Manager Forum

I guess I'm having piston slap, as I've been reading. I have a knocking noise until it reaches operating temp. Then the noise goes away, not all the way I can slightly hear it still.

Is there any way to determine which cylinder it is?

I would do a compression test first. Then I would use a stethiscope next if comp doesnt tell ya. Another thought is the possiblity of an injector?

Do you mean an injector going bad? Would that make the engine knock?

Possibly. I would get consent from customer to remove the right valve cover and check the t-chain for slap while it is cranking. Then If I didnt find anything I may consider removing th oil pan to check for sludge. The lifters also have known problems. Did you check compression?

There is no sludge. The #8 cylinder only has 75lbs of compression. The rest are all over 100lbs; the spark plug is black and wet. The rest are like new.

Jasper. ANd dont forget all the stuff associated like mounts, belt, hoses, tstat, water pump, plugs, etc

you probably have a collapsed piston. on a limb here and i mean a limb, what years did chrystler offer a 10 year 100k warranty? is this the engine that would blow the lower gasket under the plenum causing a lean condition? i've seen issues caused by this that are very hard to explain. i had a few of these that had sucked just enough moisture (from humidity) to burn holes in pistons. i had one that looked like someone had dripped hot solder on it. jasper is the way to go. install kit along with radiator. i would probably also throw new tranny lines into it. they're such a pleasure to work with and the updated ones are sooooo easy to install. ya, ya, i know, shut up steve, but i have to add, if you do throw a mill into it replace the flex plate as well and be real careful aligning the transmission and engine.