55 chevy series 1 overheating - The 1947 - Present Chevrolet & GMC Truck Message Board Network

Rodney E · 05-01-2016, 08:10 AM

Ok I put new water pump new thermostat and new cap and still now circulation no water is going through top or bottom hose. Oil looks good and dont think its a blown head. Cleaned the radiator seems clear any ideas

Coupeguy2001 · 05-02-2016, 11:37 PM

1. Does the lower hose collapse when the pump is running?
Could be that the inner spring has rotted away.could be starving the pump
2. Take the thermostat out of the engine, and see if water circulates. Chinese thermostats sometimes don't work
3. Check the radiator for heat. If the radiator gets hot, the water is circulating. Could be a faulty temp gauge.
4. Check the belt tightness. a loose belt will cause the pump to slow down and become inefficient.
5. use a candy thermometer or electronic thermometer.to determine your gauge is correct or not. If you have a hand held one, move it around the engine to find hot spots
6. Try flushing the block to see if there are any foreign debris that got stuck in the block/head.
7. Recheck the head outlet for any obstructions
8. use a light and mirror to determine the condition of the radiator.

Link X · 05-13-2016, 04:23 PM

Flush the block. Did you have a Rad shop clean the rad, they can boil it and take the tanks off and "rod" the core to clean any build up.

OrrieG · 05-13-2016, 06:36 PM

I think this is an old double post.

**mr48chev** · 05-14-2016, 01:47 PM

I didn't see another thread on the same subject.

Coupeguy 2001 hit on most of the regular overheating issues.

The only thing I would ask is what engine does the truck have in it? Stock six stock 8 or a later model engine?

On the coolant circulation, it won't circulate until the thermostat opens. Also some styles of thermostats don't let the air bleed out of the block and head real well and trap air.

OrrieG · 05-15-2016, 04:15 PM

Quote:

Originally Posted by mr48chev

On the coolant circulation, it won't circulate until the thermostat opens. Also some styles of thermostats don't let the air bleed out of the block and head real well and trap air.

small 1/8 hole drilled in the t-stat helps with that.

dsraven · 05-15-2016, 05:09 PM

coolant should circulate through the heater hoses at all times, if you have heater hoses. you can disconnect them from the heater and then use a short piece of clear beverage tubing to connect the two pieces, that way you can see if bubbles are moving through the system. the hoses should also get warm though, if you just start the engine and run it without disconnecting anything. if you don't have a heater you can also just install a couple of plumbing nipples into the threaded ports on the engine to accept heater hose for a flow test. what is the history on the rad, clean inside or was it blossomed around the ends of the rad tubes that can be seen through the rad cap? good flow through rad with garden hose running into top and lower hose off? what is the engine temp getting up to when running? is this an old engine that sat in a field for years and may have a mouse nest in the block somewhere?

05-01-2016, 08:10 AM	#1
Rodney E Registered User Join Date: Apr 2016 Location: Owensboro Ky. Posts: 5	55 chevy series 1 overheating Ok I put new water pump new thermostat and new cap and still now circulation no water is going through top or bottom hose. Oil looks good and dont think its a blown head. Cleaned the radiator seems clear any ideas

05-02-2016, 11:37 PM	#2
Coupeguy2001 Registered User Join Date: Aug 2011 Location: phoenix az Posts: 723	Re: 55 chevy series 1 overheating 1. Does the lower hose collapse when the pump is running? Could be that the inner spring has rotted away.could be starving the pump 2. Take the thermostat out of the engine, and see if water circulates. Chinese thermostats sometimes don't work 3. Check the radiator for heat. If the radiator gets hot, the water is circulating. Could be a faulty temp gauge. 4. Check the belt tightness. a loose belt will cause the pump to slow down and become inefficient. 5. use a candy thermometer or electronic thermometer.to determine your gauge is correct or not. If you have a hand held one, move it around the engine to find hot spots 6. Try flushing the block to see if there are any foreign debris that got stuck in the block/head. 7. Recheck the head outlet for any obstructions 8. use a light and mirror to determine the condition of the radiator. __________________ http://http://67-72chevytrucks.com/v...d.php?t=489721 Last edited by Coupeguy2001; 05-02-2016 at 11:43 PM.

05-13-2016, 04:23 PM	#3
Link X Registered User Join Date: May 2009 Location: Mendota,MN Posts: 6	Re: 55 chevy series 1 overheating Flush the block. Did you have a Rad shop clean the rad, they can boil it and take the tanks off and "rod" the core to clean any build up.

05-13-2016, 06:36 PM	#4
OrrieG Registered User Join Date: Jun 2006 Location: Idaho Posts: 8,800	Re: 55 chevy series 1 overheating I think this is an old double post. __________________ 1959 Chevy Short Fleetside w/ 74 4WD drive train (current project) OrrieG Build Thread 1964 Chevelle Malibu w/ 355-350TH (daily driver) Helpful AD and TF Manual Site Old Car Manual Project

05-14-2016, 01:47 PM	#5
mr48chev Registered User Join Date: Jul 2007 Location: Toppenish, WA Posts: 15,711	Re: 55 chevy series 1 overheating I didn't see another thread on the same subject. Coupeguy 2001 hit on most of the regular overheating issues. The only thing I would ask is what engine does the truck have in it? Stock six stock 8 or a later model engine? On the coolant circulation, it won't circulate until the thermostat opens. Also some styles of thermostats don't let the air bleed out of the block and head real well and trap air. __________________ Founding member of the too many projects, too little time and money club. My ongoing truck projects: 48 Chev 3100 that will run a 292 Six. 71 GMC 2500 that is getting a Cad 500 transplant. 77 C 30 dualie, 454, 4 speed with a 10 foot flatbed and hoist. It does the heavy work and hauls the projects around.

05-15-2016, 05:09 PM	#7
dsraven Registered User Join Date: Nov 2010 Location: calgary alberta Posts: 8,334	Re: 55 chevy series 1 overheating coolant should circulate through the heater hoses at all times, if you have heater hoses. you can disconnect them from the heater and then use a short piece of clear beverage tubing to connect the two pieces, that way you can see if bubbles are moving through the system. the hoses should also get warm though, if you just start the engine and run it without disconnecting anything. if you don't have a heater you can also just install a couple of plumbing nipples into the threaded ports on the engine to accept heater hose for a flow test. what is the history on the rad, clean inside or was it blossomed around the ends of the rad tubes that can be seen through the rad cap? good flow through rad with garden hose running into top and lower hose off? what is the engine temp getting up to when running? is this an old engine that sat in a field for years and may have a mouse nest in the block somewhere?



Register or Log In To remove these advertisements.

Register or Log In To remove these advertisements.