HOT!!! I'm thinking airlock?

[Sylux]

ps. The pressure is staying even when it cools as there is no coolant drawn back from the expansion tank.

[Sylux]

pps. I'm going to remove the rear heaters from the system.

I'll cut at the engine bay junction, pop a bolt in and jubilee clip them. Sound like the best way? Or U bend the rubber hose :/

[BUSHWHACKER]

ps. The pressure is staying even when it cools as there is no coolant drawn back from the expansion tank.

Because the rad cap isn't sealing properly creating positive pressure in the rad instead of negative pressure to draw the coolant from the expansion tank.

Or, you have another leak somewhere in the cooling system.

[BUSHWHACKER]

pps. I'm going to remove the rear heaters from the system.

I'll cut at the engine bay junction, pop a bolt in and jubilee clip them. Sound like the best way? Or U bend the rubber hose :/

Just link the two take-off pipes with a section of hose i.e. whete the rear heater pipes tee off from the main coolant pipes.

[Sylux]

Because the rad cap isn't sealing properly creating positive pressure in the rad instead of negative pressure to draw the coolant from the expansion tank.

Or, you have another leak somewhere in the cooling system.

For both caps (inc the new one) do this...it's weird? Maybe the rad is wrong at the cap area :/

Just link the two take-off pipes with a section of hose i.e. where the rear heater pipes tee off from the main coolant pipes.

Yeh, after some thought (and some other threads) I was planning on just this. Will be able to use what's there

[BUSHWHACKER]

What's the pressure rating of the cap/s, 0.9 BAR?

[Sylux]

Yeh...it's the one from RT :/

Pressure holds in the system all through the night, too.

[BUSHWHACKER]

I know it's stifiling out there, but have you checked that your heaters get hot?

[Sylux]

Yes, I think! They were used to expel heat the time it went to red, last week.

Exhaust should be here in a few mins and I'll do the blanking of the rear heaters. See if anything happens.

Could this just be a daft block, somewhere? Expansion pipe seems clear. It's just not going back in.

[MadScott]

That's what she said...

Don't have a hose that's soft, buckling and sealing under cooling/contacting conditions, ay...?

Fargin stumper this, bad head don't stay hard all night...

[Sylux]

Fargin stumper this, bad head don't stay hard all night...

Hope so...good to hear anyways.

I'll check all hoses again.

I've fitted the new flexi (canny vibration so see why it's flexi) and took her for a spin. No more loud turbo and runs smooth as. So that's that one nailed.

Surfaces didn't mate perfectly, like. But the gaskets should do their job.

Now I just need to keep an eye on the expansion/no return issue. Can't have two knacked caps, surely.

[Sylux]

Deleted the rear heaters from the system. Front and back capped with U bend hose. Back's done just to stop crap getting in.

One less thing to worry about and when I get some cash I'll reinstall using better piping.

[BUSHWHACKER]

Deleted the rear heaters from the system. Front and back capped with U bend hose. Back's done just to stop crap getting in.

One less thing to worry about and when I get some cash I'll reinstall using better piping.

You could always replace the steel piping with 8mm coolant hose, cheaper and easier.

http://www.ebay.co.uk/itm/REINFORCED...item19caddabaa

http://www.ebay.co.uk/itm/EPDM-Rubbe...item3f24d09505

http://www.ebay.co.uk/itm/No-8-4-2mm...item53fc277e33

[Sylux]

Cheers, Vince.

Was totally going to use hose. Should have been hose from the factory.

Anywho...it's a long way off. Like the idea that they've been deleted, for now

[Sylux]

The expansion tank is still filling up and not going back!!! It's ####ing me off!

I took it on another big run yesterday. Horsed it around and no overheating. It's done some canny miles and no overheating issues since the one time it went too high.

Left it till this morning and the expansion tank hasn't gone back in the system!

I've burped it loads so I'm not sure if there could be an airlock.

It has a brand new cap.

I've deleted the rear heaters.

Stuck :/

How does the coolant go back in the system from the expansion tank? I understand how it gets in (pressure pushes the spring on the cap, allowing coolant out)...but how does it get back? If the cap spring closes there's no way back in :/

Help me out, guys