at the start of this I had the popping they say you get with head studs. I looked and could see 1 broken stud so I pulled the motor to fix studs and chain tensioner. the motor ran well and pulled good until the popping started. I think now the popping was the bad plug as I only found one broken stud. I sent out the heads for rebuild.
I did not do a leak down test or compression test. I thought I was just pulling it down for broken head studs. when I removed the cam Carrier on the 1-2-3 side number 3 head had a big red x on the head. ( not good thing to see ). next thing I did was pull the spark plug it was fouled. black hard stuff not really oily or sutty just black. the first thing I thought was rings. now I am not sure. I find out it could be a number of things.
not sure how to move forward. I can leave 1,2,4,5&6 p and c together and pull #3 apart to check the rings. if they are good put them back togather and use them. the motor had 48k miles on the clock. am I on the right path?
I tried to take a pic. of the plug not to good. also I took pic. of the cylinders and piston.
