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Old 09-05-2021, 06:17 PM   #1
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Loud squealing coming from the engine bay

I am not sure, but I am driving back from Oregon to Texas. I am traveling at 68 mph and 1750 rpm. My temperature goes from 192 to 210,l then goes back down, but then climbs back up to 215 or so. The elevation has not changed, nor the speed or rpms.

I get into town for the night and hear a loud squealing coming from the engine bay. Could this be a water pump issue?
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Old 09-05-2021, 07:08 PM   #2
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What engine?
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Old 09-05-2021, 07:19 PM   #3
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My first check would be the belt tensioner, often a bearing goes out on them. Also check the serpentine belt for any indications of wear where you suspect something locking up. That will usually tear the belt in no time.
215 seems a bit high to me, my rig never runs this hot but best is if you know the history of usual temps for your engine. Later engines had different exhaust requirements and Cummins changed the thermostat causing the engine to run a bit hotter. Mine is 187-197 most of the time no matter how steep the climb.
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Old 09-05-2021, 07:31 PM   #4
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Quote:
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What engine?
2006 Alpine would be 400 ISL.
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Old 09-05-2021, 08:22 PM   #5
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2006 Alpine would be 400 ISL.
Yes, 400ISL.

Was able to find a mechanic who pulled of a damaged belt tensioner. Now to try to find the part in Tonopah, NV.
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Old 09-05-2021, 08:35 PM   #6
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NAPA should be able to get it. I've replaced my several times over the years and NAPA has been a go-to place for a replacement.
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Old 09-05-2021, 08:40 PM   #7
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NAPA should be able to get it. I've replaced my several times over the years and NAPA has been a go-to place for a replacement.
Yes, it’s a dayco part which they carry. There is one 1 Mike up the road. Will check in the morning.
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Old 09-05-2021, 08:43 PM   #8
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You don’t need the whole part, just the pulley. Or, just change the ball bearings…

Most any Napa or auto part stores have suitable pulleys…
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Old 09-06-2021, 11:27 AM   #9
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It looks a lot like a 89446 dayco. I sell parts and dont ask me why the number popped in my head I am at home
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Old 09-06-2021, 12:32 PM   #10
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While you're at it, I'd replace the compressor belt as well, looks frayed in the photo.
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Old 09-06-2021, 04:09 PM   #11
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This may be helpful:
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Old 09-06-2021, 05:07 PM   #12
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It looks a lot like a 89446 dayco. I sell parts and dont ask me why the number popped in my head I am at home
My part says 1179 Dayco. Is that the same?
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Old 09-06-2021, 05:08 PM   #13
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NAPA should be able to get it. I've replaced my several times over the years and NAPA has been a go-to place for a replacement.
Why, does it go bad that often? I might consider buying 2 then and a replacement belt for each belt in the bus.
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Old 09-06-2021, 08:43 PM   #14
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My part says 1179 Dayco. Is that the same?

Not sure we do a lot of Whipple superchargers and that looks like the same tensioner we use
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