LBZ: Questions during head gasket replacement/ head stud installation [Archive] - Duramax Diesels Forum

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JD4440
06-06-2011, 08:17 PM
Cylinder 4 had a considerable amount more soot on the head/piston than the others. A couple were clean and the rest somewhere in the middle. Star pattern was hardly noticeable, maybe due to the nozzles/small PW :confused:

LBZrcks
06-06-2011, 08:19 PM
Cylinder 4 had a considerable amount more soot on the head/piston than the others. A couple were clean and the rest somewhere in the middle. Star pattern was hardly noticeable, maybe due to the nozzles/small PW :confused:

Did you wipe the pistons off? Normally all the soot is built up and you can't see the star unless you wipe some of the soot off. I've seen stock pistons that have the star on them too.

JD4440
06-06-2011, 08:28 PM
yea, Once wiped off they were fairly obvious but not like I imagined they would be as high as it was tuned beforehand. Just odd the inconsistent buildup.

bullfrogjohnson
06-06-2011, 08:31 PM
I have seen this on all the motors I have torn down.

JD4440
06-06-2011, 08:55 PM
relieving to her. I was pretty concerned when we pulled the head and I seen that.

JoshH
06-06-2011, 10:42 PM
I have seen this on all the motors I have torn down.
Me too. I don't know what causes it. Maybe just what happens when you shut the motor off. It probably blows it out once it's fired back up and ends up in another cylinder next time it shuts down.

JD4440
06-07-2011, 06:46 AM
Me too. I don't know what causes it. Maybe just what happens when you shut the motor off. It probably blows it out once it's fired back up and ends up in another cylinder next time it shuts down.

Well in a way I thought that too. Like it was the last one to fire.

JD4440
06-08-2011, 08:27 PM
Did you wipe the pistons off? Normally all the soot is built up and you can't see the star unless you wipe some of the soot off. I've seen stock pistons that have the star on them too.

Jason could you change the title of this thread to "Questions during head gasket replacement/ head stud installation" please. This is why:

How many tries does it take the average first timer to install the coolant bypass pipe between the t-stats and the pump? I went through 2 o-rings and the one that came out before the t-stat one didn't leak :(. I pray to God it hasn't leaked when I get there tomorrow afternoon.
I've seen that studs make it to where the upper hose stays unpressurized even when the motor is warm. why is this, is the entire system under that much less pressure ? I hope so , might keep that o-ring from leaking :(
I wasted all my coolant fixing this dang leak, so I started using the hosepipe to get it fixed. I'm wondering if it mixed with what's below the bypass pipe. I was thinking maybe I could take the larger hose off the reservoir and drain it out until it went from clear to orange :confused:
What size is that hose anyway? Might me a decent spot to put a drain sometime.
I guess I'm putting a coolant filter on to catch all of what might have went into the motor while we cleaned the deck. I mean why not, I'm already in the poor house because of this ordeal :mad:

LBZrcks
06-08-2011, 09:36 PM
Jason could you change the title of this thread to "Questions during head gasket replacement/ head stud installation" please. This is why:

How many tries does it take the average first timer to install the coolant bypass pipe between the t-stats and the pump? I went through 2 o-rings and the one that came out before the t-stat one didn't leak :(. I pray to God it hasn't leaked when I get there tomorrow afternoon.
I've seen that studs make it to where the upper hose stays unpressurized even when the motor is warm. why is this, is the entire system under that much less pressure ?
Having stock bolts or studs in it shouldn't affect how much pressure is in the coolant system. It's not supposed to leak any pressure into it. On my trucks the upper hose will get sucked in sometimes after I turn them off.

I hope so , might keep that o-ring from leaking :(
I wasted all my coolant fixing this dang leak, so I started using the hosepipe to get it fixed. I'm wondering if it mixed with what's below the bypass pipe. I was thinking maybe I could take the larger hose off the reservoir and drain it out until it went from clear to orange :confused:
What size is that hose anyway? Might me a decent spot to put a drain sometime.
I guess I'm putting a coolant filter on to catch all of what might have went into the motor while we cleaned the deck. I mean why not, I'm already in the poor house because of this ordeal :mad:

Done.

JD4440
06-09-2011, 04:15 AM
Odd that I've seen myself and people's commented to me that the hose stays where you can pinch it with studs. That's all I could think of is there was a bit of pressure bleeding off into the system.
Thanks for the title change.

JD4440
06-09-2011, 08:40 PM
Well, she runs. Took her around the block but didnt call on it. maybe next week.................

8100 Power
06-09-2011, 11:03 PM
Well, she runs. Took her around the block but didnt call on it. maybe next week.................

Does it feel faster??

-Shep-
06-10-2011, 05:41 AM
Well, she runs. Took her around the block but didnt call on it. maybe THIS AFTERNOON.................
Fixed it! :D

JD4440
06-10-2011, 07:59 PM
Hose was as flat as it's ever been cold today when I got there. You guys don't know how long I've been waiting to see that again. Good to have her home
Does it feel faster??

Haha, real easy so far. Drove it home today and installed my coolant filter. Maybe some fun tomorrow.

JD Dave
06-11-2011, 05:18 AM
Odd that I've seen myself and people's commented to me that the hose stays where you can pinch it with studs. That's all I could think of is there was a bit of pressure bleeding off into the system.
Thanks for the title change.

My hose gets sucked in sometimes also and it was scaring me. I'm also getting a firm upper rad hose when I beat on it. My coolant level doesn't seem to be changing though but it has me very worried. I'm glad you got your truck all fixed up.