I'll be stacking a rebuild here in the next couple weeks and I'm wondering about the lower leg sections of the housings. Most people use RTV (copper or black), but I'm wondering why I couldn't use Hylomar on these sections. I've read the specs on Hylomar and its pretty high temp and is perfect for close fitting areas. Its also self-healing.. so if a gap DID occur from vibration, it would close the gap and prevent leakage.. (in theory).



Just an idea... has anyone played with this?

factory uses silicon there...

No offense, but that really doesn't answer my question. https://www.nopistons.com/forums/pub...IR#>/smile.gif

Hylomar burns away and does not produce a seal, it is a taking agent. Use brushable RTV IMO but other people just glob RTV on there. Makes for some interesting things when I tear them down laughing at where all that RTV squeezed into. If you do not have brushable RTV just squeeze some on and spread it across as a film with your finger.

Is that based on actual experience? The stats on Hylomar are pretty good.....



http://www.hylomar.com/universal_blue_3.shtml



But, I could be misreading it.

I used Hylomar on my first engine. After several months, it started seeping oil between the stacks underneath the exhaust ports. No big deal, other than being annoying, since it was a new engine and should stay dry for at least a few years.



Since then, the legs see silicone sealant with no troubles.

^^ Good enough for me! https://www.nopistons.com/forums/pub...IR#>/smile.gif Thanks.



--Micah

Maybe they dont have a clue what theire doing but on the DIY-RE engine rebuild video the ONLY use hylomar..



Sindre

I know on the atkins one they use copper RTV in a thin layer.... I know they've been doing it for a while; so I suppose why fix it if it aint broke.

And maybe they have good luck with that. I can only offer first-hand experience on the matter.