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Old 01-27-2022, 10:53 PM   #1
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Coolant sight glass

I have a 2004 Rexall Roseair on a workhorse chassis with a 8.9 Cummins 400. It is a rear radiator so the coolant sight glass is hidden behind the radiator shroud. There seems to be an access panel but I tried to remove it with no luck.

Anybody have some trick to see the level of the coolant in the sight glass?
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Old 01-28-2022, 02:36 AM   #2
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I have never seen a sightglass on a radiator only on aftermarket surge tanks. Maybe it's some sort of plugged port your seeing. Do you have an overflow/surge tank that's the level your interested in. If by some odd design it still has a cap on radiator and no pressure overflow tank, not a bad idea to check radiator when cool once in a while to make sure rad. cap if flowing both ways and radiator is dead full/no air at top.
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Old 01-28-2022, 07:03 AM   #3
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The sight glass is on a pressurized surge tank. It is factory because instructions for checking it are in the manual. It doesn't give instructions for gaining access. It just says to check the sight glass.
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Old 01-28-2022, 04:27 PM   #4
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Quote:
Originally Posted by bduemig View Post
The sight glass is on a pressurized surge tank. It is factory because instructions for checking it are in the manual. It doesn't give instructions for gaining access. It just says to check the sight glass.


My Spartan chassis has what you describe but itís in plain site. Iím not familiar with a workhorse pusher chassis.
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Old 01-28-2022, 10:55 PM   #5
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Post some pics for ideas ,the phone app is easy to post pics. You can take and send a pic right on the post your creating. Can't you just remove radiator cap on tank, dip it with a bamboo skewer, chopstick something.
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Old 01-28-2022, 11:42 PM   #6
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Someone in another post talked about creating a dip stick because the sight glass w was stained. Sounds like a good idea.
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Old 01-29-2022, 03:22 PM   #7
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Someone in another post talked about creating a dip stick because the sight glass w was stained. Sounds like a good idea.
That is what I had to do. Sight glass has turned opaque.
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Old 01-29-2022, 11:29 PM   #8
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What did you use to make your dipstick?
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Old 01-30-2022, 07:42 AM   #9
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What did you use to make your dipstick?
A piece of wooden dowel.
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