Pushed coolant on LQ4
11-12-2011, 03:08 PM
#1
Pushed coolant on LQ4
I'm seeing very small amount coolant dripping down block between 5 & 7,never seen before but truck has not been run in 2 weeks. Not sure if l'm noticing it because it has been sitting so long and not evaportating off block. I think I'm running to much timing for the amount of boost - no kr on logs. The heads have never been off/still running TTY's.
Could this go away if I back down the timing or are the bolts stretched and need replacing? Guessing the latter!
If they need to come off is this what I need for repair?
studs or bolts
ls9 gasket or just stick with lq4 gaskets - if going ls9 does it change the comp.?
Clean heads and block and put back together.
Could this go away if I back down the timing or are the bolts stretched and need replacing? Guessing the latter!
If they need to come off is this what I need for repair?
studs or bolts
ls9 gasket or just stick with lq4 gaskets - if going ls9 does it change the comp.?
Clean heads and block and put back together.
11-12-2011, 03:32 PM
#3
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I think you could delay inevitable failure but,do you really wanna risk another motor being hydrolocked.What year lq4 is it?Btw.My 4.8l leaked in the same spot when I lifted a head.
11-12-2011, 03:51 PM
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Douh! Was it sureshot that hydrolocked his procharged lq4 idk one of yous guys did.Jus play it safe keep driving to minumum till you get a chance to fix it.I agree bring the timing back a few degrees.
Last edited by SincalT/A; 11-12-2011 at 03:57 PM.
11-12-2011, 05:03 PM
#6
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If you think you might have lifted a head I would go ahead and order LS9 gaskets and ARP studs and fix it before any real damage happens. Time to make those ported 317's a reality 
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11-12-2011, 06:55 PM
#8
Sorry To Read this Russ, but im sure with just a little work you'll get it fixed.
I would use stock LQ4 gaskets.
There are 2 different gaskets for the LQ4 depending on year as i was told from SDPC, the 03 and earlier IIRC is different gasket from the later 03/04 LQ4's just so ya know.
When i got my 6.0 last year i put new stock gaskets and headbolts on since i changed the lifters before i installed it. No problems so far and i love to smash the go pedal!
I would use stock LQ4 gaskets.
There are 2 different gaskets for the LQ4 depending on year as i was told from SDPC, the 03 and earlier IIRC is different gasket from the later 03/04 LQ4's just so ya know.
When i got my 6.0 last year i put new stock gaskets and headbolts on since i changed the lifters before i installed it. No problems so far and i love to smash the go pedal!
11-12-2011, 10:05 PM
#9
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yes ls9 gaskets change your CR... IIRC they are .071 but even GM rely on them for a boosted application..