Mechanics

EX OVERHEATING

1998 Honda Civic

My friends Civic is overheating real quick. He has replaced with new parts the water pump, radiator, thermostat, coolant temperature sensor, and one other sending unit or sensor which I dont know exactly what its for but it is related to cooling system somehow. First, shouldnt the new radiator if its started with the cap off not push coolant back out through the cap? Second, after it starts the coolant just sits there and its not cirulating. So is it safe to say that its either the thermostat not opening or is it just a bad radiator or something totally different? Coolant doesnt seem to be reaching the engine block.I wouldnt think the thermostat would cause it to push coolant back the other way. Could anyone please help? Thanks

I just thought of something, are some radiators sold with a plug/cap in the lower hose end? Just a thought cause my friend isnt the sharpest pencil in the drawer at times. Lol
Avatar
MoneyCount
October 9, 2012.




So is the radiator fan coming on?Also do both the upper and lower radiator hoses getting really hot?


Saturntech9
Oct 9, 2012.
Actually the fan stays on when the key is turned on plus the upper hose gets a little warm but the lower hose is really cold if you asked me. Not warm at all.


Tiny
MoneyCount
Oct 9, 2012.
Does the vehicle use a fan that comes on intermittenly?


Tiny
MoneyCount
Oct 9, 2012.
MAYBE THERE IS AIR IN THE SYSTEM

HERE'S THE PROCEDURE ACCORDING TO MITCHELL I IN THE PIC BELOW

I WAS ONCE AT A SHOP WHERE SOME FELLER HAD INSTANT OVERHEATING---NO ONE COULD FIGURE IT OUT---THEY TRIED MANY THINGS. NO ONE COULD FIGURE IT OUT. EXCEPT FOR THE "SHARP PENCIL" IN THE SHOP (NOT ME). SOMEHOW, THE OWNER FELLER MIS-ROUTED HIS SERPENTINE BELT (AND SOMEHOW IT FIT). WITH THIS CONFIGURATION, THE WATER PUMP TURNED BACKWARDS. THE IMPELLER WOULD NOT MOVE WATER!

THIS WAS YEARS AGO, I HAVE NO IDEA WHAT THE CAR WAS

KEEP US POSTED

THE MEDIC


Tiny
CJ MEDEVAC
Oct 9, 2012.
Hmmmmm, Now thats a thought because he does have a belt squeal. Now would this cause coolant to erupt out of radiator when the cap is off while starting then quit when started?


Tiny
MoneyCount
Oct 9, 2012.
MAYBE A BLOWN HEAD GASKET?

COMPRESSION SORTA SLOWLY BEING INJECTED INTO THE WATER JACKET WHILE CRANKING?

COMPRESSION MOSTLY GOING OUT THE EXHAUST WHEN IT'S RUNNING?

I'M THROWIN' STUFF

CHECK COMPRESSION

KEEP ON TALKIN'. OTHERS TEND TO JUMP IN AND ASSIST

THE MEDIC


Tiny
CJ MEDEVAC
Oct 9, 2012.
DID THE WATER PUMP TURN FREELY. WHEN IT WAS INSTALLED?

I DON'T KNOW WHAT YOU HAVE. PLASTIC OR METAL

THE PIC AT THE BOTTOM WAS OF ONE THAT FAILED OVER TIME (STILL CRAPPY)

DOES IT SPIN FREELY NOW, IF YOU REMOVE THE BELT?

IF FOR SOME REASON YOURS IS PLASTIC AND HAS FAILED (MAYBE IN A BIND DURING INSTALLATION)

TO AVOID REMOVING THE PUMP

YOU MIGHT TRY TAKING THE LOWER HOSE OFF OF THE PUMP---SHOVE A PIECE OF CLOTHES HANGER IN THE HOLE (TO "STOP" A "GOOD" IMPELLER) THEN TURN THE PULLEY BY HAND TO SEE IF IT INDEED. SEE IF THE IMPELLER WANTS TO TURN, AND NOT FREEWHEEL WITH NO RESISTANCE

THE MEDIC
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Tiny
CJ MEDEVAC
Oct 9, 2012.
If both hoses are not getting really hot when the engine gets hot you have coolant not circulating.I wouldnt do a compression I would do a chemical block tester test which they rent at auto zone.


Saturntech9
Oct 10, 2012.

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