Hey guys. I've been really busy the last month or so. But, I've got the 6.9 crew cab completely torn down and at the machine shop as I type this. It should be ready to pick up next week.
A few guys already know this, but I wanted to share with you all why my headgaskets keep failing on the #1 cylinder. The blocks deck was warped around the #1 cylinder. It needed 7 thousands to get the block flat and square with the crank center line again. The bores are fine and only needed honing..... not an over-bore. The crank and cam are great as well. The heads are supposed to be fine as well, but I'm always worried about a missed crack.
To compensate for the lower deck on the block, I ordered a set of Mahle pistons with the wrist pin 10 thousands higher on the piston. They were specifically made for decked blocks. When used with a standard deck height, the compression ratio will be lowered to 19.7:1. With my milled deck, the compression ratio will not change much.
I decided to go with Hypermax rod and main bearings. They are supposed to be an upgrade to the usual offerings........ we'll see. When time and cash allow...... I'm sending Russ my cam for a regrind. I'm also getting the rotating assembly balanced from the harmonic damper all the way to the flywheel............ AND OF COURSE, A MOOSE PUMP AND MOOSE INJECTORS!!!
I know it sucks without photos, but I hope to have some loaded up this weekend.
Heath
A few guys already know this, but I wanted to share with you all why my headgaskets keep failing on the #1 cylinder. The blocks deck was warped around the #1 cylinder. It needed 7 thousands to get the block flat and square with the crank center line again. The bores are fine and only needed honing..... not an over-bore. The crank and cam are great as well. The heads are supposed to be fine as well, but I'm always worried about a missed crack.
To compensate for the lower deck on the block, I ordered a set of Mahle pistons with the wrist pin 10 thousands higher on the piston. They were specifically made for decked blocks. When used with a standard deck height, the compression ratio will be lowered to 19.7:1. With my milled deck, the compression ratio will not change much.
I decided to go with Hypermax rod and main bearings. They are supposed to be an upgrade to the usual offerings........ we'll see. When time and cash allow...... I'm sending Russ my cam for a regrind. I'm also getting the rotating assembly balanced from the harmonic damper all the way to the flywheel............ AND OF COURSE, A MOOSE PUMP AND MOOSE INJECTORS!!!
I know it sucks without photos, but I hope to have some loaded up this weekend.
Heath
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