Could someone please show or explain to me the procedure used to pressure test an engine. I have some ideas and still some concerns I might do more damage than good.
do you mean the cooling system?
Yes! The head and block as an assembly. I'm not concerned with the radiator. I've got a rebuilt, welded block that I want to check the integrity of the weld. I've had welded blocks in the past that held up quite well but I'm concerned with putting a lot of work into this block and then finding a problem. I suppose I could use mag particle or dye penetrant but I think a pressure test would tell me a lot.
Make a blank off plate for the water outlet in the head and another for the water inlet. Drill the inlet plate and install a valve stem for a tubeless tire. With the head assembled to the block, pressurize to 20 PSI or so and then take a spray bottle with very soapy water. Now spray the valve chamber area and everywhere else looking for bubbles.
I have also seen but don't care for people installing a pressure gauge and monitoring but that likely works also.
Thanks Gary. That pretty much described what I was considering. I wasn't sure about PSI but seeing as how I'm not attempting to turn it into a pressure vessel I think 20 PSI should be more than good enough.
if the head is on eng. cut an old inertube and clamp to each outlet and use the air chuck to pump it up. I dont know how much pressure you can get before tube blows out but I wouldent want to put to much pressure in block anyway
Made a plate for each of the water in and out. Drill and tap plate for a 1/4" pipe thread. Now get a 1/4" h2o regulator and connect to the in or out. On the other in or out, connect a valve with a tee and a gage. Hook the h2o regulator to a garden hose and turn on the h2o. Set pressure to 5 to 8 PSI and sit back and watch for a leak. Safer that using air pressure. NOTE: This can also be used for running an engine without a radiator. Dan