Good morning,

I have a 2004 3.0ltr V6 petrol S Type. On a journey home the top radiator hose blew off . And lost a lot of coolant . Lucky for me it did it on the main road just before my house then I pulled into my drive very quickly and shut it off. The Temp didn't go up from half way. So I let it cool and bleed the system putting orange coolant in it. Ive run it up to temperature a few times and the heater works well. (The clip on the top hose didn't look very good so I fitted an old style jubilee clip).   All the hoses get hot and the coolant level seems to be staying the same . But when squeezing the top hose it seems rather firm.  Can any one advise me at what the coolant pressure is on these engines as I am able to put a gauge on it , I believe the caps blow off at 14.5 PSI. I don't want to run it on a long journey to have the same happen and risk any damage to the engine. Please help.

Thanks Neil.

Hi

My S-type R, says 120 kpa on the cap which I just googled is 17.4 psi

and I just had a look on ebay and some are marked up 140 kpa which is 20 psi

thats quite a bit of pressure, they do it because if you raise the pressure, it raises the boiling point, so stops overheating, water can be run hotter

cheers

Joe

Hi Joe

Tank you very much 20 psi is a lot but it makes sense .

I will check with a gauge just to make sure it doesn't creep up.

Thanks again Neil.