Head gasket oops
Head gasket oops Don't know what happened really, LS9 gaskets on an L33. TC76 only running 7# on a conservative E85 tune. Passenger side head.
Everything else looks good so I'm just going to put new gaskets on (doing the driver's side just because) and see what happens.
Stopped driving it one day last week and heard water boiling. Temps in both HP Tuners (driver's side head) and analog gauge on passenger side head never went above 220 but they were higher than normal. Everything was good (180* solid) prior.
Everything else looks good so I'm just going to put new gaskets on (doing the driver's side just because) and see what happens.
Stopped driving it one day last week and heard water boiling. Temps in both HP Tuners (driver's side head) and analog gauge on passenger side head never went above 220 but they were higher than normal. Everything was good (180* solid) prior.
I'll check on timing. I'm running a base tune from a very reputable FI tuner. I do know that timing was conservative.
Plugs are BR7EFs gapped to .020. AFRs were right in the acceptable range. Heads were decked prior to installation.
I honestly am thinking improper install on the heads (meaning they could have lifted but probably not because of too aggressive of timing). I did follow ARPs instructions to a t but having never done it, there's definitely a chance I made a mistake.
I'm just guessing here obviously, I'll find out today after I put it together.
Plugs are BR7EFs gapped to .020. AFRs were right in the acceptable range. Heads were decked prior to installation.
I honestly am thinking improper install on the heads (meaning they could have lifted but probably not because of too aggressive of timing). I did follow ARPs instructions to a t but having never done it, there's definitely a chance I made a mistake.
I'm just guessing here obviously, I'll find out today after I put it together.
Trending Topics
.020 seems a little tight. a base tune on some boosted car (mine is one) is just enough of a tune to get the thing started. and moving down the road. slap a new set on it and get it some dyno chassis time and you may just find out where things went wrong. id check that cylinder head too to make sure its not warped.
LS1 Tech Stories
The Best V8 Stories One Small Block at Time
Gas Monkey Built a 6-Wheel Ferrari Testarossa With a Corvette LT4 Engine
Verdad Gallardo
7 Most Reliable High-Performance Engines GM Has Ever Built
Verdad Gallardo
Amazing '71 Camaro Restomod Is Modern Muscle Car Under the Skin
Verdad Gallardo
6 Common C5 Corvette Failures and What's Involved In Repairing Them
Pouria Savadkouei
Retro Modern Bandit Pontiac Trans AM Comes With Burt Reynolds' Autograph
Verdad Gallardo
Top 10 Greatest Cadillac V Series Performance Models Ever, Ranked
Pouria Savadkouei
Top 10 Most Powerful Chevy Trucks Ever Made!
Hennessey's New Supercharged Silverado ZR2 Has 700 HP
Verdad Gallardo
Coachbuilt N2A Anteros Is an LS2-Powered C6 Corvette In Italian Clothes
Verdad Gallardo You think it was an instalation error but it is a strange coinsidence that were it failed is a very common detonation failure area. was there any fluid pushed into the overflow before you had the failure? Anything weird about the way the level in the radiator stayed? No exterior coolant leaks?
I was just pointing that out not implying it was a direct cause. I know for a fact that a lot of people are running between 0.028-0.035 on the 5.3 motors. If it hasn't been blowing the spark out then great. Better tootight than too loose.
The head gasket failure reasons have all already been listed. He's tuning himself (major props) and as mentioned running on a base tune, so looking over some logs may be beneficial.
