I seafoamed my 91 SE the other day which included pouring a small amount into the intake (through the power brake vacuum), letting it sit for five minutes, and then cranking. It backfired when I cranked it, then it fired up fine. However, there is a pronounced clicking noise that rises and falls with engine speed. This sound completely disappears when the clutch is disengaged. And it fades after driving for a while. Otherwise it runs fine. Any thoughts?

 

change the oil

 

By suggesting that I change the oil I assume that you think that I have a stuck lifter or something. But why does the sound disappear immediately when the clutch is disengaged?

 

no...i'm suggesting that because...
- i don't know what u actually did w/ the seaform. you're not really supposed to pour it in when the engine is not running. people usually have the motor run and let the vacume pull in small mounts of seafoam to clean the carbon.

- depends on the amount of seaform you used you might've thinned out the oil enough to cause a tap sound...lifter perhaps?

- you might've cleaned out the motor enough to cause a loss in oil pressure...causing the lifters to starve for oil.

i don't know the condition of your engine, i don't know what you exactly did w/ the seafoam, i don't know the amount you used.

changing the oil is the cheapest thing you can do to make sure the oil that's in the engine is ok.

 

hmm my friend had a problem like that with his integra....would make a grinding/tapping sound...and it would go away when he pushed the clutch to the floor.....it ended up being a bad bearing in the tranny...

 

What exactly does seafoam do? is it like a heavy duty engine cleaner? and whats the longest it should be ran in an engine?

 

http://www.seafoamsales.com/motorTuneUpTechGas.htm

 

check your throwout bearing