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Tractor Transporting Discussion Forum

Re: Chevy to Cummins Conversion

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Author  [Modern View]

10-12-2017 18:27:52

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"If I'm not mistaken, using sending units would require the services of the computer."


A '94 Chevy truck would have an oil pressure sender and 2 temp sensors, the oil sender operates the gauge directly, as does one of the temp sensors (the one in the LH head), (the temp sensor near the t-stat keeps the 'puter informed of coolant temp).

Simply adapt the old oil pressure sensor and correct engine coolant sensor to the Cummins, (using reducer bushings, if needed), and hook them up to the main wiring harness, the gauges won't ever know there's a Cummins under the hood, and will work as before.

Having seen a couple of engines ruined by a melted or worn-though plastic oil gauge line, or a worn-through or cracked/broken steel or copper line, I'd stick with the electric gauges.

Yep, the drivers/operators should have noticed the loss of oil pressure (and oil) in time, but it doesn't always work that way in the real world!

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Walter Buller

10-18-2017 20:15:00

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 Re: Chevy to Cummins Conversion in reply to Bob, 10-12-2017 18:27:52  
Bob, doesn't this depend on the Chevy still having the original wiring harness? We don't have it. We took the truck on a test run today. Got it up to about 60mph. For some strange reason the wire coming from the temperature sending unit and going to the auxillary temp. gauge shorted out near the firewall. Plus we still can't get the speedometer to work. We installed the "Cable X Box" but just can't seem to get the wiring right. I'm about to just install a GPS speedometer and be done with it. But then I won't have cruise control. Also, there is absolutely no room under the hood for an AC compressor. I hope to figure out some alternative means to provide cool air for the cab. It gets really hot down here in the summer.

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Walter Buller

10-13-2017 07:45:43

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 Re: Chevy to Cummins Conversion in reply to Bob, 10-12-2017 18:27:52  
Thanks heaps. My "93 D-350 has both stock and auxillary gauges. So I get 2 oil pressure readings plus exhaust gas temperature, fuel pressure and turbo boost.

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