[Archived]

That appears to be a pyrometer which is rare on a Series 60. If it is a pyrometer you can try to remove it carefully with liberal amounts of pentrating oil, but if it doesn’t come out in one piece it isn’t a big deal as I recall. They are relatively cheap as I remember and I might even have a new one because they had a somewhat short life span.

[Archived]

Thanks Jon. I have been putting oil on it for a day. I will probably cut the wire and get a new one. It is froze in pretty good.

Thanks again.

Craig

[Harry]

GM makes a foaming penetrating oil that works really well.

Have you tried heat? Take a torch and heat the bung so that it expands and try to get the fitting out with a good stiff line wrench (the cheap ones flex too much) or just cut the wire and use a socket. Work it back and forth and let the penetrating oil work it’s way in. I’d replace the sensor but try whatever I could to save the bung.

[Archived]

B after further inspection, The exhaust pipe has about a 5 inch crack right behind the bung. I decided not to weld it up. I ordered a new pipe.

Thanks

Craig

[Archived]

This thread has confused me from the start and now I am even more confused. I mentioned previously about how rare it was for a series 60 to have a pyrometer. But the signature line says series 60.

After seeing the photo above I will stick my neck out further and repeat that while I may be wrong and confused I am now questioning if the engine is a series 60.

A series 60 is a straight 6 cylnder engine, usually with a greenish blue or bluish green color. The 8V92 engine which was commonly equipped with dual pyrometers was silver and was a V configuration. Which engine is it? Picture?

I am sure I have a pyro and I can send it if I get home by the time it is needed. I am on the road now until next Tuesday.

[Darrell]

Good Morning Jon: Yes it is indeed a series 60 and even with OTR. The chassis is a September of 1994 build Engine serial # 06RO145096. Per Prevost that is when they switched.

[Archived]

You have a double rare series 60. First, because it has a pyrometer, but second you are the first who has ever mentioned a cracked exhaust manifold.

Cracked exhaust manifolds on 8V92 were as common as fleas on a dog.

[AL]

Jon my 94 had a pyrometer, didn’t have a cracked manifold though.

[Archived]

I wonder if the series 60 engines with a pyro were a throw back to owners of 8V92 engines being used to them and expecting them?

On the 8V92 I considered them a valuable gauge to have.

[Deleted User]

Where does the Boost gauge for turbo get signal from? I have a Boost gauge but not a temp for exhaust.

[Dick]

FWIW, I believe that’s a cracked downpipe, not a manifold. Ideally the pyro would be on the manifold though. Craig, did you have a hard time sourcing the part with the pyrometer bung?

[Doug]

Prevost had the exhaust pipe in stock I came with the bung welded in place. Prevost part # 04087 at the bargain price of $233.46

[Craig]

There is a separate boost sensor with a tube running to the top of the blower box(?) and an electronic signal send from there to the gauge. The older coaches actually had a tiny tube that connects to the boost gauge as well.