anotheraznguy

iTrader: (1)

ok so this was over 4th of july weekend.
it was over 108 @ track
my water and oil temps kept creeping up at the track

at one point it maxed out my oil and water temp gauges at over 300 F

i pulled off track and there was no more coolant it was starting to spew out of overflow just straight steam.

dont know if it is a blown head gasket / warped block / warped heads / cracked block or heads.

so far the only thing i've done is a compression test

Front of Motor

190 190
180 190
180 170
190 190


i will be doing a leakdown test as well as pulling the heads off

but does anyone else have any ideas of what might be the issue or troubleshooting?

the 170 compression really isnt too bad considering its only 10% loss of compression so i am starting to get worried that it may be a crack in a cooling jacket.

i havent drained the oil yet cause i want to be able to continue testing but i will drain it shortly to look for chocolate milk.

anotheraznguy

iTrader: (1)

***update***

Just did a leakdown test however with the motor cold.
my gauge only shows 100 psi max so it was 100 psi input
Results are as follows

Front of motor

94 94
94 93
93 88
91 94

Now with the one with 88 psi, i tried to see if any air was coming out of the radiator but nothing was. however i believe w/ the thermostat closed i wouldnt see it anyways. is that the case or should i have been able to see air bubbles coming out of the radiator.

crainholio

iTrader: (2)

Good process thus far, next I'd grab the cooling system pressure tester from AutoZone (loan-a-tool) and pop it on the radiator to see if there's a problem at the head gasket(s).

anotheraznguy

iTrader: (1)

good idea.. didnt think of that one..
you think i should do that or pull the heads off first?

i hope its just a gasket and nothing else..
save me a lot of downtime cause my next event is less than a month away

farmington

iTrader: (14)

you could also fill it up with water, take the radiator cap off, start it up. When the thermostat opens, if you have a bad gasket or crack, you'll see bubbles in the coolant.

LS6427

iTrader: (2)

Head gasket.

But do a coolant system pressure test. BUT.....MAKE SURE you remove all 8 spark plugs. If a cylinder fills with coolant....you need to know it before you crank the sucker again so you don't hydralock it and damage the engine.

.

anotheraznguy

iTrader: (1)

so i pulled the heads off and i cant see if the hg was blown.
are there any telltale signs on the block / head / gasket that would indicate a blown headgasket?

crainholio

iTrader: (2)

Did you do a cooling system pressure test?

anotheraznguy

iTrader: (1)

no i didnt get the chance to..
i can take pics of the heads / gaskets / block if needed?

i cant see if there is any leakage going on

anotheraznguy

iTrader: (1)

so any thoughts.. wanted to start picking up some parts sooner than later..