Where is my coolant going?

[shrekmoose]

OK so im new here. Just bought my 1009 the other day havent even trailered it home yet. The guy i bought it from got it from a military auction and the thing only has 39,000 miles on it. But, he said it is getting coolant into the piston somehow. As of now the guy at the shop its at says the number 5 piston is hydro-locked(this is mainly an offroad suspension shop). He thinks its cavitation or a crack in the cylinder. The guy i bought it from says he just redid the head and he thinks it make the problem worse so im lost. Any ideas what this may be? Im hoping someone just really messed up a gasket and it will be an easy fix. But hey for 200 bucks and a cd player it aint to bad.

 

[CCATLETT1984]

while it could be a crack in the cylinder, it would be far more likely that its a cracked head or bad head gasket.

 

[DanMartin]

Pull the heads and have them magna-fluxed...that'll tell you for sure. Check the gaskets carefully when the head is off...usually (not always) you can see where the leak was. If it's the block, you can magna-flux that too, but I usually use a dye process if it's still in the vehicle.

Then you'll know...

I bet it's a gasket. Consider new (yes, new) bolts or studs when reassembling...old bolts can stretch. Not a requirement, but sort-of cheap insurance. Also use a quality gasket (of course).

If it's the block...there are plenty of pulled motors out there. I wouldn't bother trying to fix an old one when there are good pulls out there you can drop in for minimal fuss.

 

[CCATLETT1984]

Dont "consider" new bolts, the head bolts are torque-to-yield. ONE TIME USE ONLY.. Spend the little bit of money and get new bolts or spend the dough on a stud kit.

 

[Bozor1000]

I agree with the above forementioned!

 

[FMJ]

Re: RE: Where is my coolant going?

Dont "consider" new bolts, the head bolts are torque-to-yield. ONE TIME USE ONLY.. Spend the little bit of money and get new bolts or spend the dough on a stud kit.

They used TTY bolts back in the 80's?, as head bolts?......First time I've run into those was on my 06 GTO.

 

[m35a2cowner]

Coolant loss

Since the guy just "rebuilt" the head get the casting number(s) of the block and head and ask someone knowledgeable about the engine and see if its the right head for the block. Also, check to make sure the right head gasket was installed. I agree with the head bolt replacement, however....make sure to clean out the bolt holes. If there was a leaking condition that caused the head replacement it could have made some sludge that found its way into the bolt holes and the bolts are binding or bottoming out before they apply the right amount of clamping force to the head. Good luck with your project.

 

[DanMartin]

Re: RE: Where is my coolant going?

Dont "consider" new bolts, the head bolts are torque-to-yield. ONE TIME USE ONLY.. Spend the little bit of money and get new bolts or spend the dough on a stud kit.

They used TTY bolts back in the 80's?, as head bolts?......First time I've run into those was on my 06 GTO.

Agreed with FMJ...including the part about the 06 GTO.

Small world....you on the ls2gto.com site?

*ahem*...anyways...back on topic:

I thought the TTY stuff came in much later. Most of the diesel engines I've ever seen have had the older style bolt or stud design...but honestly I'm not an expert here, so someone please check me on this.

Anyways...let me re-enforce my previous statement: "Seriously Consider new bolts or a stud kit". If you go with a good ARP stud kit (Should be around $100), you'll never have to worry about bolt stretch and torque issues again.

 

[DanMartin]

RE: Re: RE: Where is my coolant going?

OK...a bit of online research....looks like the bolts are not re-usable on the 6.2/6.5 (several posts in different diesel forums seem to confirm this). Not sure if they are truly TTY, but either way, it looks like they are junk once used (maybe this is contributing to the sealing issues you are seeing).

Summit Racing has the stud kits for $159 for the 6.2. I can't imagine the 6.5 kits being much more. Apparently you can get a *ton* more clamping force with the studs (and they are re-usable).

...and there you go. Probably way more information than you needed, huh?

 

[CCATLETT1984]

RE: Re: RE: Where is my coolant going?

They are TTY bolts, stupid place to use them, but thats what GM did.

 

[FMJ]

Re: RE: Where is my coolant going?

Dont "consider" new bolts, the head bolts are torque-to-yield. ONE TIME USE ONLY.. Spend the little bit of money and get new bolts or spend the dough on a stud kit.

They used TTY bolts back in the 80's?, as head bolts?......First time I've run into those was on my 06 GTO.

Agreed with FMJ...including the part about the 06 GTO.

Small world....you on the ls2gto.com site?

Yeah, 06 M6 PBM with 112 Maggy