My gold trip is on again and I have decided to take my Mitsubishi Pajero 4x4 which currently has gummed up injectors from having used WVO.
My Pajero has been sitting for 4 years, now it's time to overhaul the injectors a project I thought worthy to share.
The picture below shows one of the injectors dissembled, you can clearly see the varnish. I have them soaking in paint remover. Later today I'll get a quart of fresh diesel for reassembly.
Once the injector is reassembled it's hooked up to a pop off tester, the tester will give the pressure at which point the diesel ejects from the nozzle, show if the nozzle leaks and so forth. If the pop off pressure is to low or high shims behind the spring are added or removed to correct the situation. If I find the nozzle drips or leaks and will not hold pressure a replacement is installed.
Factory specs for my injectors to pop is set at 150 bar - 2175 psi.
The bench top tester I have came from a generating plant designed for remote locations where the mechanic would have overhauled any faulty injectors on site. For those that would like to build their own here are some excellent instructions for a DIY pop tester.
How to build a diesel injector pop tester - PeachParts Mercedes ShopForum
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