overheating at idle - Page 2 - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**1970cstblazer** · 05-21-2024, 11:50 AM

You either have worn engine mounts, or the core support bushings are incorrect.

vardenafil · 05-21-2024, 12:32 PM

Quote:

Originally Posted by 1970cstblazer

You either have worn engine mounts, or the core support bushings are incorrect.

how do i tell if my engine mounts are bad? or if my core supports are wrong?

joeydurango · 05-23-2024, 06:58 PM

Yes, as has been said, the K truck engines sit back further than the C trucks. I believe this is to keep the oilpan from contacting the front axle/diff. My K10 has the stock engine location, deep shroud, aftermarket clutch fan that I installed, and a fan spacer that moves the fan into the proper space within the shroud.

Just a little more info for you, hope it helps!

joeydurango · 05-23-2024, 07:00 PM

Quote:

Originally Posted by vardenafil

how do i tell if my engine mounts are bad? or if my core supports are wrong?

It could also be that the shroud isn't installed properly at the bottom. Take a look, it's easy to check. Is it firmly seated to the bottom of the clips that hold it in place? If someone got frustrated and didn't install it properly, it could rotate the bottom back toward the engine, lifting the bottom of the shroud toward the fan.

vardenafil · 05-25-2024, 04:38 PM

somehow i missed the passengers radiator mount bushing is loose. I ordered new bushings to see if it will settle.

05-21-2024, 11:50 AM	#26
1970cstblazer All stock and staying that way Join Date: Jul 2003 Location: Elkland, PA Posts: 1,351	Re: overheating at idle You either have worn engine mounts, or the core support bushings are incorrect. __________________ 1970 K/5 Blazer CST 4WD, Bronze, 93k ACT. miles, 350, 4 speed, positraction, 16.5" x 8.25" wheel option, tilt, tach, vacuum, AM/FM, manual throttle...Dad ordered and purchased new 4/70. Currently frame off restoration in progress... 1972 Cheyenne Super 20 2WD, DK Blue/White, 90K ACT. miles, 402, TH400, 4.10 open, tilt, tach, vacuum, A/C, AM/FM, manual throttle.. A mostly original paint never rusted Texas survivor... 2017 Sierra 1500 SLT 4WD, Black, 41k miles, 5.3, 6L80E, 3.42 LS, 20" polished wheels, everything but moonroof and 6.2... 2019 Canyon SLT 4WD, White, 60k miles, 3.6, 8L45, 3.23 LS, 18" wheels

05-23-2024, 06:58 PM	#28
joeydurango Registered User Join Date: Dec 2013 Location: Durango, CO Posts: 825	Re: overheating at idle Yes, as has been said, the K truck engines sit back further than the C trucks. I believe this is to keep the oilpan from contacting the front axle/diff. My K10 has the stock engine location, deep shroud, aftermarket clutch fan that I installed, and a fan spacer that moves the fan into the proper space within the shroud. Just a little more info for you, hope it helps! __________________ 1972 K10 Cheyenne Super \| LWB, fleetside \| 350/350/205 \| KEEPER 1971 K10 Cheyenne \| SWB, fleetside \| LS Swap 5.3/4L60 \| SOLD 1976 Trans Am \| 400/4-spd \| SOLD 1976 Trans Am \| 455/4-spd \| TOTALED

05-25-2024, 04:38 PM	#30
vardenafil Registered User Join Date: Oct 2020 Location: ca Posts: 84	Re: overheating at idle somehow i missed the passengers radiator mount bushing is loose. I ordered new bushings to see if it will settle.



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