Question about 1994 Chevrolet S-10 Blazer

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Overheating my 94 cpi blazer is running hot has new water pump new radiator no thearmostat. cat. was checked and exhaughst has good flow what else could it be

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Did I read that right and it has no thermostat?

Running it without a thermostat will cause it to overheat.

The problem is there is nothing to slow down / restrict the coolant and let the radiator do it's job.

A very common misconception on how cooling systems work..


Posted on Jun 19, 2008

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Had A caprice once that had an earlier style water pump and was running backword

Posted on Aug 04, 2008

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U can also check fan cluch

Posted on Jul 19, 2008

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For 1 flsh the system 2 if serpitine check to see if the water pump is going the right direction 3 you need a thermostat.and run a hose to see if heater core is clogged

Posted on Jan 04, 2009

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My 94 Chevy caprice is overheating why?!


Some possible causes of the high coolant temperature...........

1. The radiator fans are not kicking in when the temp rises.

2. The water pump may be working but if the impeller blades have corroded badly the performance of the water pump will be very poor. (Some water pumps used by some manufacturers have plastic impeller blades and over time these blades will break apart).

3. The thermostat is stuck partly open and is retarding 100% coolant flow through the radiator. The thermostat needs to be fully open for maximum coolant flow from the engine to the radiator.

4. You have a partial blockage in the cooling system which is retarding coolant flow. This may be in the radiator or in the cooling passages in the engine.

5. Check if you have bubbles in the radiator. Wait for the engine to cool and start the engine. Take off the cap and wait for the thermostat to open and for the hot water to begin flowing through the top hose into the radiator. Then watch for any bubbles appearing in the coolant. If there are bubbles continuously it is an indication of a combustion leak into the cooling system and that will cause overheating until the problem is fixed. In that event have a leak down test carried out on each cylinder to confirm that the combustion is leaking into the cooling system..

Have the problem, whatever the cause, investigated and fixed. Allowing the engine to run hot will cause very expensive engine damage many times what it will cost you to fix the cooling issue you have now.

Dec 28, 2015 | Cars & Trucks

2 Answers

I have a 1994 ford Taurus that has new plugs new thermastat new water pump new coil wires but car is still overheating


does putting heater on hot prduce hot air.on full with fan on does it reduce temo?is ur radiator fan coming on? hard to give one answer.as dont know if its overheating in traffic or on the move?there could be air stuck in pipes slowing water flow.or a pipe/radiator blockage so coolant doesnt get to flow around engine so it gets hot.u could check radiator by touching see if hot or cold where pipes enter(prob switch off engine first) try bleeding system squeesing pipes to push air out

May 20, 2015 | 1994 Ford Taurus

3 Answers

My blazer runs good ideling but when gets hot there is no power


Cat. converter ?? Clutch disc if it is standar, I would check those first before changing parts.

Aug 08, 2014 | 2000 Chevrolet Blazer

2 Answers

2001 Blazer Replaced heater core now water pump is squealing and seems like low circulation


my 98 Blazer I had to replace radiator water pump heatercore and hoses. Had head gasket go. Once that happens air and dexcool corrode cooling system. Do you smell antifreeze? Are you loosing antifreeze? Check oil see if its another color not clear or black but i think light brown. Have you flushed out system?

Jan 31, 2013 | 2001 Chevrolet Blazer

1 Answer

94.lexus ls400- keeps pushing radiator coolant out of overflow,


Your radiator could be glogged and causing it to back up out of overflow,drain coolant,if still good,save and remove bottom hose from radiator get hose and insert in radiator and let run and see how flow is,if clooged,go to autozone and tell them what is happening and they will get you what you need to unglog .To check water pump,unscrew radiator cap and put over opening,crank engine,let it get at operating temperature,remove cap and check flow.Click on link to view radiator flush. http://www.autozone.com/autozone/accessories/Fluids-and-Chemicals/Radiator-Cleaner-and-Additive/_/N-262g?filterByKeyWord=radiator+flush&fromString=search

Oct 20, 2012 | 1994 Lexus LS 400

1 Answer

Engine overheating


check for water coolant circulation. either you might have a clogged radiator or faulty water pump. to check the radiator after you run the engine for a while switch it off and try to find an easy access to radiator vents and touch all surface to see whether is all ho or if is some,then you remove it and send it for cleaning. as regards water pump,take the thermostat out put water in and start the engine follow the water circulation when you rev.if it rotates the water pump is working if is steady and coming upwards to over flow then the water pump is faulty. Also the other possibility is the matrix to be clogged..

Aug 30, 2012 | 1996 Ford Taurus

1 Answer

Overheating problems for 1987 chevy K5 Blazer


Is it possible the replacement engine has a water pump that turns the opposite direction from the original ?
The thermostat has to be open to allow flow thru the radiator, have you tried running without a thermostat to check flow ?

Jul 24, 2012 | Chevrolet Blazer Cars & Trucks

2 Answers

Overheating after replacing radiator & thermostat in my 94 318I


check sensor
check actual temp with non-contact thermometer

Jul 01, 2009 | 1996 BMW 318

2 Answers

Water is not flowing in pipes


You need either a new thermostat or a new water pump.

Apr 13, 2009 | 1992 Honda Accord

1 Answer

1997 bmw z3 conv. 1.9 overheated, changed radiator, new thermostat, hoses car still overheating , fill radiator w/water but water does not seen to go through , released air pressure from radiator and...


hi jasso, I would recommend checking the water pump if you see no flow in the radiator. Make sure when you fill up the cooling system, that you fill it cold, and that the vent screw in the radiator is loose. fill system until fluid comes out the vent screw. tighten the screw, start the car and have someone run at 1500rpm and check for flow.also, make sure that you have your temp setting full hot and blower on middle speed so that you don't trap air in the heater core.

Apr 04, 2009 | 1997 BMW 328

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