Jeep Strokers

I have an 82' scrambler with a 4.7 stroker. I built the motor 2 years ago and has never been quite right. I just had to put new pistons and rings in it because of a tick noise. Piston closest to the firewall had shrunk do to some overheating and was slapping the cylinder wall. I put on about 50 miles and now having the same sound. Pulled the oil pan to inspect and looks as though I have detonation in 3 of the cylinders so far. The piston closest to firewall is slapping the cylinder wall again. I need some help, advice, anything! I have dumped so much money into this motor and feel like giving up. Thanks in advance.

The no.6 cylinder is furthest away from the water pump and will run hotter than the others if there's a blockage in the cooling passages of the block preventing proper circulation of coolant. There could be some ovality in that cylinder since the piston was slapping around inside it.

You just put now pistons and rings in w/o a bore or hone?

No, I did have the block honed. I run an aluminum radiator with electric fan. The temp never went over 190. The thought of a blockage makes sense. Thanks I will look into that.

Did you go with over sized pistons, or stock with just a hone?

I am running .060 over icon pistons. I did find some info today on my injectors. TOO BIG! 30lb viper injectors. I am going to pick up a set of #24, replace the pistons, rings and bearings. Also change my fan temp switch to be more accurate.

strokedcj8 wrote: TOO BIG! 30lb viper injectors. I am going to pick up a set of #24, replace the pistons, rings and bearings.

Holy crap those are huge! Who's idea was it to use those? I wouldn't doubt it if your oil is diluted with fuel.