[mitchntx]

Glenn has done tons of research on this and we are both about to the point of have custom machining done.

Autometer guages have a sending unit that is 1/8" NPT.
An LS1 motor has ports machined in, but are 12x1.5 metric.

Sure there are adaptors, but the wall is so thin the adaptors twist off with MINIMAL torque. And by that, not enough to crush a seal enough to prevent a leak.

Why don't they make a 12x1.5 sender?????

The stock sender ohms out WAY different ... almost 1K ohms lower than the AM.

[steve-d]

You can contact Auto Meters service tech support department for a 12x1.5 adapter that does not break. if using an Auto Meter short sweep electric temp gauge, they will sell you a adapter and sender for $18.49 and free shipping to the US. If using a Auto Meter Cobalt or C2 full sweep, the adapter only is needed with no new sender for $12.00. I have installed several with great results. The replacement sender does not have an extended probe so the adapter can maintain a thicker wall thickness. It is also not in the way of headers.

Where to install the oil temp sender??

I note Cory's suggestion to use the adapter w/short sending unit. It'll solve the problem regarding the use of the water sending unit somewhere. (I place the water sending unit behind the starter motor and it works like a chmap!!) But my problem is where to place the oil temp sender.

This is what I did: I installed the oil temp sending unit in the top hole of the LG adapter plate. The headers are close, very close. They're SLP and actually had to be dented in at the spot where the header tube would've interfered w/the adapter itself. Installation of the adapter plate would've been impossible unless the header tube was dented or the adapter plate was gound down and the hole welded!

During the track event the oil temp sending unit must've become overheated from the close proximity w/the header tube. The oil temp gauge was pegged! A totally useless effort!

It couldn't be the true temp as the water temp was fine.

Where's another place to spot the oil temp sending unit? I'm tempted to just drill away at the oil pan, but I don't like the idea of metal shards ending up in the pan. Something my mother told me about mixing oil and metal filings causes me to hesitate. With my luck, I'd end up drilling thru the oil pick up or something else requiring the removal of the engine! (IMG:http://www.frrax.com/rrforum/style_emoticons/default/mad.gif)

IAE, short of that solution, is there another spot to mount the oil temp probe so its submerged? How about a "T" fitting between the braided hose and the LG Radiator? Anyone have feelings about that despite it's so removed from the engine?


What a headache!

Steve