Rad air lock

[The Electrician]

Right then, someone will know how to sort this.....

On my rad (plug at top of rad is stuck in place, so can't get that out) the bottom hose is hot, expasion tank, water pump, heater blows warm air (not hot, but then again, it is a disco).

Top hose and rad is cold and the water is boiling hot in expansion tank..............

..........Can i assume it is an air lock (pump works fine)

If it is a ir lock, how do i sort it out?


Cheers guys
Gary

[disco2 td5]

you could try takeing the top hose off the radiator and blead it that way

[crazymac]

Have you exhausted all avenues to get the top plug out? Cos you really need to work at this! Makes life so much easier.

Once out replace it with a metal one from a plumming suppliers or Difflock!

[The Electrician]

The plug in the Rad is a Brass one and the butcher that tried to get it out before just knackered it, it is all chewed up and if I bang it about, i reakon the already dented rad (around the plug) will just split and thren it will cost me a new rad, which I could really do without.

[crazymac]

In that case, take the expansion tank cap off and run the engine while pumping the bottom hose, have a supply of water handy to top up the tank as required.

[The Electrician]

I'll give that a go in the morning.....thanks

[mattyme]

you may also want to try taking the expansion tank lid off and pump the bottom hose as was said earlier, but, do it on the steepest hill facing uphill that you can find. it will help any air that is locked in the system come to the top and hopefully end up farting out of the expansion tank!!

another answer is to remove the pipes that go thru the bulkhead to feed the heater matrix and stick a hosepipe onto one of the pipes to flush out the matrix. if the cores are blocked with silt and rust deposits it wont let the hot water thru to send heat into the cabin. once this is done bleed the system as described earlier tho. i did mine and loads of crap came out and the cabin get much hotter now.

another reason for the cabin not gettin very hot is that your viscous fan coupling is not working properly. ive just changed mine as it was almost solid (i think from all the mud and stuff getting into it over time or it was just tired). with the engine cold, it should spin freely when you turn the engine off and only engage and spin under drive from the engine when it is warm. if it spins all the time at the same speed as the engine it is over cooling.

hope this helps.