I have heard several pros and cons about where to place cylinder head temperature (CHT) probes. One placement is at the sparkplug gasket (substituting for the sparkplug washer?). The other location is under a head bolt (exact head bolt varies). The sparkplug location would tend to have higher temperature readings than under a head bolt. Then there is the wear and tear from checking and changing sparkplugs. Does the sparkplug washer provide a better seal than the thermocouple washer? Is there any concern for how far the sparkplug goes into the cylinder using different washers? If I put the CHT probes under head bolts, would the entire set of head bolts need to be re-torqued or just the one bolt with the probe? Does it matter which brand of engine for the above considerations?
Sid Wood Tri-gear KR-2 N6242 Mechanicsville, MD, USA sidney.w...@l-3com.com Mark Langford wrote... ... I'd had the sparkplugs out and when I put them back in one of the CHT probes (which I noticed wasn't looking that good) got a little twisted and frayed. That allowed one of the sparkplug thermocouple probe wires to short, which makes the EIS a little crazy...
