Valve stem seals

[SAndreasen]

Can I replace valve stem seals with the head on the truck 99 ?

 

[Joe Mc]

We did this on a buddy of mine's truck some years back. Check Geno's Garage for the valve spring compressor tool (different one for 12v than 24v). We brought each piston up to TDC, used calve spring compressor tool, removed keepers, loosened the tool removed (1 at a time) each spring, then the seal, new seal, replace spring, next and etc. ending with recompressing springs and keepers. I "think" in the FSM there's instruction on procedure.

 

[Cummins12V98]

My first question is how do you know the valve stems are bad?

 

[SAndreasen]

My first question is how do you know the valve stems are bad?

Oil coming out of the exhaust manifold at number one cylinder

 

[Cummins12V98]

Oil coming out of the exhaust manifold at number one cylinder

OK, is it possible its a broken ring?

 

[SAndreasen]

OK, is it possible its a broken ring?

I dearly hope not but yes definitely possible going to pull the valve cover off get the tool and see what I can see I really don’t feel like doing another engine rebuild right now it’ll probably get ran if that’s the case

 

[Cummins12V98]

Not an expert here but do the number 1 seals FIRST then see if it helps.

Good luck!!!

 

[SAndreasen]

Not an expert here but do the number 1 seals FIRST then see if it helps.

Good luck!!!

That’s the plan for now . Truck has unknown miles and I do know it came off the oil fields it’s been beat pretty bad

 

[SAndreasen]

I may pull the head anyway there is a exhaust manifold bolt broken off . No idea the history of the engine or anything on this truck . Someone has replaced the rear axle with one from a first gen 350

 

[SAndreasen]

We did this on a buddy of mine's truck some years back. Check Geno's Garage for the valve spring compressor tool (different one for 12v than 24v). We brought each piston up to TDC, used calve spring compressor tool, removed keepers, loosened the tool removed (1 at a time) each spring, then the seal, new seal, replace spring, next and etc. ending with recompressing springs and keepers. I "think" in the FSM there's instruction on procedure.

my factory service manual on cd quit working I need to get a new one

 

[Timd32]

Found this one.