Oldwolf

Can you help me and explain if this bolt and sensor is Olds parts? I found it in a box with engine fasteners for a olds 350. Is it Diesel stuff?

Lady72nRob71

Wow - never seen such a beast!
Knock sensor??

MDchanic

Sure looks like it could be a knock sensor.

Definitely not original.

I had an '80s-vintage knock sensor / timing retarder on my '68 back in the '90s. It didn't work.

- Eric

Octania

~1968 Toronado Hot Engine sensor

MDchanic

Really? So it's OEM?

I've never seen one.

Water temperature sensor wasn't good enough for them?

- Eric

MDchanic

So it's this thing, I take it?



Do you know what their rationale was for using this?

- Eric

rocketraider

Yes. 68-70 actually.

Toronado developed a reputation early on for very high underhood temperatures as the low hoodline restricted airflow and heat dissipation considerably. That's why it is important on an early Toro to keep all the radiator seals, shrouding, and air dams in place- so airflow goes THRU the radiator instead of around it.

The 66-67 cars had temperature gages; 68-70 used a pair of warning lights for engine temp. The sender on the intake triggered the normal red HOT light, the one in the head bolt (LH head, in the bolt directly above the trans dipstick) triggered a flashing yellow STOP ENGINE warning.

orange442

All the 350 diesel motors I just tore down had one of those. I had read a post previously about a guy tearing a DX apart and he could not get the head off one side. He talked to engine guys and all the other guys that posted were saying to check head bolts but he said he had checked many times but they were all out. He finally saw the bolt under the sensor and was very embarrassed to say the least.

Oldwolf

OK! Thank you all for the fast answer. Good information, maybe i can use it for a warning light. Toronado seems right for me, i have the tilted oilfilter housing in the box as well.

Stanley