could somebody help me out with a part number for the o-ring on the water pump bypass hose. 95 toyota camry 2.2l

 

I believe this is it but i'm not sure. It seems to be the right size

Victor Reinz Engine Coolant Water by Pass Gasket B45772 | eBay

 

Appears to be the correct part number.

The specific P/N is sold through various vendors. Try the dealer if needing it in a harry.

O-rings typically being standard size, you can measure it and check hardware, auto and hydraulic stores.

 

Another question.... Does any body know the nut size(thread size) for the 2 nuts that hold he thermostat housing

 

Most likely 10mm dia x 1.00 pitch. It's a standard metric size. Try hardware and other stores.