Can you use high temp.....
 

RTV as a gasket between the exhaust manifold and the riser without a gasket?

I have stainless marine exhaust and don't have new gaskets from the company to go between the manifold and the riser.

Or,, can I buy some gasket material and cut me one to fit and use High temp rtv?

Thanks,
Shawn

Re: Can you use high temp.....
 

I'd call Stainless and ask, any BBC exhaust gasket should work.

Re: Can you use high temp.....
 

I'm talking about the 3 or 4 " round one between the manifold and riser?? Just want to make sure I'm explaining it clearly.

Thanks, :D
Shawn

Re: Can you use high temp.....
 

OOPs,

Yes buy a sheet of 1/16 gasket material of whatever SM recomends, red rtv on both sides wont hurt.

Just lay the gasket material on the header surface and use the round end of a ball peen hammer to get impressions of the bolt holes. Cut those out and use bolts to center it whilst you get an impression of the exhaust hole.

Re: Can you use high temp.....
 

In my redneck days, (OK, still today :D ) I would use beer or soda cases (paperboard) as gasket stock.

Sounds hillbilly-ish, and it is, but it works pretty darn good.

Re: Can you use high temp.....
 

Mine do not line up 100%. I do use the gasket, but still have to use a LOT of the RED High Temp RTV.

I mechanic showed me that trick and it works great.

Honestly I do not see where you need that thin gasket if you have to use the RTV.

Re: Can you use high temp.....
 

done that :drink:

Ive been looking at the new Coors cooler 12 pack longneck box and wondering if that would make good gasket material :D

Re: Can you use high temp.....
 

The last time I had my stainless marine manifolds off we just used the orange high temp rtv with no gskts on the risers and tail connections because I didn't have their gaskets anymore either,it will work,Smitty

Re: Can you use high temp.....
 

Thanks for the reply guys!!


I'll see what the local auto parts store has laying around., I have the orange high temp,,,I need to find out if it is the same as the red.

Thanks again!! :evilb: :D
Shawn

Re: Can you use high temp.....
 

You Really Need To Use The Gaskets Along With The Sealer. We Have Them In Stock Just Holler

Re: Can you use high temp.....
 

callthem and get correct gasket not worth the outcome ( a motor ) if not done correctly

Re: Can you use high temp.....
 

I used the Hi-Temp gasket material from Napa for over 8 years and no problems. Just cut a square out, lay it on top of the manifold, rub the plastic part of your screwdriver to make an impression on the gasket material and use a carpet knife to cut it out. I also used Red RTV when putting it together.

I'm sure the gaskets directly from Stainless would be best. If you can get them do it. :cool:

Re: Can you use high temp.....
 

Hey Daryle

Is the red RTV recomended with the gasket ?

Re: Can you use high temp.....
 

depending on the type of gasket material ( merc gaskets have a silver coating on them that does not like any sealer ) I like to use aviation permatex because it penetrates the gasket a little and makes for a great seal

Re: Can you use high temp.....
 

The stainless marine manifolds I have leak MORE when I use the gaskets then when I just rtv them with high temp silicone rtv (on the tail pipe to riser).On the manifold to riser connection on mine I do use a gasket but the center divider gaskets are always burn't out between cylinders so I cut out the divider pieces so they won't get sucked into motor. Stainless marine needs to make some high quality gskts that are more duarble. As far as "losing a motor" no water passes thru any of their connections so are you maybe thinking it might leak so bad it will get cold engine compt air sucking back into motor and creating detonation or something,Smitty

Re: Can you use high temp.....
 

A leakey gasket will/can cause reversion while the motor is running. I've seen this happen mostly on the Gil Manifolds and CMI's. Personally, I never had any problems with my SM's but I always RTV'ed it along with high-temp gasket material.

Re: Can you use high temp.....
 

The Red Rtv Will Work Fine.if You Are Having A Problem With The Manifold To Riser Leaking Call Me This Should Not Happen And Will Cause Reversion

Re: Can you use high temp.....
 

Hey Daryle

Tell brownie the jet boat risers came out mint. We fired it up Sunday afternoon & idle @ 1800 rpm for 30 minutes. Snapped the throttle a few times and shook the house & the neighbors came to "visit".