New trick when sealing exhaust studs...

[Krooser]

I was watching a video where the mechanic was changing exhaust manifold studs on a Detroit 8V92 diesel....the studs go into water in the heads.

The guy backed the studs about 90% out then his assistant stuffed a running shop vac into the radiator fill tube to create a suction in the cooling system .


Once the vac was in the radiator he simply unscrewed the stud out of the head, got maybe three drops of coolant on his hands then bingo no more dripping coolant.

He replaced the studs, pulled the vac out of the radiator and he was done... No coolant cleanup!!!

Pretty trick...

 

[matthon]

I've seen that done when fixing/replacing an oil drain plug/gasket.

 

[moparedtn]

We've done that to fire sprinkler systems for a long time now - I introduced that to a couple different
companies I've worked for in the past. Grainger sells a vacuum unit that is built to be installed in the
top of a 55 gallon barrel (either 3.5 or 5.0 hp power) and has a large hose that we put over the main
drain on the sprinkler system.

Once the whole system is under vacuum, we can facilitate repairs without spilling a drop in occupied
buildings (medical, office, nursing homes, etc....).

 

[RJ Squirrel]

Hey on a related note, I need to change out the studs on my heads (on the bench) do they need sealer on the threads?

 

[Don Frelier]

Hey on a related note, I need to change out the studs on my heads (on the bench) do they need sealer on the threads?

yes, unless they are aluminum aftermarket.

 

[RJ Squirrel]

Cast iron heads- Hi temp RTV? Loctite?

 

[Don Frelier]

 

[RemCharger]

 

[bobsgtx]

I've used a shop vac and also an a/c vacuum pump on large hydraulic tanks on equipment. works well. Shop vac had to be replaced after 1 hour of continuous operation without air going threw it to cool.

 

[R413]

This is an old trick in Diesel shops. I learned it 24 years ago.

Can you imagine how long it takes to drain and refil the cooling system with that many gallons of capacity?

 

[Krooser]

Cast iron heads- Hi temp RTV? Loctite?

I use an Indianhead sealer...have for 60 years

 

[Krooser]

This is an old trick in Diesel shops. I learned it 24 years ago.

Can you imagine how long it takes to drain and refil the cooling system with that many gallons of capacity?

Yes I can ....been trucking 52 years but I can say I have never seen that before.

Be between my son and I we have owned two dozen trucks...I guess we're just out of touch!

 

[R413]

Yes I can ....been trucking 52 years but I can say I have never seen that before.

Be between my son and I we have owned two dozen trucks...I guess we're just out of touch!

Working in a shop there are many other mechanics there to learn these things from. If I never worked there I would have learned it here today!

 

[beanhead]

This is an old trick in Diesel shops. I learned it 24 years ago.

Can you imagine how long it takes to drain and refil the cooling system with that many gallons of capacity?

Pop's family was in the trucking business for years...needless to say I learned a lot hanging around the shop when I was a youngin!
I've used my shop-vac to vacuum out coolant when doing head swaps with the engine in the car many times, to empty the heads as much as possible but mainly to keep it from spilling into the cylinders when the heads are pulled.
A piece of heater hose ducky taped to the vac hose works real good to snake into the water pump ports.
Oh, be sure to remove the filter from your vacuum first!

 

[66 Cornpicker]

Hey Krooser, I've done that at work on a large hyd. system, 1" steel lines. I hooked a Welch vaccum pump up to the vent of the tank and it worked. Minimal clean up, everyone was very happy especially ME ! Since that time I have always had a vaccum pump at home in the garage.

 

[WileERobby]

I use an Indianhead sealer...have for 60 years

You got me beat by a few years, old-timer.

 

[RJ Squirrel]

Can you still buy it?
Is it called Native American Head now?

 

[ynst]

I was watching a video where the mechanic was changing exhaust manifold studs on a Detroit 8V92 diesel....the studs go into water in the heads.

The guy backed the studs about 90% out then his assistant stuffed a running shop vac into the radiator fill tube to create a suction in the cooling system .


Once the vac was in the radiator he simply unscrewed the stud out of the head, got maybe three drops of coolant on his hands then bingo no more dripping coolant.

He replaced the studs, pulled the vac out of the radiator and he was done... No coolant cleanup!!!

Pretty trick...

That's nothing new. I used to change hydraulic pumps on Gradalls in the sixties the same way.

Fire up the carrier and hook up a vacuum hose to a filler cap fitted with a barbed fitting.

....and that was on a 1+ inch supply line.

When I was all done, I simply shut down the carrier engine, removed the vacuum hose and replaced the oil tank cap.

I still have that very same filler cap in my tool box hydraulic fittings drawer after all these years.

 

[Krooser]

Can you still buy it?
Is it called Native American Head now?

Rainbow Head....very popular in San Francisco I hear...

 

[Krooser]

You got me beat by a few years, old-timer. View attachment 1674790

Who you calling....hold on I gotta finish my Geritol...ok...who you calling old timer?

Young whippersnapper!!!!