Thread: changing oil on V8 what is the correct way? (and what is overdoing it)

I was not planning on removing the light itself, just add a gauge. Not sure how long it would take me to get the cover off though, the serpentine GEMS takes a bit more work I guess but it should be all good. I reckon the car won't stand still for THAT long.

-P

You dont need to take the cover off - just unscrew the oil light sender from the side of the oil pump (above the oil filter) and screw in a Y piece or something similar - screw in the oil light sender into the Y piece and screw in the oil gauge sender - all done.

Any chance you know the thread size Then I can simply order a Y piece without taking it apart first.

Thanks!
-P

Sorry no idea - you do need to do some measuring first to get a connector that has the right thread and will fit in the area.

Originally Posted by prelude

Any chance you know the thread size Then I can simply order a Y piece without taking it apart first.

Thanks!
-P

From what I can find, it's 1/2" UNF parallel thread.

very early(as in 99 model D2's) seem to use the same part, IRRC that you have a P38 RR. STC4104

easy to find adapter would be a 1/2" t adapter, where most seem to have a 1/8NPT side thread.
That is, fit the adapter to the original oil warning light thread, then fit the oil warning light to the 1/2" female port, and find a 1/8 NPT sender for the additional sensor.

as an example of an adapter:

I've done this to my tdi, where I have both oil temp and pressure sender, as well as the original warning light sender too .. ie. I've used 2 t piece adapters to have all 3 sensors connected.
One tip on this(what I found) ... don't use gaskets/sealing rings. I've tried them all, rubber/fibre/copper ... for some reason they don't work well. sealing ring worked fine on the std oil warning light sender, just not so good when all sensors were fitted.
Thread sealant fixed all of that up tho, and a bucket load easier to install too .. no fiddling with gasket rings in tight spots then fitting sensors, where two hands may be needed but only a one finger can fit ... kind'a thing.

I was going to recommend to install the additional sensors onto the adapter, then fit the adapter, but this looks painful on the RV8 in this era .. it appears that there's no room for this to work. In fact there doesn't look like much room for the adapter to fit into that space where the oil pressure light switch is fitted.