Vehicle & Technical > Discovery

overheating?

<< < (2/3) > >>

Range Rover Blues:
The pressure in the system stops the boiling, when you take the cap off the pressure goes and the water boils, that's why it's so dangerous to take the cap off a hot engine.
It does sound like an air lock but where it's from I don't know (assuming it's a deisel).  I would point out that on a V8 there is a special filler on top of the engine becuase of this problem, you need to fill it very fast through the little plug to force air out of the system.  I also bleed mine periodically from this plug, although no air seems to collect there anymore.

Mace:

--- Quote from: "Range Rover Blues" ---The pressure in the system stops the boiling, when you take the cap off the pressure goes and the water boils, that's why it's so dangerous to take the cap off a hot engine.
--- End quote ---


Thanks for that Andrew, I stand corrected :-)

Bobtail:
it does seem to have been an air lock as mace said had cam
belt done last week so may be down to that (they have to take off
water pump on 300tdi)
its been fine today only time will tell *fingers crossed*

thanks for the help will let you know if it does it again

jim

Range Rover Blues:
Did it get filled with anti freeze mix?

I ask because tap water does contain an amount of absorbed air or oxygen (not sure which but it's what fish breath) so air locks can occur in a system that's just been filled up, especially if the water got aerated as it was poured at any time.  The air/oxegen whatever slowly releases as the coolant is heated and would normaly just vent into the header or at the top of a hose.  This can cause an airlock which is why I used to bleed my coolant from the filler (see above).

If it doesn't do it again then problem solved (even if happens but not as badly).

Bobtail:
well its not fixed going to take it to doctors tomorrow

*fingers crossed* it will not be expensive :-({|=

Navigation

[0] Message Index

[#] Next page

[*] Previous page