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xr8 over heating problem 

 

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 Post subject: xr8 over heating problem
Posted: Tue Oct 06, 2009 7:56 pm 
Parts Gopher
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Ride: eb xr8 falcon/1966 xr fairmont

Location: Elizabeth Grove
SA, Australia

I have an eb series 1 xr8 and i have a major heating problem, i have replaced the top hose, water pump, thermostat, thermostat housing, temp sender, temp gauge and air temp sensor, but still gets hot when you give her the boot or when climbing hills, when descending down hills she cools off the only thing i can put it down to is the trans is making her overheat, i have fushed and flushed the system and i am using anti freeze and anti boil coolant, have put el thermos on it and it still hasn't changed. does any 1 have any ideas
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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 8:34 pm 
Getting Side Ways
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Ride: ED Fairmont Ghia & EF XR8

Location: Melbourne
VIC, Australia

possibly a blocked radiator or the impeller vanes on the water pump are badly corroded reducing water flow through the block semi-functional thermostat (not opening fully) blocked heater core again reducing flow around the block

how bad was the coolent, was it dirty or was it really rusty orange s**t

 

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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 8:52 pm 
Parts Gopher
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Age: 39

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Ride: eb xr8 falcon/1966 xr fairmont

Location: Elizabeth Grove
SA, Australia

all parts replaced with brand spanky new parts, new pump only had it off like a week ago and the impeller is new as and when flushing the water is good no rust scale or corrosion. Has a $40 high flow thermostat and a new housing new hoses etc. I was told to get a desert cooler radiator but i figure that if it was fitted with the radiator thats in it then it should be fine with that 1. Was thinking of removing the air con radiator as the pump is buggerd and i can't use the air con due to hey fever and stuff but i am guessing that probably wont be any better, have washed the radiator fins of bugs and creepys 2 still no difference
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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 9:01 pm 
Getting Side Ways
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Location: Melbourne
VIC, Australia

my guess would be the radiator. how old is it?
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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 9:03 pm 
Parts Gopher
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Age: 39

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Ride: eb xr8 falcon/1966 xr fairmont

Location: Elizabeth Grove
SA, Australia

The radiator is original i am guessing any way which would be 1991 but can't be sure
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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 9:06 pm 
Parts Gopher
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Age: 39

Posts: 94

Joined: 27th Sep 2009

Ride: eb xr8 falcon/1966 xr fairmont

Location: Elizabeth Grove
SA, Australia

have also noticed that it cools down when i put the heater on and goes back up when the heater is off, the radiator looks really good has a good flow with out the hoses connected as well
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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 10:57 pm 
Getting Side Ways
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Ride: EL F100 CAPRI XR EF

Power: 234 rwkw

Location: brighton
SA, Australia

i would have the radiator flushed professionally, they can look good on the outside but when u pull a end tank off they can be blocked 1/3, 1/2, or even more up the core, inside the tubes.
and the water u are flushing though could just be going thru the top half of the radiator

having replaced everything but the radiator u dont have much left to try.
a flush will cost u around $75 and u would know that it was that or not

what else is left to try ...blocked head gasket coolant holes?
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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 11:20 pm 
Getting Side Ways
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Ride: ED Fairmont Ghia & EF XR8

Location: Melbourne
VIC, Australia

well yeh,if you have replaced everything bar the radiator then it almost sae to say that's you problem. One bit of advice is spend t extra $$$ and get a decent oversized raditor.

I stinged out and bought a repco special. temps a fine when the weather is below approx 25deg but above that sitting in traffic and the needle just rises. It doesn't overheat but it gets a little to hot for my liking. :s

 

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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 11:25 pm 
Getting Side Ways
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Ride: EL F100 CAPRI XR EF

Power: 234 rwkw

Location: brighton
SA, Australia

have u replaced the bottom hose, do they use a spring inside them still? to stop the sides sucking together, therefore reducing the flow?
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 Post subject: Re: xr8 over heating problem
Posted: Tue Oct 06, 2009 11:55 pm 
Oompa Loompa
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Almost certainly the radiator, they tend to get full of crap with age. If it's the original I wouldn't bother getting it cleaned/rodded out, the plastic tanks are probably brittle and ready to break. New 32mm thick alluminium core radiators can be had for $150 delivered on ebay.
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 Post subject: Re: xr8 over heating problem
Posted: Wed Oct 07, 2009 9:14 pm 
Tyre Shredder
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Ride: ED GHIA V8

Location: ford town
NSW, Australia

1966 Xr Falcon wrote:
I have an eb series 1 xr8 and i have a major heating problem, i have replaced the top hose, water pump, thermostat, thermostat housing, temp sender, temp gauge and air temp sensor, but still gets hot when you give her the boot or when climbing hills, when descending down hills she cools off the only thing i can put it down to is the trans is making her overheat, i have fushed and flushed the system and i am using anti freeze and anti boil coolant, have put el thermos on it and it still hasn't changed. does any 1 have any ideas



Exact same problem, I even had my radiator flushed and cleaned the previous year by a radiator shop, but my mechanic re-filled it again with cheap a** coolent when he did the water pump 6 months later and the coolent turned to little particles (look like rocks and sand) and blocked about 7 cms of the bottom tank.

100% your radiator needs a proper clean.

 

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 Post subject: Re: xr8 over heating problem
Posted: Thu Oct 08, 2009 7:42 am 
Getting Side Ways
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Ride: Lots, all Fords

Location: Hamilton
New Zealand

You describe a classic blocked radiator set of symptoms - overheats going up hill, cools going down, original 18 year old radiator, surrounding parts recently replaced.

The tubes in the original radiators are very narrow and fill with crap. I have a half blocked one on my test bed. With the engine up to temp you can hold your hand on the bottom 1/3 of the cooling fins. They are maybe 35°C max.

Buy a new radiator, heavy duty preferably.

 

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 Post subject: Re: xr8 over heating problem
Posted: Thu Oct 08, 2009 11:05 am 
Parts Gopher
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Age: 39

Posts: 94

Joined: 27th Sep 2009

Ride: eb xr8 falcon/1966 xr fairmont

Location: Elizabeth Grove
SA, Australia

Hey cheers guys for the help and i will let every one know what happens when i replace the radiator
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 Post subject: Re: xr8 over heating problem
Posted: Sun Oct 11, 2009 10:13 pm 
Parts Gopher
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Location: sydney
NSW, Australia

clutch fan sounds like its worn out
test the fan when the car is hot and it should be hard to turn and easier to turn when dead cold
i had this prob with my old eb1 when i put the a/c on and the new clutch hub fixed it. but get the radiator cleaned and checked also as mine split the next week.
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