Thanks for the info. Are the FEL-PRO 8726PT gaskets the good ones everyone is using? I thought there was a blue Felpro gasket that was being used, these seem to be grey. I am probably thinking of something else.
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Blown head gasket or something else?
- Thread starter Don-T
- Start date
Now I have another question. I was moving the heads around on my workbench taking sensors, block-off plates, injectors off and one of the pre-chambers fell out. I thought they were pressed in? It literally fell out on the bench. It came from the driver's side head, second from the back. I wonder if it was loose enough to allow for a leak to get around the sealing ring in the head gasket? That is the side the steady stream of small bubbles was coming from.
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- Las Cruces, New Mexico
Penetrant florescent dye and a pair of yellow shades is how we did this kind of inspection in aviation (looking for cracks).
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- Location
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I don't know anything about blue head gaskets. There is another part number for this truck from FEL-PRO that's a hundredth over-thickness for if you've had your heads milled. That P/N is FEL-PRO 9128PT
The pre-cups are supposed to be a light press fit. I have seen a center punch used to improve the fit of the cup. Pick two spots outside of the fire ring of the head gasket just outside of the precup bore and mark two indentations with the center punch. This will retain the precup.