Mr. Gasket 260 - Intake Manifold Gasket Set | O'Reilly Auto Parts

In my neck'o'the-woods, The always have 2 order'm, but it comes next day for $15.99.

 

A quick word about the remflex, I asked my machinist about it and he said he wouldn't use it on an I6. The graphite material it's composed of works great for sealing pressure but doesn't work very well for sealing vacuum.

Just my $0.02

Sam

 

I was wrong! I thought I had seen it on Summit for the price I mentioned. I think the Remflex would be good for someone having issues getting a seal with conventional gaskets.

Regarding the machinist: It seals against pressure, but not against vacuum? That doesn't make sense to me. If the air is being pushed at it to escape it will seal, but not when air is sucked at it? Am I wrong, or is a seal a seal?

 

Toss that iron pretzel into the scrappy bin and put on a pair of 3 into 1 EFI manifolds. Sure, you have to do some mod work, but you'll pick up a couple ponies in the process.

Serving suggestion......

 

If I remember correctly he said that since the graphite is very brittle, the vacuum will start to suck in little bits of it. Being constantly exposed to gasoline doesn't help either.

They work great on the exhaust side (used them and seen them on a couple v8s with pretty good success), just not so much on the intake.

Sam

 

Thanks for explaining that. Now I understand.

 

I have been thinking of trying on of these ..

Felpro/Intake Manifold Gasket (MS93837) | AutoZone.com

it's basically a Felpro version for an EFI motor thru 92. Since I use an EFI exh manifold and have the extra three mount holes for the manifold since I use an EFI head, I like the idea of hanging both exhaust manifolds on the heads tightening the extra holes just snug enuf for the fit, then adding the intake assembly. When you use a "260" with an EFI head there is no gasket material for these mount holes. (I am careful when tightening them)

For this reason although I now use a "260" I have been curious to try the EFI set lower. the price isn't too bad, $20.

I notice that they too are graphite composiste, but at least a Felpro, and somewhat less expensive..another alternative.

here's another option for the rock-auto fans..

http://www.rockauto.com/catalog/x,ca...parttype,10220

 

 

I know this is like 5 years too late. But this is a reply to Sam's response in post #20. I've asked the people at Remflex about this and they said it won't break down under vacuum or gasoline exposure. And I've never had any problem with them.

 

Love these “best practices” threads, especially when it comes to one of our critical program content issues GASKETING. Your personal experience, openly shared on this subject, right here on this Forum and in this thread is appreciated by our team and very important to our quest for excellence/user friendly outcomes.A little History on the origin of the well-known #260 Mr. Gasket is in order. The 260 1-piece fiber composite gasket, for the 240/300 3.9 & 4.9L engines began with its public release in 1972. Way back then, my key contact at Mr Gasket, cultivated while employed by Fomoco in their Motorsports efforts, was Rich Smith. He and other aftermarket manufacturers’ key personnel routinely spoke with yours truly [Bruce Sizemore aka on our Forum as Gramps/ worldchampgramp] to “fetch” and send them genuine Ford factory production blue prints. Whether it was Crane Cams, Edelbrock, Mr. Gasket or others they all found or were directed to “Gramps” the problem solver. ALL of this took place before I was able to campaign my first notable ¼ mile ride the infamous Preparation H Maverick as none of personally could own or even drive a competitive off-road vehicle. This was a NO NO in Ford Motorsports employment and a violation meant your out-of-here.Reason for this background is the 100% accurate statement that if it were NOT for my association with Rich Smith there probably would not be a #260 gasket ever. Likewise, there was a little known one piece “Sizemore” Mr Gasket Boss 351C gasket, specifically developed for my second crowd pleasing Ford I/Gas Pinto “terror among the NHRA ranks” from mid to late 1970’s. . Both of these notable rides are summarized in a history pic format even with a YouTube Video right here for your viewing pleasure https://www.ford-trucks.com/forums/1547453-entry-level-street-strip-head.html then scroll to post #47 and #50. . A summary of what all of you have clearly articulated in this gasket/no gasket thread will be reviewed by ALL of our team members. For it is this type of hands-on direct involvement expertise shared by all of you we value and making our product content decisions. Please rest assured that when we release the next kick butt Max Flow u-head WE will offer to all a proprietary one or two piece (TBD) absolutely bullet proof reasonably priced Sizemore Performance alternative. Hey might as well place my name on another gasket product, 45 years is too long an interval…don’t you think?? Now back tommy cold breakfast. Bruce

 

??? That thread only has 3 posts. Do you mean the main head thread (that I've been following) where you show your past NHRA heritage in response to FTE member mary-kate? https://www.ford-trucks.com/forums/1...options-4.html

 

You are correct the proper liik is www.Ford-Trucks.com/forums/1539201-very-exciting-news-three-new-cylinder-head-options-4.html Then you can scroll down to post #47 and #50 for lots

 

Here's my experience: brand new intake manifold and exhuast manifold and Enginetech gasket kit. Still has a small leak after doing it.

I bolted the intake and exhaust manifolds together before I torqued the exhaust manifold bolts. Someone mentioned in this thread that you should not do this, so maybe that's why I'm having a problem.

It's either that, or engine tech gasket suck. Who knows?

I followed the torque sequence for the exhaust manifold bolts like a bible... so this sucks. So much goddamn work to redo this job... not to mention it's really hard to pull the manifold out of there.

 

There's a lot going on in that assembly. Sometimes there are differences in flange thickness. That can lead to leaks. If that is the case it can require a custom ground washers/spreaders so it applies equal force to both manifolds flanges.

Something else I like to do is apply a thin coat of high temp RTV to each side of the gasket/s.

 

I really should have used RTV... Welp...

Wish me luck, I'm pulling the entire thing off for the second time.

Going with a Remflex gasket. Remflex said to not use RTV when installing, and the torque specs are a little different.

If I have an exhaust leak after this god help me.