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Topic: Is an exhaust temperature sensor part of the standard stuff? (Read 1030 times) previous topic - next topic

Is an exhaust temperature sensor part of the standard stuff?

I am getting to know our new to us 94 U-240, and I found a temperature probe between the turbo and the Pac-brake.  The tube leads to what looks like a sensor on the inside firewall, with a green wire that disappears into the loom.  Is this part of the engine or trans management system, or am I missing a gauge?

Cat 3116 and MD 3060
Matt B
94 U-240
Matt B
1998 u-320

Re: Is an exhaust temperature sensor part of the standard stuff?

Reply #1 –
bump!  Someone go out and lift up their bed!

Matt B
Matt B
1998 u-320

Re: Is an exhaust temperature sensor part of the standard stuff?

Reply #2 –
Matt,
I think that's a aftermarket add-on to your coach.  It's call a pyrometer and should feed to a gauge on the dash.  It's usually used on diesels that have been "souped-up" to let you know when to back off on the throttle before you damage the engine.  I don't know of any Foretravels where this was standard equipment.
John Fitzgerald
1991 U300 (SAI) Side Aisle Island Bed 40'
Detroit 6V92 with Allison Retarder
Meridian (Boise), Idaho

Re: Is an exhaust temperature sensor part of the standard stuff?

Reply #3 –
An EGT (exhaust gas temperature) gauge was one of the things I added to our U270 (got it from Banks).  (I think  Barry Leavitt has one also.)  I use it as another indication about when to slow down on a long hill climb, and also to tell when it's safe to shut the engine down without toasting the oil in the turbo.  Also good as an early indication of a misbehaving engine, although I haven't had any misbehaving (e.g. engine running too rich) so far after installing it.  Probably what it really is, is "comfort food" for the gauge junkies among us :))...
Dave and Nancy
1999/2013 U270 36' Xtreme
Motorcade # 16774
2013 Subaru Outback
KD0NIM

Re: Is an exhaust temperature sensor part of the standard stuff?

Reply #4 –
Not OE (Original Equipment).
Brett Wolfe
EX: 1993 U240
Moderator, ForeForum 2001-
Moderator Diesel RV Club 2002-
Moderator, FMCA Forum 2009-2020
Chairman FMCA Technical Advisory Committee 2011-2020

Re: Is an exhaust temperature sensor part of the standard stuff?

Reply #5 –
We had a pyrometer on our recently-sold Safari Trek, and it was my main gauge for mountain climbing.  When the temperature hit 1200, I would downshift to keep things from cooking.  Would like to have the feature on the FT.

I will try to trace the wire on the FT when I am out there again.  The installation looks professional or factory, and the wire from the sensor disappears into one of the looms.
Matt B
1998 u-320

Re: Is an exhaust temperature sensor part of the standard stuff?

Reply #6 –
Cummins Data:  Max Turbo Temp in/out of exhaust side  1400f inlet and 1200f outlet.  Much above these limits and the valves start to flow out the exhaust in liquid form.

Re: Is an exhaust temperature sensor part of the standard stuff?

Reply #7 –
I try to stay below 900 at the turbo outlet (I installed the pyrometer in the exhaust pipe after the turbo).  The Cummins tech I talked to said stay below 1200 before the turbo, and there would be about a 300 deg drop through the turbo.  So that's consistent with Dave M's data, with a little safety margin.
Dave and Nancy
1999/2013 U270 36' Xtreme
Motorcade # 16774
2013 Subaru Outback
KD0NIM