Overheating Issues. Bp 91 Fuel

[peter t]

Hi I have just got home from a road trip to Bundaberg and back and all was fine untill I filled with BP91. Up untill I filled up all was good but then I started getting overheating probs. Flushed radiator and new coolant in Bundy and short trips around town were ok. Started home today and after about 1.5 hours car started overheating again. Got a new thermostat in Gympie and made it another 3/4 hour down the road. Let it cool down and took off again. Was fine at 80-90 but pushed along at 100-105 it started to overheat again. No air con running today. Car is not a Z but my daily 82 Celica. I cut the air/blower belt off to see if that was the prob but didn't fix??

[gilltech]

Timing not suited to low grade fuel?

Swap to 96 & see...

Edited November 12, 2016 by gilltech

[peter t]

Timing not suited to low grade fuel?

Swap to 96 & see...

That was one suggestion by a passing motorist who stopped to see if I was ok. He even had a empty car trailer and offered me a lift no charge. Top Bloke.

[peter t]

Well that didn't work. The thing goes good for about a hour or so then decides to heat up with the air con on. Picked up an electric fan today and am fitting it so we will see if that works. Old cars just love them.

[CBR Jeff]

Peter is the cooling system holding pressure?

Do you have a coolant catch tank?

 

Jeff

[Mark B]

In My experience it will be the radiator, will only cool for so long then eventually the temp builds up and you have to wait for it to cool down. I would take the radiator out and have it cleaned professionally.   Bet you will find it is 50% blocked  MB

[AndBir]

I agree with Mark B, had a similar issue with an old car, went fine on flat roads bit as soon as you put extra load on it by going up a hill the temperature rose very quickly. Turned out the radiator looked OK on the outside but internally was stuffed.

[PB260Z]

I agree with Mark B, had a similar issue with an old car, went fine on flat roads bit as soon as you put extra load on it by going up a hill the temperature rose very quickly. Turned out the radiator looked OK on the outside but internally was stuffed.

Plus one on this.

 

My old Chev was always a worry in traffic, until I got the radiator completely re done.

What an amazing difference a quality radiator core makes. Well worth the $$

 

Cheers

Edited November 16, 2016 by PB260Z

[gilltech]

TBH & with the best will in the world DIY back-flushing of a radiator can only achieve so much.

I agree go with a fresh re-core plus a new pressure cap, & flush the motor itself out as best you can including the heater circuitry. Worked for my Zed way back when, & both Mustangs.

[peter t]

Thanks all, Might as well bite the bullet and get a new radiator. not that expensive on flea bay. Have a catch tank and also have invested in new cap. Takes a lot o fuel to get it to heat up so will get new radiator and pump as well.