So far I have replaced the engine temp sensor,thermostat, checked hoses and radiator replaced surge tank,and verified cooling fans are coming on, replaced waterpump and block tested the engine for combustion gasses. The vehicle runs ok at idle but overheats while driving, return to an idle and it will cool off again. Any suggestions?
My husband did everything that everyone else did that had this overheating problem. It was so weird that my engine cooled at a light and heated up going down the road. I have a north star 4.6 engine and this is natorious for happening. my check engine light also came on and so I had a diagnostics done which told me my #1 injector wasn't firing , car ran like **** as well. After putting in a new water pump and plugs,ect. and realized injector was good a friend told him we could have a blown head gasket. So just to see if this was the problem I went to buy a bottle of glassbeads and the auto parts guy told us to purchase a bottle of BARS STOP LEAK BLOCK SEALER NOT RADIATOR BUT BLOCK SEALER $31.99 . He followed the directions and we waited 24 hrs. before driving it. What ever the problem was has stopped my car runs like brand new and I am loving it again. no over heating no injector problem, runs great.......I hope this helps. I know its probly a temperary fix but its a fix and now we know what the problem was. SASSY
That sure sounds like a headgasket failure even if the engine recovers at an idle.
It seems you have done the likely suspects already.
If you haven't done it, check coolant overflow tank for exhaust fumes and discolored or oily coolant and engine oil for any cream-colored effect.
Neither of these missing means the headgasket is good but they are sure clues if you see either fouled.
You could also start cold, leave the radiator cap off (if you still have one) and watch for bubbles as the coolant starts to circulate.
If this problem has been coming on gradually, your radiator may be limed too far closed especially if anyone has used tap water in it for years.
If you can reach it, check the radiator to see if the temperature is roughly the same from top to bottom; that will tell you whether the coolant is passing through all of it. You wouldn't have to wait for it to get scorching hot for this.
Pellets. read owners manual
I have replaced radiator,thermostat,water pump,fans and fan relays.does fine sitting or even at low speeds until get 55 or above then overheats.1 thing i noticed is my fans are blowing air into the radiator from ingine bay to outside grille so when get to high speeds air going in through grille to the ingine bay is fighting the fans and not cooling the radiator and overheats until i slow down or stop.atleast what i have found so far with my 99 deville.still trying to find out how to solve the problem
Call 718-316-5935-----your car will be fix
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I block tested the engine cooling system for a head gasket/crack etc. I comes up negative. There is no water in the oil or coming out the exhaust. I flow tested the radiator and it is good also.
car will over heat when drove in the hwy
The pellets you speak of are an inhibitor to keep the aluminum form deteriorating from electolisis, and also a stop leak. I did finally fix the problem, these engines run close to boiling temperatures so the system has to hold presure. I found a couple of small leaks from hoses that had the factory clamps on them. After presurinzing the system and repairing all of the small leaks the overheating has stopped. Thanks for the feedback.
i have a 2001 dts. i changed the thermetat, water pump, and radiator. the car can idle for 2 hours without over heating. but once driven it over heats about 10-15 minutes whille driving. i have no leaks, no engine knocking.
Overheats after about 15min...
that smoke comes out of the hood
changed gasket, and thermostat....
if you have an idea on what it is let me know
thx
water is dripping from tailpipes (more than usual) and over heats
Engine is losing coolant> I can drive about 25 miles before the engine begins to overheat I then will need to put in a little less than a quart of coolant. If it is a headgasket. What is the best, most affordable and efficient way to resolve the leak problem. Tanks for the assistance.
call 1-718-316-5935----i ask a few questions and the problem is solve --garanteed
My 1999 Cadillac deville was overheating. I replaced the thermostat and the waterpump and its still overheating. What is my next solution?
On my 1999 cadillac deville the waterpump and thermostat was replaced, but there was coolant mix in with the engine oil. What can i do to get this resolved?
THE CHECK COOLIANT KEEP COMING UP I CHANGE THE WATERPUMP AND THERSTAT AND IT NT OVER HEATING BUT THE RADATOR HOSE FEEL TIGHT
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