9 replies to this topic

[roy1964]

Hi, when rebuilding a engine should you use gasket sealant on every gasket (apart from head gasket) or are some gaskets used dry. Any suggestions for which product to use if that the case.

[Wiggy]

The gasket between the block/Gearbox and the transfer case should NOT have any sealant. Very important it goes on dry.

On the others, some people use grease, some blue Hylomar, some other stuff.

I used a thin smear of Hylomar. Seems OK.

[nicklouse]

The gasket between the block/Gearbox and the transfer case should NOT have any sealant. Very important it goes on dry.

On the others, some people use grease, some blue Hylomar, some other stuff.

I used a thin smear of Hylomar. Seems OK.

why? i have always used Blue Hylomar on them. never had any issues or leaks.

[Spider]

I use Permatex / Loctite No.3 on all gaskets, except for;-

 

Head Gasket - usually dry, but depending on what it is, I may use Blue Spray on Hylomar

 

Cork Rocker Cover Gasket - dry

 

Water Pump, Thermostat Cover, Heater Take Off - RTV

[roy1964]

Thanks Moke Spider

[cal844]

As Moke says ?

[Wiggy]

The gasket between the block/Gearbox and the transfer case should NOT have any sealant. Very important it goes on dry.

On the others, some people use grease, some blue Hylomar, some other stuff.

I used a thin smear of Hylomar. Seems OK.

why? i have always used Blue Hylomar on them. never had any issues or leaks.

Because I don't think you can reliably measure the idler end float if you have sealant on the gasket. There's no real reason to to do it. The gasket seals perfectly ok dry.

[nicklouse]

 

 

The gasket between the block/Gearbox and the transfer case should NOT have any sealant. Very important it goes on dry.

On the others, some people use grease, some blue Hylomar, some other stuff.

I used a thin smear of Hylomar. Seems OK.

why? i have always used Blue Hylomar on them. never had any issues or leaks.

Because I don't think you can reliably measure the idler end float if you have sealant on the gasket. There's no real reason to to do it. The gasket seals perfectly ok dry.

 

will have zero effect on endfloat.

[Wiggy]

The gasket between the block/Gearbox and the transfer case should NOT have any sealant. Very important it goes on dry.

On the others, some people use grease, some blue Hylomar, some other stuff.

I used a thin smear of Hylomar. Seems OK.

why? i have always used Blue Hylomar on them. never had any issues or leaks.

Because I don't think you can reliably measure the idler end float if you have sealant on the gasket. There's no real reason to to do it. The gasket seals perfectly ok dry.

will have zero effect on endfloat.

How come?

[Spider]

 

 

 

 

The gasket between the block/Gearbox and the transfer case should NOT have any sealant. Very important it goes on dry.

On the others, some people use grease, some blue Hylomar, some other stuff.

I used a thin smear of Hylomar. Seems OK.

why? i have always used Blue Hylomar on them. never had any issues or leaks.

Because I don't think you can reliably measure the idler end float if you have sealant on the gasket. There's no real reason to to do it. The gasket seals perfectly ok dry.

will have zero effect on endfloat.

How come?

 

 

It may do and theoretically, you may have a point, however, you'd need very very expensive and 'fine' measuring gear costing all of your children + the wife to be able to sensibly measure it.