LLY: 05 lly blowing coolant outta overflow

[NC-smokinlmm]

Common lly issue. Around here it is around 4 grand to have them done. Parts are around 900.00 with studs. Machine work varies.

Yep, only reason I've never owned an lly...

 

[WVRigrat05]

Run the truck up to operating temp. (hose will be very hard, can't be squeezed together) Let the truck cool completely, usually over night (hose should be fairly soft, easily squeezed together). If it's soft, I would put a new cap on it and see how it acts.

For what it's worth my LLY went 95K before I lost a head gasket. It's had double stacked tunes in it's early days and a 600+ rwhp tune for the last 5 years... My head gaskets owed me nothing.

I owned mine a month and it was new, lol, but the 60k I ran it with them oooped made up for it

 

[Parker_]

Run the truck up to operating temp. (hose will be very hard, can't be squeezed together) Let the truck cool completely, usually over night (hose should be fairly soft, easily squeezed together). If it's soft, I would put a new cap on it and see how it acts.

For what it's worth my LLY went 95K before I lost a head gasket. It's had double stacked tunes in it's early days and a 600+ rwhp tune for the last 5 years... My head gaskets owed me nothing.

So I did this and this am it was fine , soft no issues . So yeah just get a new radiator cap ?
As in the cap on the overflow right ?

Sent from my iPhone using Tapatalk

 

[Burn Down]

Yep overflow cap. I would try that first...

 

[Parker_]

Yep overflow cap. I would try that first...

Prepare to laugh at me : overflow cap was the problem . Also had a pinched heater line going to the core no clue how that happend . Feel shameful for even writing this thanks for your help guys


Sent from my iPhone using Tapatalk

 

[NC-smokinlmm]

Prepare to laugh at me : overflow cap was the problem . Also had a pinched heater line going to the core no clue how that happend . Feel shameful for even writing this thanks for your help guys


Sent from my iPhone using Tapatalk

All the Lily's I've seen have weird problems that you think are fixed. Everyone has had gaskets, eventually it will leak from the passengers side head at the back near the fire wall...

 

[Burn Down]

Prepare to laugh at me : overflow cap was the problem . Also had a pinched heater line going to the core no clue how that happend . Feel shameful for even writing this thanks for your help guys


Sent from my iPhone using Tapatalk

No laughing here, glad it was something simple.

 

[c20elephant]

Prepare to laugh at me : overflow cap was the problem . Also had a pinched heater line going to the core no clue how that happend . Feel shameful for even writing this thanks for your help guys


Sent from my iPhone using Tapatalk

Are you talking about the heater core.? I came pretty close to breaking the plastic connector of the hose while installing my downpipe.

 

[Parker_]

Are you talking about the heater core.? I came pretty close to breaking the plastic connector of the hose while installing my downpipe.

Yup ! It actually broke the fitting when I went to replace it . So no heater for me , and now I got a code glow plug control module as well . I know there not related just saying . Hoping it starts gonna be 30 degrees at 3 am


Sent from my iPhone using Tapatalk

 

[Parker_]

No laughing here, glad it was something simple.

Thank you


Sent from my iPhone using Tapatalk

 

[Parker_]

All the Lily's I've seen have weird problems that you think are fixed. Everyone has had gaskets, eventually it will leak from the passengers side head at the back near the fire wall...

Thanks gonna keep a special savings going because after this scare and they many google search articles it's def going to happen . Some guys chimed in here at like 40k 90k and 200k miles so it seems just the luck of the draw I guess


Sent from my iPhone using Tapatalk

 

[TheBac]

Prepare to laugh at me : overflow cap was the problem . Also had a pinched heater line going to the core no clue how that happend . Feel shameful for even writing this thanks for your help guys


Sent from my iPhone using Tapatalk

Simple, cheap solutions are the best, no matter how you find them. Glad for you. :thumb:

 

[Parker_]

Simple, cheap solutions are the best, no matter how you find them. Glad for you. :thumb:

Thanks


Sent from my iPhone using Tapatalk

 

[c20elephant]

Simple, cheap solutions are the best, no matter how you find them. Glad for you. :thumb:

Found one on my truck a couple weeks after replacing the alternator with a higher at idle output amperage. The wires coming out of the alternator where it disappears into the larger harness were rubbed through, no charging issues just doing my every 2 month inspection and started pulling some loose tape when I found them...

 

[Parker_]

Found one on my truck a couple weeks after replacing the alternator with a higher at idle output amperage. The wires coming out of the alternator where it disappears into the larger harness were rubbed through, no charging issues just doing my every 2 month inspection and started pulling some loose tape when I found them...

Nice


Sent from my iPhone using Tapatalk

 

[Tobin LLY]

LLY Blowing Coolant Out!

So this seems to be a common issue on the LLY... The question is; WHY?

My '05 is doing it now at 154,000 miles!
Is it always the same side that goes? and which side is it?
Who has an upgrade gasket so it does not happen again?
Why is there no coolant mixing with the oil?
Someone mentioned Head Studs. Do I need to replace them as well? The truck is stock...
Can I do just the Head Gasket or is it necessary to do all the others I see in various kits?
Any one have a recommended procedure for the gasket replacement?

Thank for the help!

 

[clrussell]

So this seems to be a common issue on the LLY... The question is; WHY?

My '05 is doing it now at 154,000 miles!
Is it always the same side that goes? and which side is it?
Who has an upgrade gasket so it does not happen again?
Why is there no coolant mixing with the oil?
Someone mentioned Head Studs. Do I need to replace them as well? The truck is stock...
Can I do just the Head Gasket or is it necessary to do all the others I see in various kits?
Any one have a recommended procedure for the gasket replacement?

Thank for the help!

Google Lly head gasket replacement.. the new gaskets from gm are good, the new head bolts are plenty for a stock or lightly modded truck.