ATS manifold improved capscrews?

[shawn huizenga]

Hello everyone. It seems a while back I read a thread where someone had found better fasteners/washers for the ATS 3 piece manifold. I've had mine on for quite some time now, and it seems the bolts start loosening up about every 5,000 miles. I was just wondering if there's a solution to that except for it being just another regular maintenance item. If anybody knows of a better way let me know.



Thanks



Shawn

 

[n7gxz]

You can use the stock bolts and spacers on all but the four (two on top and two below) center bolts.



Kevin

 

[shawn huizenga]

That'd work, but my pickup had the manifold on it when I got it, so I don't have the stock stuff anymore. Though if that's the best solution I guess I'll go snag factory bolts/spacers from Cummins



Shawn

 

[bmoeller]

Guess I'm lucky. Only had to retorque once, a few days after the manifold went on.

 

[Dipstick]

Hi Shawn: I just installed my ATS Intake Manifold so I don't have any history of problems. I can tell you that I used silicone compound on the threads when I was mounting the manifold. With the vibrations of the Cummins I use a thread coumound on every threaded fastner I put into the block. Hope this helps, Dipstick

 

[shawn huizenga]

maybe mine's just a fluke, but I tighten the heck out of those bolts and they always seem to back out again. Although I haven't used any type of thread compound on the bolts, I'll have to try that this time and see if it helps.



Shawn

 

[GOTSOOT]

Why not Safety wire them? holds on an Airplane!!

 

[rweis]

I have a LONG thread on the ATS capscrews and the reason they will not hold and the fix. Thread is about 2 years old. Short version.



Use OEM bolts with TSB dogbone keepers except on top 3,4. There use studs (52mm) and 3 Inconel Belleville washers, then a lock nut of your choice (safety wire is the best lock nut).



https://www.turbodieselregister.com/forums/showthread.php?t=80732 is the thread. Explains what and why.



Bob Weis