My '90 ZR-1 project update thread - ZR-1 Net Registry Forums

tomtom72 · 03-25-2010

Okay with checking to see if the new core will leak I would either use my pressure test kit or I would use one of my hand vacuum pumps. The vacuum pump would proly be the simplest & fastest way....it either pulls a vacuum or it don't. I hate to say this but I would use plumber's putty to seal up the core in & out so I could pull the vacuum! But I'll bet a couple of wine bottle corks would do the trick also!

Cliff is correct

about the PSI in a potable water system. I just figured you could adjust the faucet flow to a reasonable level, fill the core & get thru flowing water and block one of the pipes with the palm of your hand to restrict the flow to put some pressure on the core, but then it is going to leak around your hands.

A lot of guys use that guy from e-bay, partsladie. I've used them for some stuff also. Their prices are pretty good and they will not bend you over with shipping charges.....like GM parts direct.

Good luck on your restoration, and may the Force be with You!

Tom

03-25-2010	#11
tomtom72 Join Date: Dec 2004 Location: Jacksonville, FL USA Posts: 4,645	Re: My '90 ZR-1 project update thread Okay with checking to see if the new core will leak I would either use my pressure test kit or I would use one of my hand vacuum pumps. The vacuum pump would proly be the simplest & fastest way....it either pulls a vacuum or it don't. I hate to say this but I would use plumber's putty to seal up the core in & out so I could pull the vacuum! But I'll bet a couple of wine bottle corks would do the trick also! Cliff is correct about the PSI in a potable water system. I just figured you could adjust the faucet flow to a reasonable level, fill the core & get thru flowing water and block one of the pipes with the palm of your hand to restrict the flow to put some pressure on the core, but then it is going to leak around your hands. A lot of guys use that guy from e-bay, partsladie. I've used them for some stuff also. Their prices are pretty good and they will not bend you over with shipping charges.....like GM parts direct. Good luck on your restoration, and may the Force be with You! Tom __________________ 1990 ZR-1, Black/grey, #2233, stock. ZR-1 Net Reg Founding Member #316 & NCM member