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Old 09-01-2013, 06:31 PM   #15
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1983 28' Airstream 280
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UPDATE:

Replaced the bags in the front coils, did a tune up on the 6.5 Onan generator, and had my propane system pressure tested and filled. generator runs like new! a bit loud though.

my next concern is it seems to be running a bit hot when the engine is under load. ie freeway driving at 50-55mph. and only under load. the temps drop back down to just under the 200 mark if im in traffic or around town driving.

i was gonna test the thermostat to make sure its opening all the way first. where can i buy a new thermostat for it? 5.8l Isuzu turbo diesel

i feel like a thermostat should be easy to find locally as so many fit multiple applications
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Old 09-01-2013, 07:04 PM   #16
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UPDATE:

Replaced the bags in the front coils, did a tune up on the 6.5 Onan generator, and had my propane system pressure tested and filled. generator runs like new! a bit loud though.

my next concern is it seems to be running a bit hot when the engine is under load. ie freeway driving at 50-55mph. and only under load. the temps drop back down to just under the 200 mark if im in traffic or around town driving.

i was gonna test the thermostat to make sure its opening all the way first. where can i buy a new thermostat for it? 5.8l Isuzu turbo diesel

i feel like a thermostat should be easy to find locally as so many fit multiple applications
You might be lugging it down a bit too much. Especially if you are operating without an EGT (pyrometer). A lower gear might be in order.
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Old 09-01-2013, 11:52 PM   #17
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You might consider pulling the radiator and having it boiled and rodded. With the proper fan belts and a clean radiator mine runs cool. It never gets over 180 unless on a pretty steep grade. The PO had lots of overheating problems for years. When I got the coach I discovered two new 7/16" auto fan belts. Apparently somebody years ago put the wrong belts on and ever since they were replaced with the same incorrect belts. The radiator had been replaced and the engine rebuilt and it still had the same incorrect belts. With the proper 3/4" belts it needs a cover over the radiator to get it up to 180 during the cold winter months.

Glad to hear everything else is doing well.
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Old 09-02-2013, 10:05 AM   #18
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Glad to hear the old bird fired up easily. Just like the Toyota/Hino 3B in a Toyota Landcruiser they're generally hard to kill.

That being said, running them hot is never a good thing. My water gauge like Dan's reads under 180, unless I'm pushing it up a hill. If your belts are tight, your coolant levels are up and your thermostat is operating properly. I would maybe check the accuracy of your gauge before going onto the more expensive things like rebuilding rads.

I have learnt to distrust my gauges unless they tell me want I want to see MOST of the time. My amps are zero all the time. I'm pushing 2.5 million volts by the way my volt gauge rockets off the deep end upon start up. I had no turbo until I found the connection was disconnected on the upper plenum of the motor. My oil pressure reads normal then has a seizure and rockets to 100psi, only to drop back down to just over 40 most of the time.

These gauges are old and are NOT Smith gauges. Smith gauges if they are telling you info you DON'T want to see (say no fuel), you only have to tap them to have them tell you the truth (voila, full tank). Or visa versa.

I would get an infa red temperature reader and take the beast for a run and take some readings off the rad or better yet the thermostat housing to get a better picture of what's going on.

FYI a EGT gauge (or Pyrometer) is a must with a diesel. I'm surprised you don't have one as my 83 310 turbo came with a BAE turbo and Pyrometer gauges.

Also someone stated your tranny would be a turbo 400.....mine is the straight geared turbo 475 motorhome/school bus tranny. A truck repair place would be able to double check it for you.

Cheers
Tony
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Old 09-02-2013, 11:39 AM   #19
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I am in agreement that the gauges are the first to go: the were not exactly Stewart-Warner. Also suprised there is no pyrometer, do you even have a boost gauge? All my gauges are now made by: ISSPRO.com - Quality Gauges, Tachometers, Speedometers and more!
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Old 09-02-2013, 01:55 PM   #20
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Ok, so ill make sure to get a more accurate reading on water temp before i do too much. Anyone know where to get a new Thermostat just in case?

i do have a turbo boost gauge, its pretty much seized though. i need to tap at it if i want any kind of reading from it. it does not have a pyrometer though. where would you recommend i buy replacement gauges? i'm going to be redoing the dash anyways.
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Old 09-02-2013, 02:30 PM   #21
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Ok, so ill make sure to get a more accurate reading on water temp before i do too much. Anyone know where to get a new Thermostat just in case?

i do have a turbo boost gauge, its pretty much seized though. i need to tap at it if i want any kind of reading from it. it does not have a pyrometer though. where would you recommend i buy replacement gauges? i'm going to be redoing the dash anyways.
Go to Hamilton for your thermostat, I'm not sure that it is common like a Ford or Chevy but I don't know for sure.

Isspro makes a good gauge but I don't know that they are as good as they once were. I have one of their pyrometers on a 1954 truck that works just fine but I replaced the one in my Airstream with an Isspro electronic gauge and it has never worked properly. They did attempt to make it right but I was on the road on the east coast and shipping parts to where I might be became more trouble than it was worth. I also have an Isspro tach and pyrometer in my pick up and after six years the pyrometer is fine but the tach has failed.
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Old 09-02-2013, 03:42 PM   #22
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Does your right hand side gauge cluster look like ths?
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Old 09-02-2013, 07:34 PM   #23
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Hey! How come I don't have a fake wood burled 80's dashboard?? Sniff Mine looks like someone hit it with Rhino lining.

Not so cheery
Tony
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Old 09-02-2013, 11:44 PM   #24
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nope, gauge cluster looks more like this.

on the right panel there's the boost gauge and the transmission temp if I'm not mistaken.

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Old 09-03-2013, 02:11 AM   #25
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nope, gauge cluster looks more like this.

on the right panel there's the boost gauge and the transmission temp if I'm not mistaken.

That gauge to the right of the boost should be the pyrometer. I can't tell from the picture for sure but what I can see of the numbers sure looks like the original pyrometer. A straight on picture will tell for sure. If it's working properly cruising on flat road at 50 - 55 mph should read around 600 deg. Idle might be around 300 deg. and heavy acceleration or climbing a steep grade will bring it up to 1100 - 1200 deg. Over 1250 deg. and you start asking for trouble.
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Old 09-03-2013, 05:26 AM   #26
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Identical panel layout to mine.
Dans's right about the Pyro. Not tranny temp. The highest I've seen under full accel up a hill was maybe 1050-1100.
Pop the doghouse and the turbo boost gauge line goes into the intake plenum. Check that it is free of gunk for accurate reading.
Looks like a nice rig. Wouldn't mind seeing some more pics to compare layout with my 310.

Of note. I was allways curious why there was no light indicator beside the glowplug push button in my rig. There's just an open hole. of sorts?????? What does your glowplug indicator thing do when you push your glowplug button? It looks like you just have a hole at the center of that big bezel as well?

Cheered up
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