's and bolts are just like new lot of things can cause excessive cylinder pressure. like cranking up the fuel, like cranking up the timing. like heavyload/heavy acceleration while still cool enough to get a delay in fuel ignition. any one of them can result in an astronomical spike in cylinder pressure. used to see it all the time on chevy 6.2's except there the weak link wasn't the HG, it was the head itself [/QUOTE]

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