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Mod | | | Forums66 Topics128,035 Posts1,055,567 Members48,426 | | Most Online14,466
Apr 26th, 2026 | | AD Chevy Trucks  Over 6,000 pictures Brad Allen has an awesome collection of Chevrolet factory pictures that he has set up from film strips. Check them out!
Lots of work on Brad's part ... pure enjoyment (and references) for you!
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For helping keep this great
old truck web site
on the Internet for over 30 years! and not clogged down
with Ads!  Again, thanks!
| | | | Joined: May 2015 Posts: 236 Shop Shark | | Shop Shark Joined: May 2015 Posts: 236 | The top radiator hose is hot water coming from the engine, it flows through the radiator which dissipates the engine heat to the air, the water coming from the radiator is cooler and goes back into the engine.
A bad thermostat needs a water temp gauge to verify.
Heater hose can be very hot if there is full flow in them.
Would suggest a temp gauge be installed, if you do not want one in the dash then mount one in the engine compartment.
Or if none is wanted at all at least buy a HF handheld IR temp sensor, it can not measure direct water temperature but will measure approximate temps on the thermostat housing
Baking in the nice desert sun, breathing life back into a 48 3800 5 window.
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