Blowing on nos test run
Thread Starter
Staging Lane
Joined: Apr 2009
Posts: 67
Likes: 0
From: TEXAS
Blowing on nos test run man right now im really depressed dam it well i need some advice i just had ls6 799's heads put on my car shop just called me said it broke 
so i need help find out if it is my heads, or just not torqued down enough the heads are cnc ported flow about 310cfm and are milled .20 stock valves
u can see on my sig.. what other stuff i have well he tuned it for motor ran fine then when he juiced it he said after it idled down it started clattering bad and water n oil mixed he thinks maybe a water jacket blew so i called the guy that sold me the heads and he claims no way it could of be that he thinks it lifted a head he asked what they were toqued down to that he should of torqued em down to 90pounds so i call the shop where the car is at he said he torqued them at 80 is that a big difference could it have been that? theirs no hole in my pan and it will still run just knocking and clattering any idea what could of happened if that is even possible to lift a head??? help me please
so i need help find out if it is my heads, or just not torqued down enough the heads are cnc ported flow about 310cfm and are milled .20 stock valvesu can see on my sig.. what other stuff i have well he tuned it for motor ran fine then when he juiced it he said after it idled down it started clattering bad and water n oil mixed he thinks maybe a water jacket blew so i called the guy that sold me the heads and he claims no way it could of be that he thinks it lifted a head he asked what they were toqued down to that he should of torqued em down to 90pounds so i call the shop where the car is at he said he torqued them at 80 is that a big difference could it have been that? theirs no hole in my pan and it will still run just knocking and clattering any idea what could of happened if that is even possible to lift a head??? help me please
Launching!
Joined: Jun 2009
Posts: 284
Likes: 0
From: Bahrain
Yup Ptv & flycutting ... It was the shops fault anyways that he didn't take the time to measure =s ... Was a professional handling your install .. Otherwise the garage must stand responsible for the failure ... Well torqued -10 theory - Experts please chime in ^^ =( damn sorry for your lose !!
Thread Starter
Staging Lane
Joined: Apr 2009
Posts: 67
Likes: 0
From: TEXAS
THANKS FOR THE INFO everyone that wrote on here, but sorry i forgot to say they are dish pistons with valve reliefs but i went to his shop yesterday and heard it my self very loud tap noise sorta like if it is piston slap not sure though cause when u idle it the loud tap knock noise goes away and u can definitely tell its on passenger side front first piston u can put your hand on the front the pass. head an feel the tapping just wierd that it goes away when u give gas well he is gonna stick a camera down in their through spark plug hole to see if the piston looks damaged if not hethiks maybe cam bolt broke or bearing idk
Check the pushrods for straightness, check for broken valvesprings, damaged plugs. I would guess that when the heads were done, the holes weren't blown out completely, and it cracked the block. Unless it's detonating bad, it definately won't lift the heads. What was the AFR and timing during the nitrous run?
Thread Starter
Staging Lane
Joined: Apr 2009
Posts: 67
Likes: 0
From: TEXAS
check the pushrods for straightness, check for broken valvesprings, damaged plugs. I would guess that when the heads were done, the holes weren't blown out completely, and it cracked the block. Unless it's detonating bad, it definately won't lift the heads. What was the afr and timing during the nitrous run?
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Staging Lane
Joined: Apr 2009
Posts: 67
Likes: 0
From: TEXAS
Thread Starter
Staging Lane
Joined: Apr 2009
Posts: 67
Likes: 0
From: TEXAS
