Losing Pressure After WP Install

[Marccus]

I am installing a new CPS, water pump, and lower radiator hose. The system is completely empty of coolant.

I torqued all bots on the WP and I am getting a loss of 1.25 psi over 5 minutes.

I tightened all the hoses, especially the lower one, and rechecked the bolts on the WP.

I'm still losing pressure at about the same rate.

Is this rate a problem?

Should the system only be pressure tested when it is full of coolant and the loss of pressure in an air filled system is to be expected?

 

[K-Dawg]

Crank it up to 15 psi and figure out where it is leaking from.

 

[Exitwound]

It's air and that amount of loss could also be coming from your tester. I would fill the system run it then test it.

 

[Marccus]

:thankyou:


OK. I'll do that.

There really anything I can do anyways. I'm not taking that WP off!!

 

[yzstud]

I am installing a new CPS, water pump, and lower radiator hose. The system is completely empty of coolant.

I torqued all bots on the WP and I am getting a loss of 1.25 psi over 5 minutes.

I tightened all the hoses, especially the lower one, and rechecked the bolts on the WP.

I'm still losing pressure at about the same rate.

Is this rate a problem?

Should the system only be pressure tested when it is full of coolant and the loss of pressure in an air filled system is to be expected?

did u use any sealant on the wp?
any AIR LOSS is unacceptable, that obviously means its leaking somewhere
it should be pressure checked without coolant in, apply a little less pressure then the cap is rated for, if there are any leaks besides the tester then you will be able to hear them, if you can't hear them(which you should be able to hear it if you aren't deaf) use some soap+water and you should be able to find them
It should hold steady pressure for 10-15 minutes
I do this procedure twice a day everyday at my job building engines

 

[itwonder]

Get some bubble soap from the dollar store. Pump it up to 15 psi. Squirt a bit around each hose connection, the WP shaft, tank end caps on your radiator, radiator drain valve, tester connection to tank. Pay attention to all of the heater hoses and the little coolant hoses at the TB. Check the crossover tube that runs under the intake. You can view it by peeking in the cracks and using a small mirror.

 

[Marccus]

did u use any sealant on the wp?
any AIR LOSS is unacceptable, that obviously means its leaking somewhere
it should be pressure checked without coolant in, apply a little less pressure then the cap is rated for, if there are any leaks besides the tester then you will be able to hear them, if you can't hear them(which you should be able to hear it if you aren't deaf) use some soap+water and you should be able to find them
It should hold steady pressure for 10-15 minutes
I do this procedure twice a day everyday at my job building engines

Yes, I used gasket sealer on the both sides of the gasket which sits between the WP and the housing.

I'll use the soap bubble method to look for leaks.

Thanks.