Jim Lane

So I am having this persistent exhaust leak at the flanges between the manifold and the head, not very bad but I know it is there.

I had replaced the gaskets about a year ago and now I am starting to hear a faint leak again.

Has anyone ever used 2 sets of gaskets back to back with the sealing ridge on both sides?
Seems this would seal leak.

I bought a FelPro gasket set and they are embossed metal, are the Cummins any better or are there extra thick gaskets avalible?

Some day I need to pull the head to fix a slight oil leak and I will have all of the surfaces machined.

I have had this oil leak for the last 5-6 years.

Jim

MrFusion

I haven't doubled up the gaskets but I just installed an ATS 3 piece manifold and as a matter of course sprayed both side of the new gaskets with copper head gasket spray. I haven't started it yet so I can't say if it sealed.

oliver foster

I have worked on several old 12V motors with multiple metal gaskets between the head and the exhaust manifold.
They where installed by the P.O. but seemed to be working when I got the truck.

1972RedNeck

I have used up to four gaskets on each port to try to get an old warped manifold/head to seal up. Seems to work fine for me.

thrashingcows

I've never installed a cummins manifold....yet...but I have always used high temp RTV on both sides of the gaskets and tightened it down the manifold. Usually seals up fine, and I've installed some nasty manifolds over the years.

jimbo486

Have you tried the manifold I gave you last year sometime?

The MLS (multi-layered steel) gaskets are said to be for the instance when a surface is not quite true.

sooty

have you checked to see if the manifold is warped? use straight edge or other known flat surface, I have one that shows .015" of variation at the rear two ports, same deal, kept blowing its seal, or bolts would come loose.

MrFusion

Anyone ever try a Remflex gasket? Looks like P/N 6017. They advertise that they are designed for use with warped or out-of-true manifolds. $40 on Epay.

Jim Lane

Anyone know the torque specs for the exhaust manifold bolts?
I am going to attempt to replace the gaskets hopefully this next week.,

I am going to use 2 gaskets back to back and seal them using copper coat I between the two, this way I should have twice the crush to hopefully keep it from leaking.

Someday the head with have to come off and be resurfaced and then I will probably also install studs.

thomasg

its 32 ft. lbs.

torquefan

I have used Permatex Ultra Copper high temp silicone sealant to mount many exhaust manifolds on gasoline engines, without a gasket, and it has never caused a problem. I have never used it on a Cummins manifold, but on a problem manifold, I would give it a try, using a bit on each side of the gasket.

j.fonder

I think we can be a bit more reserved in the event you were poking, in the event you were serious, cut it out.

-Pat

Jim Lane

Mr. J.Fonder,
Please explain to me how is this a haphazardly repair?
I see this no different than buying a set of “Extra Thick” or “laminated” manifold gaskets for the purpose of repairing a slightly warped manifold from my local auto parts.

Since 1964, 1974 professionally,
I have worked on gasoline, alcohol, nitromethane, LNG, CNG, diesel both Spark and Compression ignited, yes, spark ignited diesel, 4-71, 6-71, 8-71 and 92 series roots blown Detroit’s, turbocharged intercooled, aftercooled 2-stroke cycle 4-stroke cycle engines from single cylinder to 16 cylinder from automobiles, class-8 trucks, transit coaches, construction equipment, county owned equipment, standby gensets.
I was also a heavy truck and coach electrician.

Oh yea, and besides knowing mechanics, I am also an electrician and have studied and worked in electronics since the say late 50’s and grew up on something called a vacuum tube, (most people here have never heard of one) I saw the transistor come into existence and then the IC so yes I do know my electrical and electronics but most people here already know that.

My truck is my personal/ work vehicle.
I have been an electrician for the last 25 years, and I am on call 24-7 so my truck must run at all times.

Any maintenance on my truck must be able to be done within 6-8 hours and then it is back in service.

At the present time I can not afford the time to have the head in the shop for machine work, so if I can stop the slight ticking sound by making my own laminated gaskets and it will not hurt the engine I will give it a try, it is only going to cost me $12.00.

If it works I will let others know and hopefully it will help others on this forum, for me, that is what it is all about, helping others, check the sticky and see how many articles I have published.


I have never jury-rigged, mickey-moused, duct tape/bailing wired, haphazardly repaired anything.

Everything I do has been carefully thought out, researched, googled, opinions asked of the masses before I will put it into use.

As a mechanic there has never been anything that I could not start or drag back into the yard and repair.

I have made many tools, jigs, test adapters, black boxes, blue boxes, buzz boxes and have amazed many professionals with my knowledge.

I do not claim to know everything but I do know what I am talking about when I say something.

I really do not even know you,

Why would you say something sarcastic like this to me?
Jim

Lary Ellis (Top)

When I see someone openly attack another member in the forums for no apparent reason I have to wonder what the heck the underlying issue is.

I know that other forums not only allow daily "Badgering" between members but some seem to welcome it.....good for them they can do anything they like after all the forums belong to them. But from the first day this forum began we chose to do things differently here, we wanted this to be a place where folks could share ideas without all the silly drama that runs rampant elsewhere on the Internet.

I find it disconcerting as well that the abuse is pointed at someone like "Jim Lane"...having read his posts since 2004 I know him to be a courteous and thoughtful individual....one who openly shares his ideas and experiences for others with never a harsh word for anyone. I never see him demand that his way is the ONLY way, only that for his specific situation this is how he went about solving a problem.

That is what this forum was created for, and I for one thank Jim for taking the time to share his ideas with the rest of us. Most people come to a place like this and take away with out ever giving back, it is people like Jim that make a forum great by spending a few moments to talk about his projects.

I am taking this opportunity to post a copy of the forum rules, I think a refresher is warranted in this case. I am marking a few spots in bold as they apply to the situation we have in this thread. My apologies to the OP for hijacking but I am hoping it leads to a better understanding about being respectful to others when visiting this Forum.

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93flatbed

Stud it and buy the thick copper gaskets. I see no point in trying to double a gasket with some sort of goo trying to take up space, or whatever your plan is/was. I see it being a waste money, time and effort when the thick copper gaskets give out and studs loose torque then it's time to do it right.

Don't tell me/us your idea'r is the same as a good gasket designed to take up space for people not wanting to do the job correctly.

Also never assume you know more than another man and or have more experience in the given field. If you want to do that I'll start listing my certs and things I've done that no one else has. Knowing when to walk away is a trait most people never attribute to greatness, but should be held higher than anything when judgment is passed onto another. If the guy bothered you let it go, and live to fight your next battle.

This next part isn't directed to Jim.
As for this whole new safe space junk.... sigh, I have no idea what to say about that. If the internet is to scary of a place to be I really have no idea how most people live their life's. If you can't take a joke or even an out right attack on a keyboard then how scary is it to be in front of another man? Man up and roll with the punches!