Sadly, I can’t say that about every tool I’ve ever acquired. And it was not expensive! And, most importantly, it works. And it has the little trigger pump, which is apparently unpopular with a pressure tester like this, but it really does not require much pumping to make work. It’s all plastic, but it seems like a quality tool. I think all of them nearly equaled the $35 I spent on this Mityvac. I confess, while trying to find the source of Sharka’s water leak, I bought 3 radiator caps from various sources. No guessing or saying “eh, that cap looks pretty old….” and throwing out a perfectly good cap. Description 7075002, 0, Thermometer 7075001, 1, Pressure Testing Pump With Gauge (gauge reading from 035 psi) 7075030, 2A, Black connector for radiator cap. If the cap loses pressure early, you have a bad one. Then you just screw the yellow cap onto the other end and pump the trigger to pressurize the cap. It has a couple of little blue adapters that you can screw your radiator cap into. The Mityvac has one more trick up its sleeve. Just connect to the adapter and add pressure. The cooling system was clearly being pressurized by a piston. And with the engine hot and being revved, I was rewarded with a fluttering needle on the tester. With the engine running, the pressure on the gauge immediately rose a couple pounds over a few seconds. And no coolant could be found anywhere around the motor, so I went on to the running and hot tests.
In Sharka’s case, 1 psi of pressure was lost over the course of a few minutes. If none are found, the Mityvac has instructions for testing with the engine running and then with the engine running and up to operating temperature. If it leaks down, you check all around the engine for coolant leaks. You’re supposed to pump it up to the top of the colored pressure range on the gauge and see if it leaks down (I didn’t do that for this stunt photo because the instructions slipped my mind). To get it up to pressure requires fewer than 10 pumps, more like 5-6. You fit the correct cap to your radiator and you pump up the little gun. It’s not in any position to hold pressure at the moment anyway. I don’t know where it is off the top of my head. Sharka is in pieces and his radiator is… hmm. That's it!īucky, my emerald green NB, is acting as the test subject for the above shots.
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