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    Now what? Oil pressure came back.

    I'm not an expert on these engines but want to relay my experience. This was newer 7.3 which is not IDI; however I expect the oil pump may be of similar design. It had the same "idiot gauge" which has only two positions, 0 and "normal" and does not actually read pressure. The truck would often...
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    AC Experts, Weird Issue

    That's an interesting failure. The fact that the accumulator-drier was not sweating indicates that there was too little liquid refrigerant entering the evaporator. All of the liquid going into the evaporator was boiling off and only vapor was reaching the accumulator. Normally that would be...
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    Stalling, now won't start - metering valve and....

    Well, here I am replying to myself. I got it running. Something in the distributor head end of the pump must have been stuck. I first tried tapping on this with a brass rod and small hammer. That didn't help. Then, I set up a heat gun (such as for shrinking heat-shrink tube, melting paint...
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    Stalling, now won't start - metering valve and....

    Hey folks. I am working on a 1985 Oldsmobile diesel engine. It has the DB2 pump which is so well supported here on the forum. I'm working on a friend's car which has been stored at my location for about 2 years. I have been driving the car every couple of months, about 20 - 30 miles each...
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    Anybody using r152a

    Hey folks. I've done quite a bit of testing with R152A. It really works well. Here is a video where I have the can tap, adapters etc. shown and part numbers. Sincerely, David
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Good to know - I will check into these.
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Thanks, I will contact him when I return home. I am not sure the engine has a matched set of nozzles. There is one I installed from another year of engine and it should be same part but I am not sure. The others were in the engine when I got it. Engine did not run correctly beforehand because...
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Thanks for the followup. I did make some progress with it. Upon advice of another IDI expert; I re-did the test where one fuel injection line at a time is loosened. I found one cylinder which, when loosened, would stop the idle tapping noise. So, I installed a different fuel nozzle in...
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Thanks for the insight. I was thinking the same thing about a lifter. Can't think of any other part of the engine that can ever "change" like that - one minute it taps, the next it's quiet. I had some other things to do today and didn't get to work on it. Will work on it more and hope to have...
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Thanks for the response! Interestingly, the 4.3V6 Olds Diesel shares almost nothing in common with the 5.7 V8. The V6 was designed as a diesel from day-one and was longer lived than the V8. If I remember, the only significant internal parts that interchange are the piston rings. The bearings...
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    It could be one bent pushrod, possibly. I was able to rotate each pushrod by hand and could not detect any bend. The problem with that test is, there is only a small amount of pushrod visible at the top without removing the intake manifold. Depending on the time I have today, I may pull the...
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Cool, that's neat that they used that engine as a teaching aid. We still have a couple oldies at our shop, too. They have an old 3208 and a couple D399's.
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Here is a video I just made of the engine running with valvecovers off: https://www.youtube.com/watch?v=-v8BcI_fbTg Note: If video doesn't show up, it may not be completely uploaded yet.
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    Engine tapping noise, comes and goes, OldsDiesel 4.3V6

    Hey folks. I'm new here, and have a very unique project going on. I chose the 6.2 forum because it seems the closest to the type of engine I have. If there's a better place, it won't hurt my feelings if the admins move it. I'm working on a 1984 Oldsmobile Cutlass Ciera with the 4.3L Olds...

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