Alright guys, I was having this issue before the track, it's what caused me to pull the t-stat out. I've since replaced the radiator and the water pump and put a brand new t-stat in.
She still heats up to about 240 or so when I get on it.
I've done a compression test. Even all that way across and holds at 150. Fan is working. The temp stays up for a short period of time then comes back down.
I've been chasing this since about 3 days after going to hi boost. I didn't have a problem without the t-stat, but attribute not having one to the radiator going kaput. I was also pushing a lot of coolant out of the overflow during my passes on Saturday. So much so that I had to put a "catch-can" on the coolant overflow.
I've already ordered a new head gasket, thinking that possibly pressurized air was seeping into the cooling system and over pressurizing it causing the excessive blow out of the overflow.
I have no coolant in the oil, and the coolant that I drained out yesterday was not contaminated at all.
I'm stumped at this point. Is it a headgasket and my compression test just isn't showing it due to not enough pressure to show the problem? Normal driving is fine, temp stays normal. As soon as I start to hit ANY boost at all the temp starts to creep up. I'm not looking for the direct answer here, just point me in the right direction. I've expired my thoughts on this, looking for some input from my peers.
Is this normal and I'm just overreacting or is something wrong here?
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
Was gonna msg you on MSN but you just dropped offline.
Is this on the new sleeved engine?
Have you removed / checked the water neck at the back of the engine? That thing is really close to the turbo...
I kinda *doubt* your block is clogged but stranger things happen. It's very apparent you have pressure building IMMENSELY in the system to be losing coolant out the expansion tank like that.
When you put the coolant in the system, are you using a pressure bleeder to test and bleed the system?
-Chris-
-Sweetness-
-Turbocharged-
Slowly but surely may some day win this race...
Sorry Chris, had to come out and do the comp test before I posted, I'll get back on and we'll talk.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
Chris is the mother fu
cking man. In a 20 min convo on msn we think we've got it narrowed down to headgasket. The compression, while held steady and didn't fluctuate, was extremely low for a 10:1 cr motor. New head gasket is on it's way. I'll report back when the final say is in.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
150 is a little low, should be around 185.
smell the coolant. put a pressure gauge to the coolant resevoir to see how high the pressure gets.
Skunk - Now With Petey wrote:Chris is the mother fucking man. In a 20 min convo on msn we think we've got it narrowed down to headgasket. The compression, while held steady and didn't fluctuate, was extremely low for a 10:1 cr motor. New head gasket is on it's way. I'll report back when the final say is in.
Yeah I'd agree with the compression test being low for 10:1 I think mine after the build was around 195, but I'd have to go look at my notes to be sure and I'm not certain where they are right now. Although if it were a head gasket I woudn't expect all the cylinders to be the same....
12.770 @ 111.99 Intercooled Eaton M62
Also you can drill out the hole in the tstat for a little extra. Also adding ducting and a more powerful fan. but yeah head gasket first. 150 is horrible for 10:1 engine.
What's amazing guys...this was a problem BEFORE my runs on Saturday. So with a bad head gasket, I still trapped 129.82
. This makes me very happy.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
my 96 130K LD9 was at 160 on a block that sat for 3 years.......
What head gasket are you running? in the DSM world, with high boost and comp, the head can "lift" off the block.........
Best of luck
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
Skunk - Now With Petey wrote:What's amazing guys...this was a problem BEFORE my runs on Saturday. So with a bad head gasket, I still trapped 129.82 . This makes me very happy.
did you pull the head yet to verify?
be sure to check the outboard sections of the #1 and #4 combustion chambers.. they're known trouble spots.
but, lets not count our eggs before they've hatched.. get that head off.
yea i did my cr check on my old eco when i did the swap and had 210 across 3 and 1 had 200, did the headgasket and studded it down broughtthat one cylinder back up to 210 with the rest of them.
Head will be off today at some point.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
This much moisture on the hg when the cooling system was drained last night can't be a good thing...
This is just a cool pic
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
I would take the head to the machine shop to make sure it doesnt have a hairline crack that is expanding when it gets hot just an idea.
Already done. Head is perfect. Just waiting on head gasket now.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
Good job finding the problem guys. Hope it works out for you Curt.
Even though it was the headgasket this time, with the amount of boost you are throwing at that thing, I would REALLY consider an aluminum rad aswell as a 1 or 2 high flow fans.
Good luck getting it all back together.
time for an lsj or saab head.
gmanz24 wrote:time for an lsj or saab head.
I understand the casting is better...but the head wasn't the problem.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
what headgasket were you running?
Do you ecotec guys 0 ring your block/ head?
( i am coming from the dsm world)
Skunk - Now With Petey wrote:gmanz24 wrote:time for an lsj or saab head.
I understand the casting is better...but the head wasn't the problem.
if the head lifted causing headgasket failure or headgasket issues then yes the head is the prob. if the head is lifting a new headgasket isnt going to fix it.
Let's go with the theory that the head is lifting...I would have had problems a long time ago with lifting heads and such. Beating the hell outta my car is nothing new.
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4 Cams...32 Valves...5 Liters...This Could Get Fun!
head lifting off the block isn't a head issue, its a clamping issue.
might be time to try a different headgasket, and a higher torque spec on the headbolts
if that doesn't help, time to look into the uni-bolt upgrade.
with a alum head and block, it can "lift" in strange areas,(not as rigged and such) and not cause a gasket to pop like normal...
again, good luck!
Chris
'02 Z-24 Supercharged
13.7 @102.45 MPH Third Place, 2007 GMSC Bash SOLD AS OF 01MAR08
DaFlyinSkwir(LS61) /PJ/ OEM+ wrote:head lifting off the block isn't a head issue, its a clamping issue.
might be time to try a different headgasket, and a higher torque spec on the headbolts
if that doesn't help, time to look into the uni-bolt upgrade.
i thought the head lifting issue with the l61 was just that, the l61 head. hence gm added the support bolts then ended up going with the saab head.
and to curt, i thought now you were running much more boost than previously when u used to beat ur car. either way get it fixed, get on that dyno and back to the track
