I had already searched and read several threads about pop testers made from jacks and grease guns, and made mine this way because it was much easier to make since there is no tapping, welding, or epoxying of multiple fittings needed like in all the other threads I have seen. My pump has higher volume per stroke so not as much pumping needed.

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87 Mercedes 300TD, 81 300D, 95 Dodge Cummins 4x4