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I have read a lot about how to pre-oil an engine lately. Most people say the acceptable method is to fill the sump with mineral oil, pull the plugs, then run the starter for 30 seconds (and a 5 minute cool off) to circulate the oil. My concern is what happens to the cam before the oil gets to it? So I decided to play it safe and pre-oil my engine. A commercial pre-oiler is quite expensive -- $180 ! I decided to make one out of PVC (schedule 40). So, although it does look like a pipe bomb, it is actually a crude pre-oiler.  The top side has a removable lid where oil is poured into. The red substance on there is some grease I had to make the top easy to install and remove.  On the bottom is a bunch of reduction fittings, a 90 degree fitting, ball valve and a fitting to connect it to an air compressor. The idea is you fill it with oil, then add compressed air, and then the oil will shoot out of it, into the engine, as the compressed air within expands.  So once its full of air, I would swap out the fittings for a connector that will interface to the engine. Sounds easy? Lets hope it works. 
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Last Modified: August 13, 2023 |