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Damian · 10-23-2013, 10:57 PM

It has the stock exhaust manifold. From everything I've done so far, I know it's cylinder #3. I just don't know what else to check. I know it's not the rockers, lifters, pushrods, injector, spark plug, plug wire, distributor cap or rotor, or the rod bearing. The piston easily moved on the wrist pin before install, the rings all have the correct gap, it's not piston slap because tempurature makes no difference either. I think my last thing to do is pull the head and look at the valves on that cylinder.

I should add that it's a 98 Wrangler with the 2.5L I4. It runs just fine other than the knock. It even passed smog too.

10-23-2013, 10:57 PM	#3
Damian Senior Member Join Date: Jun 2009 Posts: 2,509 Tweet	It has the stock exhaust manifold. From everything I've done so far, I know it's cylinder #3. I just don't know what else to check. I know it's not the rockers, lifters, pushrods, injector, spark plug, plug wire, distributor cap or rotor, or the rod bearing. The piston easily moved on the wrist pin before install, the rings all have the correct gap, it's not piston slap because tempurature makes no difference either. I think my last thing to do is pull the head and look at the valves on that cylinder. I should add that it's a 98 Wrangler with the 2.5L I4. It runs just fine other than the knock. It even passed smog too. __________________ 93 GMC Typhoon: new money pit/PITA. Now GT3788R powered. Boost, because sometimes atmospheric pressure just isn't enough. "If it has tit's or tires, you can be pretty sure your going to have problems with them..."