Vehicle & Technical > Discovery

rapid overheating

<< < (5/7) > >>

jkseries:
Thanks for that.

Did you have the same problem with your heater?

There are all these symptoms and I just can't tell what they're pointing me towards.

I guess it's going to need all stripping out and flushing through.  I'm a little concerned about this hissing now though.

J

crazymac:
Your rad should be an even temp all over, if it is cooler at the bottom then that suggests a blockage or an airlock.

If your P gasket was leaking then you would see a little tell tale of a mark below where the water is running down the block, usually this is the bottom behind the pulley.

When you refilled it, did you take the top bung on the rad out and fill there 1st then fill through the expansion tank? Once you have done that then run the engine with the bung out and you should see the water moving through.

Also the small rad in the heater is integral to the system, the water flowing through there is what provides the heat! Again because you aren't getting heat inside suggests an airlock or blockage.

Have you tried to flush water through the system? Take the top hose off and stick the hose in the rad, then with the expansion tank cap off see if the water is being forced through.

jkseries:
I have flushed the system. Before I did anything else it seemed like the easiest thing to do.

Yep topped up the rad. Then expansion the thermostat housing. Just been back out to it to top it up ready for the morning so gave the heater hoses a squeeze while i was there.

I know that the little rad is integral to the heating but wanted to know if it was integral also to cooling.

If the rad isn't a constant temperature could it be blocked?

Also from an earlier post i checked the thin hose from the top of the thermostat housing to the bottom of the expansion bottle. It is clear.

Thanks for all the help.

J

Disco_Dennis:
I had these exact same symptoms recently on a friends 300tdi,  :roll:

We changed pump, hoses, gaskets and it turned out to be a blocked rad - even flushing/blowing it through didn't clear it  :roll:

You need to drain the rad, and take it out - if it's really heavy replace it, if not try flushing or blowing it out with a air line (not too much pressure, though!)  :shock:

Changed the rad and all was perfect.

I would get the gas sniffer on it, too it might already have done the gasket - although I hope not  [-o<

If you don't sort it out, it WILL blow the head gasket on the 300. I've seen it soooo many times now.  Cooling is their achilles heel.

trecfive:
If you think the rad is blocked, when you remove it fill it with cheap cola, and leave it overnight,the crap will get dissolved by the cola and float on the top by the hose mounts.I kid you not, i didn't believe it till i tried.

Navigation

[0] Message Index

[#] Next page

[*] Previous page