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04 Civic EX Automatic Overheating
Worked a a friend's 2004 Civic EX 1.7L VTEC today. Car overheating /
no heat into passenger area / both cooling fans will come on only if AC is turned on. Main cooling fan not coming on. Changed T-stat with OEM Honda part and still temp gauge rises while car sits idling. Heater hoses into firewall one is cold other just barely warm. At first lower radiator hose was cool to touch then after car sat off not running the hose warmed up. Waterpump ? |
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#2
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04 Civic EX Automatic Overheating
On 10/01/2011 08:18 PM, ndccpf1 wrote:
> Worked a a friend's 2004 Civic EX 1.7L VTEC today. Car overheating / > no heat into passenger area / both cooling fans will come on only if > AC is turned on. Main cooling fan not coming on. check operation of the thermoswitch. they can and do fail. > Changed T-stat with > OEM Honda part the right one for this vehicle? oriented correctly? not saying you didn't but mistakes happen and have a big effect. > and still temp gauge rises while car sits idling. did you check the expansion bottle to see if there are bubbles when the motor's running? > Heater hoses into firewall one is cold other just barely warm. At > first lower radiator hose was cool to touch then after car sat off not > running the hose warmed up. Waterpump ? unlikely - pumps hardly ever fail in a way that stops them pumping. check the basics before guessing what the problem is: does it have sufficient coolant? look in the radiator, not just the expansion bottle. what is that coolant like? clear? cruddy? is it properly concentrated antifreeze or just water? are the drive belts present? in good condition? i'd fix the known problem first - the thermoswitch [it won't solve the hose temperature anomalies, but a working one needs to be present], then as part of the above, make sure it's not the head gasket. if the gasket is leaking and the coolant circuit is full of bubbles, you'll not get much heat transfer. -- nomina rutrum rutrum |
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04 Civic EX Automatic Overheating
On 10/02/2011 09:08 AM, Elmo P. Shagnasty wrote:
> In >, jim > > wrote: > >>> Changed T-stat with >>> OEM Honda part >> >> the right one for this vehicle? oriented correctly? not saying you >> didn't but mistakes happen and have a big effect. > > been there, done that. it's a particular problem on hondas because they use a bypass flow design, and the thermostat needs to be both present and working for routing to be correct. -- nomina rutrum rutrum |
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04 Civic EX Automatic Overheating
On Oct 2, 12:02*pm, jim beam > wrote:
> On 10/01/2011 08:18 PM, ndccpf1 wrote: > > > Worked a a friend's 2004 Civic EX 1.7L VTEC today. Car overheating / > > no heat into passenger area / both cooling fans will come on only if > > AC is turned on. Main cooling fan not coming on. > > check operation of the thermoswitch. *they can and do fail. Will have to check this one. It sticks out from the T-Stat housing correct ? > > > Changed T-stat with > > OEM Honda part > > the right one for this vehicle? *oriented correctly? *not saying you > didn't but mistakes happen and have a big effect. I gave the parts counter the VIN # of the car to help eliminate mistakes but will have to go back and cross reference the part number listed on the package. > > > and still temp gauge rises while car sits idling. > > did you check the expansion bottle to see if there are bubbles when the > motor's running? On this design no easy to look into the expansion tank down the neck. > > Heater hoses into firewall one is cold other just barely warm. At > > first lower radiator hose was cool to touch then after car sat off not > > running the hose warmed up. Waterpump ? > > unlikely - pumps hardly ever fail in a way that stops them pumping. I figured the pump would be OK just the seals could leak. However on VWs / Audis they had been using waterpumps with plastic vanes that had a high failure rate. Plastic are they for real ! > > check the basics before guessing what the problem is: > > does it have sufficient coolant? *look in the radiator, not just the > expansion bottle. > I made sure I added the correct pre-mix into the radiator and expansion tank ....in addition removing the air pockets. > what is that coolant like? *clear? *cruddy? *is it properly concentrated > antifreeze or just water? > Old mix did not appear so bad I replaced with Pre-mixed Prestone. > are the drive belts present? *in good condition? > If belts were missing AC compressor would not work (AC works but no heat), Powerr steering pump on top and see the belt there...and no Battyer light on (Alternator OK) > i'd fix the known problem first - the thermoswitch [it won't solve the > hose temperature anomalies, but a working one needs to be present], then > as part of the above, make sure it's not the head gasket. *if the gasket > is leaking and the coolant circuit is full of bubbles, you'll not get > much heat transfer. > > -- > nomina rutrum rutrum |
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04 Civic EX Automatic Overheating
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04 Civic EX Automatic Overheating
On Oct 2, 5:26*pm, Tegger > wrote:
> ndccpf1 > wrote in news:3e71b814-e467-493f-8afb- > : > > > Worked a a friend's 2004 Civic EX 1.7L VTEC today. Car overheating / > > no heat into passenger area / both cooling fans will come on only if > > AC is turned on. Main cooling fan not coming on. Changed T-stat with > > OEM Honda part and still temp gauge rises while car sits idling. > > Heater hoses into firewall one is cold other just barely warm. At > > first lower radiator hose was cool to touch then after car sat off not > > running the hose warmed up. Waterpump ? > > You are probably low on coolant, and thus no flow at idle. > > When the engine starts to overheat, does the temperature go back down if > you rev the engine to 2,500rpm and hold it there? > > -- > Tegger After draining for the T-stat replacement, I topped off with new pre- Mix and made sure the over flow bottle had it also. I also tried to work the air out (capt off running).. What condition changes at the extended 2,500 RPM ? |
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04 Civic EX Automatic Overheating
ndccpf1 > wrote in news:a1bd092b-b1af-48ab-a0ec-
: > What condition changes at the > extended 2,500 RPM ? > The water pump is able to kick even low amounts of fluid through the system. -- Tegger |
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04 Civic EX Automatic Overheating
On Oct 2, 9:28*pm, Tegger > wrote:
> ndccpf1 > wrote in news:a1bd092b-b1af-48ab-a0ec- > : > > > What condition changes at the > > extended 2,500 RPM ? > > The water pump is able to kick even low amounts of fluid through the > system. > > -- > Tegger -------------------------------------------------------------------------------- Had to work the air out of the system. Car now running great and STRONG heat in the cabin now. Thanks to everyone who replied. |
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