Thread: 80series heater issues

Had a problem with it in the past, bit of research and I disconnected the heater core and flushed it out. Tried that trick and it didn't work so drained everything out of the radiator and tried again, still no luck....

Just had the old girl in at the doctors for a bit of other work, they looked and discovered heater "tap" had a bit of plastic flogged out, replaced with straight bit of hose as a trail (new tap is on the way) but still not vast amounts of heat over a 30Min drive...

Any ideas folks? Discovered that whilst my one doesn't have heated seats the rear heater is "water" powered, always thought it was electric! (that works fine)

If you are getting some heat from it I would suggest that it is partly blocked again.

Originally Posted by ROKTOY

If you are getting some heat from it I would suggest that it is partly blocked again.

Hmmm will have another crack at it. Would be nice to have it when it spends it (currently) lives on a ski road

Is it the push button type electronic control or is there levers you physically move connected to cables that open taps and control flaps?
If its electronic I would put money on the electronic bit being sus as they are well known for shitting out.

Electric.... But no central locking (they are bloody wife when you need to reach the other side to unlock)

Gave the heater core another flush, see what happens tomorrow. Hopefully things have sorted out

What temp is the engine running on the gauge, the thermostat my be stuck open? They usually stick closed but just a thought. Check the heater pipes on the engine as they can block up too.

Not an airlock?

I had real problems with a surf years ago that airlocked after a coolant change

Originally Posted by SiB

Not an airlock?

I had real problems with a surf years ago that airlocked after a coolant change

It is possible, cooling system has been opened up quite a few times now, would have expected the under seat heater not to work if an airlock though.... @2post temp gauge is showing where it normally is and not smelling overly warm. Though is could be thermostat, garage mentioned it when I explained the problem and nothing when I picked it up

Next thing I would check is if both heater pipes (at the bulkhead end) are hot when it's up to temp, if they are then I would assume good water flow though your heater. Then it may be a flat inside your heater box, as veitnamcam mentioned. Keep at it you'll get there!

Years drove my grandfathers HQ holden back from Dunedin to Queenstown.
He raved about his heater and and how good the heat was.
I filled the radiator up and that cooled things markedly.

Years drove my grandfathers HQ holden back from Dunedin to Queenstown.
He raved about his heater and and how good the heat was.
I filled the radiator up and that cooled things markedly.
Comment to check your thermostat could be a go.
It is winter and things will run cool this time of the year.
I rode my bike across the Desert Road last weekend both ways and the water temp that normally runs at 69c was cycling between 61-65c as it warmed and cooled.

Then it may be a flat inside your heater box.

I meant flap inside your heater box.

A few years back my old 70 series was parked in the shed for a while while I was away and when I got back the heater wasn't functioning at all well. A rat had crawled in through the heater air intake and build a nest inside the ducting blocking it up. It was a prick of a job pulling the whole heater system apart and removing the straw and rat shit ...

they fixed that in the 80 series they all came with rats pre installed and cats pre installed to catch them

Apparently they have an arsehole too but can never see it when I drive it