I am posting this hoping my experience can maybe help save others the $$ this cost me. As some know i lifted 5 cups the last time out, well after fixing all the cups and installing new tips i went to fire the truck up last weekend to get ready for some local testing .............. truck would not start and was just smoking white, pulled engine immediately and after removing the heads found out why, the lifting of the cups caused no damage really, but blowing all the water out mid track and not lifting caused the engine to over heat , temps got so hot it melted the cylinder head and actually blew a quarter sized hole in the head between the injector cup and the valve :baby: , and the molten aluminum floating around ended sticking on top of the piston also.
Sent the engine back to machine shop Monday to be further inspected and after tear down Randy found that the heat also cause the failure of 2 pistons, not the tops of them like you would think but from them expanding in the bore too much I think , wont know until i get them back, the block was damaged from the same action.
I am putting a temp engine together with another block and stock cut and coated pistons and the rest of the parts from this motor to finish out the year and will get the forged pistons back in over the winter along with some other changes , hope fully the Billet hold downs are enough to make sure they hold this time , if the billet hold downs do not hold either we have a few fix's to work with but they would have to be done over the winter when i can be down longer , hoping to have it back up and ready to run in 2-3 weeks . I wanted to share this as I had no clue is was possible to cause so much carnage from lifting a cup at high HP , normally at lower power levels it is no biggie and had no issue using stock holds downs all last year hopefully this can save some one else the same failure. I dont even dare figure out cost per pass
Sent the engine back to machine shop Monday to be further inspected and after tear down Randy found that the heat also cause the failure of 2 pistons, not the tops of them like you would think but from them expanding in the bore too much I think , wont know until i get them back, the block was damaged from the same action.
I am putting a temp engine together with another block and stock cut and coated pistons and the rest of the parts from this motor to finish out the year and will get the forged pistons back in over the winter along with some other changes , hope fully the Billet hold downs are enough to make sure they hold this time , if the billet hold downs do not hold either we have a few fix's to work with but they would have to be done over the winter when i can be down longer , hoping to have it back up and ready to run in 2-3 weeks . I wanted to share this as I had no clue is was possible to cause so much carnage from lifting a cup at high HP , normally at lower power levels it is no biggie and had no issue using stock holds downs all last year hopefully this can save some one else the same failure. I dont even dare figure out cost per pass
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