Plain Jane OEM nothing to see here rebuild

[JustJeff]

Plugs had to be ordered and they will be here on Tues.

One thing I forgot to mention. I had always assumed the fouling plugs is due to coolant seal leak. Thoughts on this?

[JL1RX7]

Or it running too rich, too much premix/oil. Those would be the big ones. If I recall correctly their used to be a sticky on the evil forum showing all the different pictures of plugs and what they mean. Always something useful to have to do a quick visual check of what you got.

[RETed]

Originally Posted by JustJeff

One thing I forgot to mention. I had always assumed the fouling plugs is due to coolant seal leak. Thoughts on this?

Yes, coolant on the spark plug tips will kill them in short order.

You can do a quick & dirty test with a DMM...
Measure resistance from the spark plug wire end to the center electrode (in combustion chamber).
Check this same measurement on one of the brand new spark plugs.
The used spark plug should be *less* in resistance due to the center electrode wear down slightly.
If the spark plug is "fouled", the resistance is going to be significantly higher.
I forget what what these NGK BUR/EQ's spec around, but the number 1.1k-ohm sticks in my head?
Don't quote me on that...


-Ted

[JustJeff]

Originally Posted by RETed

Yes, coolant on the spark plug tips will kill them in short order.

You can do a quick & dirty test with a DMM...
Measure resistance from the spark plug wire end to the center electrode (in combustion chamber).
Check this same measurement on one of the brand new spark plugs.
The used spark plug should be *less* in resistance due to the center electrode wear down slightly.
If the spark plug is "fouled", the resistance is going to be significantly higher.
I forget what what these NGK BUR/EQ's spec around, but the number 1.1k-ohm sticks in my head?
Don't quote me on that...


-Ted

That's some pretty resourceful thinking. Plugs will be here Tues. and I'll get some measurements and report back.