Sealer use beyond new gaskets

[Acollin]

Hey All

I just ordered a new water pump , lower radiator hose and thermostat for my 1966 series V sunbeam alpine ( stock set up).
Do you advise a gasket sealant on either the water pump or the thermostat housing? If so, whatndo you use and how/ where is it applied.
I may have asked a similar question not that long ago- senior moments!! please forgive.
Thanks
Andrew

 

[fastfrontier17]

I just did my timing cover and water pump gasket and used permatex aviation form-a-gasket sealant no. 3. It goes on with a brush and doesn't really dry. I was tempted to use RTV, but this had good reviews. Instructions said to put it on the threads too, but I had the bolts in before I read the instructions lol...

 

[puff4]

I use Hylomar. It's expensive in relation to other sealants, but it has many advantages. It's self-healing, has a nice tack to help locate the gaskets, it doesn't dry out and become hard, and it's easy to remove when you have to disassemble. RTV is a poor choice for sealing any gasket, since if the seal ever gets dislodged it will leak like a sieve. Perhatex aviation sealer isn't horrible, but I really think Hylomar is better.

 

[Mike O'D]

I have never tried Hylomar - it looks like they have a number of different sealants. Which one did you use puff? I have used Permatex aviation gasket sealer for over 40 years and think it's great stuff.

 

[hartmandm]

The Hylomar I used for my water pump and thermostat housing: https://smile.amazon.com/gp/product/B00CFH9GZG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Mike

 

[Acollin]

While I have your attention

I bought my parts from classic sunbeam in new york. There are two different gaskets that are sold together. While I have not yet taken things apart can someone explain the two gasket package?
Why 2?
Thanks
Andrew

 

[fastfrontier17]

While I have your attention

I bought my parts from classic sunbeam in new york. There are two different gaskets that are sold together. While I have not yet taken things apart can someone explain the two gasket package?
Why 2?
Thanks
Andrew

There is a backing plate between the pump housing and engine block. One gasket is between the backing plate and block, and the other for the plate to the pump.

 

[Acollin]

Many thanks all

 

[puff4]

The Hylomar I used for my water pump and thermostat housing: https://smile.amazon.com/gp/product/B00CFH9GZG/ref=ppx_yo_dt_b_search_asin_title?ie=UTF8&psc=1

Mike

Yep, that's the stuff. Read the reviews.... it's good stuff.

Hartmandm, Thanks!

 

[Alpine 1789]

I use Hylomar... it's easy to remove when you have to disassemble.

I am another member who uses Hylomar extensively. My favorite use is on the intake manifold gasket. I have not had any problems with vacuum leaks since I began using it, at least not gasket-related leaks. That said, I am curious about your comment that it is "easy to remove". If it is just that the part is easy to remove, I am in complete agreement. But, removing the Hylomar from the engine or part surface is always a challenge for the very reasons that it works so well. Has anyone discovered a good solvent for removing it?

 

[Barry]

IIRC, Hylomar recommends acetone for cleanup. In fact, a cured polyester urethane is pretty much resistant to any common solvent.

 

[spmdr]

My $.02.

Back in the '90s, I gave up using gaskets on Alpine Oil pans, front covers, oil filter housings, side covers, water pumps

and thermostat housings/tanks.

I have been using RTV, with great results, at least from a Sealing perspective.

BUT, disassembly can be a challenge!

RTV is a formidable GLUE also!

Most of the time, TNT is needed to get RTVed parts off...


And, another note, don't use old, off brand RTV, it may not set up.

DW

 

[hartmandm]

I am another member who uses Hylomar extensively. My favorite use is on the intake manifold gasket. I have not had any problems with vacuum leaks since I began using it, at least not gasket-related leaks. That said, I am curious about your comment that it is "easy to remove". If it is just that the part is easy to remove, I am in complete agreement. But, removing the Hylomar from the engine or part surface is always a challenge for the very reasons that it works so well. Has anyone discovered a good solvent for removing it?

Hylomar sells a remover called HyloClean - https://smile.amazon.com/Hylomar-HyloClean-Cleaner-Degreaser-Remover/dp/B07M8H2N7R

 

[puff4]

I am another member who uses Hylomar extensively. My favorite use is on the intake manifold gasket. I have not had any problems with vacuum leaks since I began using it, at least not gasket-related leaks. That said, I am curious about your comment that it is "easy to remove". If it is just that the part is easy to remove, I am in complete agreement. But, removing the Hylomar from the engine or part surface is always a challenge for the very reasons that it works so well. Has anyone discovered a good solvent for removing it?

Hylomar can easily be removed using acetone or MEK.

 

[Alpine 1789]

Thanks, guys. I am pretty sure I have used lacquer thinner before but never straight acetone. I'll try that before investing in the HyloClean.

 

[puff4]

I just checked the SDS for HyloClean… it’s basically aerosol acetone.

https://ddenginc.com/wp-content/uploads/2016/11/HYLO-CLEAN-safety-data-sheet.pdf

 

[Alpine 1789]

An expensive way to apply acetone! Thanks.