TurboII2NV

after driving my T2 today for about an hour or less
I looked at the cooling hoses and the were extremely pressurezed ready to blow
I am not sure why that was happening
It never seemed that much before, or maybe I just havent payed to much attention?
what do u guys think

WAYNE88N/A

They ARE pressurized, if your rad cap is doing its job. The upper rad hose, in particular, will get extremely hot and "pliable" during normal operation...

TurboII2NV

oo ok
so its all good
it should be thattt extreme pressurized
and yes the upper had more pressure than lower

NZConvertible

The cooling system runs at 13psi (nearly double atmospheric pressure) so the hoses will feel pressureised, but they shouldn't really look pressurised. Exactly what did you see? A faulty radiator cap can cause over-pressurising, which can split hoses.

marlaman

Also wouldn't old radiator hoses become ----what's the word i'm looking for here--like extra squishy and more prone to expanding? if you're concerned about it why not go ahead and replace your main hoses with new ones.

just a thought,
Matt

NZConvertible

Generally old rubber becomes more brittle and less flexible, and thus more likely to split when forced to expand under pressure.

TurboII2NV

thanks guys
the hoses are almost new
but I will go change the cap as well
and if its still the same I guess its got to be that way

TurboII2NV

ooo yeah I forgot to tell u guys this:
when I got my new j-spec motor it came with a rad cap that does not have an overflow nipple and a different cap (with no spring) than the one that was on my car stock

and my original motor had an overflow
would that make a difference if I switched it over?
I really had no choice

WAYNE88N/A

The cap with no spring should go on your thermostat housing, the "sprung" rad cap should go on your radiator. The "neck" for the rad cap should have a "nipple" for overflow...If not, you might be able to install a new OEM one on the radiator, otherwise your sprung cap is there for nothing...

TurboII2NV

well right now I only have one cap with no spring and no overflow connected
and the cap is located at the thermostat neck
I have no cap on the rad

NZConvertible

You must have a pressure relief cap on the neck with the hose that goes to the overflow reservior. Otherwise there's nothing to stop the system pressure continuing to rise past safe levels. Sooner or later you will pop a hose...