air in coolant or clog?
Thread Starter
Melting Slicks
Joined: Feb 2014
Posts: 2,725
Likes: 149
From: chicago area IL.
air in coolant or clog?
so....
i finally got the new engine in my car, having an issue with it getting hot while idling but soon as i start to rev it or drive temps drop? i've seen 240's just while idling if i hold rpms up a little 1500-2000 temps drop. hose going to the radiator i can keep my hands on them (only warm) heater core hoses get hot cant touch them, i bleed the steam port, let it idle with cap off a few times, did the hole 3000 rpms thing a few times. thinking maybe the radiator is clogged?
im lost on where to go from here
i finally got the new engine in my car, having an issue with it getting hot while idling but soon as i start to rev it or drive temps drop? i've seen 240's just while idling if i hold rpms up a little 1500-2000 temps drop. hose going to the radiator i can keep my hands on them (only warm) heater core hoses get hot cant touch them, i bleed the steam port, let it idle with cap off a few times, did the hole 3000 rpms thing a few times. thinking maybe the radiator is clogged?
im lost on where to go from here
Pro
Joined: Oct 2020
Posts: 529
Likes: 197
From: Columbus, MS
What engine, what radiator? I've got a similar thing with my LS3 and Dewitt's radiator. It will get up to about 240 or so on initial warmup, then the temp will drop rapidly and stay around 200 all day long. After your temp drops initially will it climb back up?
Thread Starter
Melting Slicks
Joined: Feb 2014
Posts: 2,725
Likes: 149
From: chicago area IL.
Using stock fans and radiator, the fans are working correctly low/hi and are starting at 195 low 205 hi
going to swap the thermostat today see if thats it, if not probably pickup a ECP aluminum radiator
going to swap the thermostat today see if thats it, if not probably pickup a ECP aluminum radiator
Last edited by Stroker87; Oct 4, 2020 at 09:12 AM.
Thread Starter
Melting Slicks
Joined: Feb 2014
Posts: 2,725
Likes: 149
From: chicago area IL.
if its not the thermostat witch ill know in a few hours then has to be the radiator at this point im pretty sure its not air in the system
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Tech Contributor
Joined: Dec 1999
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From: Anthony TX
CI 6,7,8,9,11 Vet
St. Jude Donor '08
Have you tried to clean the radiator and the AC Condenser?? There is a 1" space between them and that space can collect a LOT of trash/sand/dirt, grass and stuff... I use a garden gose and back flush the radiator. You would be amazed on the sand and dirt that comes out. DO NOT use a pressure washer.
Bill
Bill
Thread Starter
Melting Slicks
Joined: Feb 2014
Posts: 2,725
Likes: 149
From: chicago area IL.
I drained the radiator then installed a 187* thermostat filled it up bled the system and now got rock solid temps idling between 198 & 201 let it idle for 45 minutes then drove it so it looks like its all good now
thanks for the input!
yeah i did that about 3 years go (cars been sitting since the old engine let go) but that season i pulled the radiator out and washed it down and it was dirty!
thanks for the input!
Have you tried to clean the radiator and the AC Condenser?? There is a 1" space between them and that space can collect a LOT of trash/sand/dirt, grass and stuff... I use a garden gose and back flush the radiator. You would be amazed on the sand and dirt that comes out. DO NOT use a pressure washer.
Bill
Bill