Well I got my CHT out finally, This doesn't look good Options

[Nozzle]

In preparation for the trip to Hershey this weekend, I wanted to troubleshoot some very poor cold starting that had developed recently. To check the health of the CHT sensor I pulled it so I could verify cold and warm readings. Odd thing was how much effort it took to remove. I'd read these things should snug but not be in very tight. So I finally got it out and this is what I found:



I'm no expert but that sure looks like aluminum filling in the threads. I have a correct replacement but I'm worried about trying to thread it into the head at this point.

So my question is how screwed am I now and what is the best way to go forward? Any thoughts or experience in this area would be much appreciated.

Thanks,

John

[skeates]

Also - if you need to hack something together to get you going a potentiometer (variable resister) can be used to manually simulate the CHT sensor. Think of it as an electric choke. It's a bit of a hack, but it would certainly get you on the road if you needed a couple of days before you had time to drop the engine and do the fix correctly.