Pinto loss of oil pressure

[aidey2000]

Pinto 2.1
Blew its head gasket ...tiny blow ...Caught quickly
Had head checked all good (just in case)

Decided to re-ring her and check big ends as a matter of course ....
No issues found ....

On restarting oil pressure very low 18-25 psi
Tried the remove distributor and spin pump up with electric drill but gave same results ?
Even removed the electric oil sender and temp replaced with a pressure pipe sender ..same result as the electric version

My oil pressure has disappeared ?

Any ideas ?!??

I thinking the pump has died ?!?!

[Justin S]

Sticky pressure relief valve sticking?