Hi Folks, I still can not find the area in the forum to search for specific problems for the DISCO 1 so I'm sorry to bother y'all with this but I had a high temperature problem and after replacing the water pump, expansion tank and thermostat I am happy to report that the temp gauge stays right where it should be but sometimes after about 30 minutes of hard driving the oil light comes on and there is plenty of oil in the engine. Is there/are there some things I should check to determine how big an issue this is?

Thanks,
Peter

 

The oil light is set for 8 pounds so your less than that, not good. Rocker shafts where the pillar mounting bolts go threw are great spots for deposits to build. The block galleys to those pillar oil ports also gets occluded by baked oil. The oil pressure sensor is under the A/C compressor, not easy to see but if it's leaking through the diaphragm vent it's shot. Most of us use Rotella 15W40. 10W30 is way too light. Depending on air temps you can use 20W50.

 

Thanks, those will be the first things I check! Hopefully it will clear things up a little

 

Just a headsup re: The Oil Pressure Switch (STC4104) if you replace it remember to have the washer and oring(most come with it).

More importantly, be sure the threads are engaging straight when you put the sensor into the front timing cover. If it cross threads it's a huge PITA to fix. For one it can strip and another the front cover can get a crack in the threads (don't ask me how I know this).
Just take your time, put a little oil on the threads, and seat the sensor.

RE: How to SEARCH in the DI section(or any section), have a look at the 1st pic.

 

I'll admit that I generally grab whatever Rotella is on the shelf. Either 10W30 or 15W40.

Given that I change it every 5-6k miles I'd hope that it doesn't really matter all that much but I'm here to learn why I should stick with 15W40 even in the cold months. I don't know enough about oils.

When you say "way too light" that sense of "oh geez, what is the next project on the truck" creeps into my brain.

 

Walt, it's pretty much temperature dependent. Since your in a moderately cold climate in winter and the majority of wear is going to be at start up your safe running lower weight cold viscosity oil 10W30 (I ran synthetic T6 instead of the T5), summer weight for you should be 15W40. Since the OP is in Austin with generally warmer weather they should run the high cold weather/warm weather to put some pressure on the pump with a worn/occluded motor.


No worries Walt, your safe in either case. I noticed my oil light would stay on longer than I was happy with during the coldest weather here so went to lighter synthetic oil for starts. In my Splaturn I run 5W30 synth year round, it's clean and tight and doesn't have issue during cold weather startups. The Heep will be T6 this winter, like starting a tractor.