I think you're right. I noticed this morning that the needle was pegged to the left of 140 when I left for work, and on 140 when I got here, so its working, just not getting hot enough. There's no flow there.

Originally I wanted to put the sender in the oil pan, but afer researching it on here (this forum is a godsend) I found out what a PITA it is to remove, so I thought I'd try the tee. Guess not.

OK, could I weld a bung in the oil pan while its still on the truck? How's this procedure- Drain the oil, drill the hole, remove internal shavings with magnet, flow nitrogen through drain plug while welding bung.

Or am I begging for a carbeque?

1990 Monty LS 3.0 A/T LWB. KYB front shocks, OME rears and coils. 33x10.5 BFG Muds. 5.29, 2.85, RD110, RD46. 2 bouncys. Aisins. Monte Disco swaybar disconnects. GenII t-arms, idler arm, UCA's, V45W front brakes. 2in BL.