Pyrometer Install; ATS Manifold

[Big MAK]

Alrighty then; we learn from eachother's mistakes so here's one for the lesson book.



Put my ATS exhaust manifold on this weekend. No problems. Took for a test drive and pyrometer won't go over 500 degrees. Either the ATS helps keep the engine really darn cool or the pyro is installed wrong . I think on it a while. Pull the pyrometer out and dang nab it I went and tightened that sucker down before taking a close look at the depth. The sensor isn't in the exhaust flow at all. I'm essentially measuring the manifold surface temp . Picking up new pyrometer today.



I wonder if this is the problem with some rigs that folks insist stay impossibly cool? :--)



In my own --feeble-- defense the ATS has a nice deep mount location so you have to put the pyro in farther then I was used to with my previous installs (holes in the stock manifolds of previous trucks). Compression fittings don't like to move once you've cranked down on them.

 

[FDavid]

Maybe I misread your post, but Is the ATS manifold already equipped with a bung for the pyro or did you have to drill and tap?



Dave

 

[TDragna]

Big Mak-Thanks for the info. My ATS manifold is sitting on my work bench. I'll be installing as soon as I install gauges. I will check the length of the pyro. Did you cut the water hose bracket or did you save it? Thats my only concern about the installation of the manifold. TDragna

 

[Big MAK]

There's a reinforced location to put the pyro; you still have to drill and tap. It's really sweet since it's deep enough that the mount bolt doesn't have to impeed the airlfow through the manifold.



I saved the water cooler bracket. Once you disconnect both ends of the tube from the heater hoses there's enough play to remove it (there's a short run of hose on the radiator side too).



The only thing that was a real pain was those bolt anti-backout crimps on the 6 and 5 manifold bolts. Had to rip them off to make any progress (they work atleast!). What's the concensus on the need to put those back on?



I plugged the tube on the radiator side with a 1/2 inch socket wrapped in a shop rag to keep the radiator from belching fluid more then a couple times (while I was searching for something to plug it with). I suppose there's a better way; pinch a hose upstream or something; but I went and took it apart w/o thinking that far ahead.

 

[Vaughn MacKenzie]

Big Mak I spent the extra $$ for the nice adjustable probe with compression fitting and used a dab of antisieze on the shaft. I have been able to loosen and readjust it after being in place for a length of time, as long as you go from shallow to deeper (otherwise you're dealing with carbon on the shaft).



Vaughn