The Complete Engine Sealant Thread...

[The Watson]

Originally Posted by Jeff Alton

"the Watson"

Top or Bottom studs?

If top, you should be able to get access by removing alternator and releasing the tin deflector. Replace o-rings, and re torque. If bottom bolts, you have more work to do...

NO to RTV.....

Cheers

It was the top right side. Was able to replace orings without removing the shroud. I did use a fine bead of rtv on the outside edge of washer and nut, where there is no risk of it entertaining the crank case. No leaks after cure and restart.

[Cevan]

Originally Posted by Privateer383

Same list as previously posted by others, except I added the return tube o-ring lubricant as recommended in one of Henry Schmidt’s previous posts.

Outer Case Halves: Threebond 1104 (now 1184)

Bearing Saddle Surfaces: Loctite 574

#8 Bearing (balancer end) O-Ring: Threebond 1211 (now 1215)

Case Thru Bolts: Dow Corning 111 on Green Viton O-Rings

Flywheel Seal: DRY

Balancer Seal: DRY

Intermediate Shaft Cover to Case: ThreeBond 1211 (now 1215)

Oil Breather Cover to Case: ThreeBond 1211 (now 1215)

Cylinders to Case: Curil K-2 or ThreeBond 1211 (now 1215)

Cam Towers to Cylinder Heads: Threebond 1104 (now 1184)

Cam Chain Housings to Case: Threebond 1104 (now 1184)

Cam Chain Housings to Cam Towers: Threebond 1104 (now 1184)

Cam Chain Housing Cover to Cam Chain Housing: Threebond 1104 (now 1184)

Gaskets: Thin coat of Loctite 574

Oil return tube O-rings: Dow 55 o-ring lubricant (alternate: Dow 111).

Can someone clarify this?? Oil Breather Cover to Case, Cam Chain Housings to Case, Cam Chain Housing Cover to Cam Chain Housing, Cam Chain Housings to Cam Towers: Threebond 1184?? All of these have gaskets. Are you saying apply 1184 to the gaskets? Then down below it says thin coat of Loctite 574 on gaskets.

I thought gaskets were installed dry. So is the consensus dry or 1184 or 574?

[Henry Schmidt]

Originally Posted by Cevan

Can someone clarify this?? Oil Breather Cover to Case, Cam Chain Housings to Case, Cam Chain Housing Cover to Cam Chain Housing, Cam Chain Housings to Cam Towers: Threebond 1184?? All of these have gaskets. Are you saying apply 1184 to the gaskets? Then down below it says thin coat of Loctite 574 on gaskets.

I thought gaskets were installed dry. So is the consensus dry or 1184 or 574?

1184 on all metal to metal surfaces. Gaskets are designed to be installed dry but as parts get older (torquing and heat cycles) distort sealing surfaces. We like to resurface as many of those areas as possible but some as very difficult. Gaskets often need some assistance.
As a general rule, if a gasket may need to be changed or the thermal characteristics of the surfaces require movement, we use Curil "T" If the surface is stable and not likely to need replacing anytime soon, a very thin coat of 574 is applied.

[Cloggie]

Originally Posted by Henry Schmidt

1184 on all metal to metal surfaces. Gaskets are designed to be installed dry but as parts get older (torquing and heat cycles) distort sealing surfaces. We like to resurface as many of those areas as possible but some as very difficult. Gaskets often need some assistance.
As a general rule, if a gasket may need to be changed or the thermal characteristics of the surfaces require movement, we use Curil "T" If the surface is stable and not likely to need replacing anytime soon, a very thin coat of 574 is applied.

...I presume both sides of the gasket of course...

D.

[Henry Schmidt]

Originally Posted by Cloggie

...I presume both sides of the gasket of course...

D.

Very thin coat on both sides.....basically just wet. No bead.

[Cevan]

Thanks Henry.

[88911coupe]

Am I correct that 574 would be preferred over 1184 for the air breather cover? This does not seem like an application where a lot of movement would be occurring for the surfaces?

[efhughes3]

Originally Posted by 88911coupe

Am I correct that 574 would be preferred over 1184 for the air breather cover? This does not seem like an application where a lot of movement would be occurring for the surfaces?

Hey Buck, long time! Hope you're well. I've always used 574 for that, as have many, many others.

[88911coupe]

Hey Ed! Great to hear from you! Thanks for the info, now just waiting for the 574 to arrive so I can wrap up my project.

[porschedude996]

How about a recommendation on the plugs on the cam tower. The ones on the forward end as installed on the engine. To clarify, the same diameter as the cam bearing.

[mikedsilva]

Originally Posted by porschedude996

How about a recommendation on the plugs on the cam tower. The ones on the forward end as installed on the engine. To clarify, the same diameter as the cam bearing.

I was recommended to use 574 on that cam plug. Have not had a leak in over 20 motors.

[porschedude996]

Originally Posted by mikedsilva

I was recommended to use 574 on that cam plug. Have not had a leak in over 20 motors.

Thanks Mike!

[Jeff Alton]

We use 574 there as well.

Cheers

[porschedude996]

Thank you Jeff.

[GovernorModr]

The only issue I encountered were a few rocker shafts that "walked", and even with the RSR seals, leaked until I finally got them right.

[mikedsilva]

Originally Posted by GovernorModr

The only issue I encountered were a few rocker shafts that "walked", and even with the RSR seals, leaked until I finally got them right.

haha
sounds like a legit account for sure...

[WYDBODY1986]

How hard is 574 to remove if you have a leak and need to redo a part you used it on? Say the chain housing to case area?

[winders]

Main bearing web surfaces should be nothing.....

[dennisv]

I have spent my Sunday morning skimming all 37 pages of this thread. Thanks to Henry Schmidt, CBRacerX, Wayne 962, and others who have contributed. A few questions as I am near assembling our 914-6 (aka 1969 911T) engine in 2023.

• Current Availability: Are the products listed in post 1 and sold in the SuperTec / Pelican kit still current and available in 2023?
• Cylinder Base with Copper Gasket: Master list perhaps updated to include Henry’s recommendation for cylinder bases with copper gaskets: Curil T?
• O-rings: Bruce Anderson had recommended (circa 2009) Dow 111 silione paste. Is it worth comparing to Dow 55?
• Terminology: There are some words being used interchangeably. Do I have my engine anatomy labeled correctly in this photo?

[dennisv]

Are folks putting rubber grease on the oil pump seals?