chris383

Hi, I added some seafoam to my engine, through the PCV valve, slowly. Engine did not stall out. started it, smoked, ran fine.

I drove it to my girlfriends (70 kms) and on the way home, about 5 min from my house, it started to knock. Sounds like a rod knock. It goes away at idle, and even at low speeds, but comes back at about 1500 rpm +


any thoughts?
This all occoured AFTER it had run for about 110-120 kmns from the treatment

If its any help., I have vbeen getting a code for 0301 from CYL1 misfiring.

Did I throw a rod, any easy way to diagnose it before it goes to the garage?

Potomacduck

If you threw a rod your rig would not have left the driveway.

I will take a wild guess and say you may have a burned valve.

Keep us updated on this one.

chris383

Thanks. I know I didnt throw a rod DURING the application, but is it common at all to have it go during cruising at 110km/h? I literally had the cruise on the whole way home, got off the highway on a ramp, and after I got going again at the stop sign, the knock was there.
Any tips on diagnosing? What about Carbon knock?

Thanks again

BigBallsMcFalls

tune-up in a can and then engine noise afterward ?

time to pull it apart, tune-up with your hands

blake.nemitz

chain slap inside timing cover?

blake.nemitz

ah i see sometimes a dirty motor isnt such a bad thing when i seafoamed my buddies 4.0 jeep yea i know heep! it started leaking out the rear main and oil pan gasket.

Texas_Ace

It depends on how loud it is really. Also did you put it in the oil (please say no)?

I always change my oil after a seafoam/water treatment. It will get into the oil and will break it down. So i always do it just before an oil change.