1969 E33 CD-1212, IO-470-K
So, this question is about the factory onboard temperature probes for Oil and CHT. I'm trying to research, partly to educate myself... and partly to be able to speak the same language as my mechanic.
The onboard oil temp probe is showing erratic readings - it seems to be reading ambient air temps. It appears to be located under the oil cooler, while a secondary (going to an EI UBG-16 engine analyzer) is located in the top of the oil cooler. First, is there a way to troubleshoot the factory oil temp probe? I've searched the IPC and can't find a reference for a replacement part number, where should I be looking? And second, is there an advantage to relocating the secondary probe to the boss under the prop governor?
Likewise, the onboard CHT gauge is not anywhere close to what is being displayed on the secondary engine analyzer. Are CHT probes generally interchangeable between manufacturers, or do I need to find an adapter to fit or piggyback the factory probe with the EI CHT probe? What even is the original part from Beechcraft? Is there a procedure for troubleshooting CHT probes and gauges? Again, my IPC skills appear to be lacking.