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waterpump fan clutch and thermostat now overheating #5331843 01/25/20 01:43 PM
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HyundaiAbuser Offline OP
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So i recently replaced the water pump, fan clutch and thermostat in my mazda b4000 due to a leaking water pump. After bleeding i let it idle for about 20 minutes with no problems at all but once driving around my neighborhood it slowly climbed to the hot whereas this has never happened before. I used an aftermarket thermostat in this case where there was a motorcraft one before which is my first instinct. Secondly i am wondering if the rtv i used on for gaskets could be clogging it up that bad? What do you guys think?


03 Hyundai Tiburon:
PP High Mileage 5w30
Amsoil MTG
94 Mazda B4000
Supertech 10w40 High Mileage
Valvoline Dex/Merc
Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331845 01/25/20 01:47 PM
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CT8 Online Content
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Air pocket ? Did you check the fluid?


2015 F150 2.7
2018 F350 6.2
Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331852 01/25/20 01:55 PM
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slacktide_bitog Offline
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Maybe it's due to air in the coolant. If you don't have one, get the Lisle coolant funnel. It makes bleeding the coolant much easier smile

Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331856 01/25/20 02:00 PM
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Nick1994 Offline
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Probably air in the coolant. But just because a part is new doesn’t mean it’s any good. Aftermarket fan clutches often times suck, it might take a few tries to get a good one.

Take it for a drive, pop the hood, and shut off the engine and see if the fan keeps spinning or if it stops within a second or so.


2015 Hyundai Genesis 5.0L 58k Mobil 1 5w30 & Wix
2000 Toyota Camry 2.2L 238k Mobil Super HM 10w40 & Fram Ultra
1996 Jeep Cherokee 4.0L 150k Mobil 1 HM 10w40 & Fram Ultra
Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331865 01/25/20 02:09 PM
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Chris142 Online Content
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Recheck the level after it cools. If it's low fill and drive again. Did you put the stat in the correct direction? A little bit of rtv won' t plug anything up.

Last edited by Chris142; 01/25/20 02:10 PM.

02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
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Z400 castrol T 10w40
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Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331881 01/25/20 02:29 PM
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HyundaiAbuser Offline OP
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Update, after cooling i went back out and checked the coolant level and holy cow about a 1/2 gallon low. Total rookie mistake I just did the water pump on my hyundai and totally forgot about this. After topping off i drove around a bit and now the gauge stays between 45-55% in its given range whereas it used to sit at 25 then 55 then 70 and back to about 40 at random. I'm letting it cool off again then going to check and repeat. Thanks for the quick responses guys.


03 Hyundai Tiburon:
PP High Mileage 5w30
Amsoil MTG
94 Mazda B4000
Supertech 10w40 High Mileage
Valvoline Dex/Merc
Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331883 01/25/20 02:29 PM
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HyundaiAbuser Offline OP
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On the flip side i have lost heat in the truck so i am going to flush the heater core.


03 Hyundai Tiburon:
PP High Mileage 5w30
Amsoil MTG
94 Mazda B4000
Supertech 10w40 High Mileage
Valvoline Dex/Merc
Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331886 01/25/20 02:33 PM
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mk378 Online Content
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The heater can't work when the coolant is not full. Heater not working is often the first symptom it isn't full.

Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331895 01/25/20 02:47 PM
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ragtoplvr Online Content
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or first symptom that a head gasket is failing.

Rod

Re: waterpump fan clutch and thermostat now overheating [Re: HyundaiAbuser] #5331917 01/25/20 03:02 PM
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Delta Offline
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Originally Posted by HyundaiAbuser
On the flip side i have lost heat in the truck so i am going to flush the heater core.


Air bubble.


'17 VW GTI 2.0T - 6MT - 20K - Edge 0w40
'15 Camry SE - 2.5 - 26K - PP 0w20
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