Just installed my pyro and now I have a tick. I thought my tap job was pretty good. The coupler and pyro are tight. I even put some of that exaust putty around the whole thing. Anybody have this problem? Did I ruin my manifold and pyro?

 

Did you remove the manifold when installing the pyro? Where did you install the pyro in the manifold?

 

If you think there is a chance it is not sealed properly, simply go find a 1/2" NPT to 1/4" (or 1/8, depending on what you need) and redrill and retap the hole. Make sure that the bung is tight inside the manifold, and that the pyrometer compression fitting is tight inside the bung.

It is very doubtful that anything is "ruined".

 

Did not remove. Installed by back of manifold about an inch away from the up pipe. Exactly like Haypowers in his gallery.

 

Have you gotten under your truck to listen for the tick while it's running? There could be a leak around the pyro, even though you went the extra mile.

 

Yes, You cant hear it under the truck because the motor is so loud. Inside sounds like a timex. Tick tick tick. I'm going to put a 1/4 npt bolt or plug tonight and see if its my tap job or the pyro.

 

Maybe it has something to do with how you routed the pyro lead wire or maybe something else got moved and is now contacting part of the engine and resonating into the passenger compartment.

The GM 6.5 TDs have an aluminum heater coolant pipe that if it touches the injector lines you will hear a loud tick or knock in the passenger compartment from the heater core.

Bob

 

I just pulled my manifold. Not that easy. Its ticking because of my crapy tap job. I really feel like an idiot. Its too close to the flange bolts. The manifold has some extra metal in the inside that will pull the tap to the side. I had to retap that hole with 1/2 by 20th to get a good tight fit on a bolt. Yes I had to go that big, I really butchered it the first time. The bolt fits good and tight and I'm going to have it welded tomorrow just to make sure. My new pyro hole also came out great, nice and tight. The tapping was a lot easier off the truck. At least thats what I will keep telling myself tomorrow while I'm fighting the manifold and up-pipe. Hopefully I'll get my truck done by Fri and I'll let you all know how I make out. SCMT came back today and I've got an ich.

 

OK,
At the risk of sounding dumb, what does this "Pyro" do? In my field, a "Pyrometer" is used to detect the infrared heat signature of high speed turbine blades on military "augmented" jet engines.

 

Hi zoocrew5,

Welcome to the 6.0 forum and FTE. Please take a moment to review the Welcom sticky post at the top of the forum page. There are links to great threads and other info in there.

The pyrometer is used to measure the exhaust gas temperature.

 

In aviation world also known as EGT. I am looking into using an aviation EGT gauge in my truck the probe goes in much easier just drill an 1/8" hole then it is held in with a hose clamp. The gauges are also cheaper.