Offy 3x1 "O" ring continuing problem

[mustang652]

With the info posted to my torque question yesterday and the help of a friend, I got the head toqued down and the adjustable rockers installed and initally adjusted. I want to tackle the Offy adapter tomorrow. I understand that for a better seal to the log, it's best to use a gasket sealer or adheasive when placing to two orings. What should I use.

 

[JOHN G]

I actually went a little further. Before final assembly, I put a layer of jb weld around the openings with a layer of saran wrap on top of that(on the head,not the manifold). I then placed the manifold with the o rings in place and just snugged it down for the night. When removed the next day,what you're left with is nice little seats for the rings to sit in. I still used rtv blue during final assembly-I have never had a leak to this point!

 

[Junk-Falcon]

i used

 

[mustang652]

Thanks for the info, Hope to get started back on it today. I'd lke to try to get it running over the next week.

 

[Hot 6t Falcon]

You can get Offy o-rings at any hardware store. They'll have a case of assorted sizes. Then you can use sticky sillycone and the o-ring.

Over kill is good - you don't want any vacuum leaks.

Good Luck

 

[mustang652]

Thanks, I wondered what kind of hassel it would be when I needed to replace the o rings I have now. On that issue, I am definately into overkill. I'm giving the JB Weld a try tonight. Going to be a mess to clean up as I waited over thirty minutes an it was still a little more runny than I really liked. Will also use plenty of the silicon when I do assembly. Thanks again to all.

 

[CobraSix]

My O ring gaskets worked great until I had a massive back fire that blew on out. I then just used JB Weld on the inside of the manifold while the manifold was in place, basically making it part of the head. It wasn't too hard to take off though when I got rid of it.

Slade

 

[mustang652]

Unfortunately I'm not having a lot of luck with the JB. As I already have the head in place, it a real pain and I don't want to remove the head again unless it's absolutely necessary. First time JBs way too runny even after the suggested fifteen minute wait for material to set up. Second time after waiting well over half an hour for initial material set up, still ended up a little too runny and did not end up with it thick enough to give a good impression of the o ring. I'm begining to wonder if I shouldn't have bought myself a two barrell and had a machine shop do the adapter milling and installation. Oh well, had I done that, just look at the fun I would have missed. Guess like most projects, once I get it running, I'll quickly forget how big a PIA it was to get it where I want it. If this idea fails, I may take up Cobra Six on his idea. Thanks for the continued imput as I do need the help.

 

[mustang652]

The bright idea of using cut down carb flang gaskets ended up being not being very bright at all. The o rings on both ends of the log make solid contact with the sides of the log well before it seats on the top leaving a gap between the ring and the top of the log. With the extra gasket or without, I still end up with an 1/8 in gap on the top side of the log which I am not comfortable with using silicon as a filler. Well the short of it is that I'll be headed back to the parts store later this morning for another package of the JB Weld and will go for round three. I'd be a little more confident in using it if I could find a point where it was a quite a bit thicker, like the old 2 part epoxy putty sticks that you could shape before setting in place.

 

[Stubby]

You can use Manley A/B epoxy.

Make sure you are mixing the right ratio.

 

[mustang652]

Haven't run into that on yet, where would I find it.

 

[Stubby]

It would be a race shop. The same Manley who makes valves and rods. It is a putty type, cut off two chunks and kneed them together.

JB weld works for most things. You can also get JB Quick which sets up faster. Maybe too fast.

You can use a little heat to speed up the cure time on JB Weld. A light bulb in close proximity will heat pretty well.

 

[wallaka]

Probably any metal/putty epoxy would work well, like the stuff used for exhaust leaks.

 

[Anonymous]

When I installed mine, someone on here told me to ditch the o rings altogether and use gasket paper and silicone. I bought the thickest gasket paper NAPA sells, called "victo-pack" and slathered both sides with ultra gray RTV, the stuff that looks metallic, and haven't had a leak since. I daily drive my car most of the year, I have about 18000 miles on it with no problems.