Thread: TD5 Top Hose pressure - How hard is too hard?

how did you bleed it up?

have you replaced the coolant tank cap ever, maybe leaking or not relieving pressure when needed.

New coolant cap 2 months ago.

Bled with the tank lifted up, bleed screw running clear, rev the motor, heater on high, take it for a run, check level. As I say, it never loses anything, which I thought it would do with a pressurising issue....

Check the hose when it's cold ... should be soft. Drive until it's up to temperature, and with the engine still running, check the hose again ... should be quite firm/solid ... drive home and park. Stop the engine. Check the hose. It should be as firm as it was at the previous check.

Over the next 6 hours or so, keep checking the hose. It should progressivley get softer and softer as the water temperature drops until the whole sheebang is as cold as the first check, at which point the hose should be as soft as it was for the first check.

If it's all as outlined above, I believe you have no issue (esp' if there is no coolant loss). A given volume of water will expand as the temperature rises, which is where the increased pressure in your hoses come from.

Thanks Fluids, that's how it appears to be when I've checked it all before, soft when cold, firm when warm and running and progressively softer when not running...

Ah well, guess I'll leave it alone and just drive the thing....

Originally Posted by Marmoset

Thanks Fluids, that's how it appears to be when I've checked it all before, soft when cold, firm when warm and running and progressively softer when not running...

...

............that is the hose you are talking about.....????? Right??????

... and keep an eye on it !

If it's not using/loosing coolant I guess all's good ?

If its gurgling its not bled fully...

Park on a steep angle, nose up... Lift the coolant bottle free and up and repeat bleeding process.