the 71 cooling system wont build up pressure

[R72K5]

ok i ran the 71 today til it was way plenty hot, drove it around the neighborhood and all that good stuff, after got brakes going again and axle and trans filled and all that, you know how all that goes,


i noticed that the cooling system has no pressure in it at all,

everything was hot, hoses, radiator, engine, all of it, was fine

was just no pressure felt in hoses, soft, easy to collapse

what might be the problem ?

truck sat for many years not running

today was the first time it saw pavement and drove on it and all that... for mAny years, since 96 or maybe a little earlier possibly it looks like, from the research ive done


so,,,


thanks

 

[4X4HIGH]

Replace the radiator cap. That is what allows pressure to build up, most caps are 15-16 lbs. This should cure your problem.

 

[R72K5]

Replace the radiator cap. That is what allows pressure to build up, most caps are 15-16 lbs. This should cure your problem.

ohhhhhh yeaaaaah

forgot about cap
yep i bet it is whats wrong too! its old and rotted, humm

or i hope thats what the deal is,


cool thanks