TheSamba.com :: View topic

Thu Jul 03, 2003 8:01 am

My engine developed a popping noise yesterday which seems to originate in the carb.
There was no popping noise before I changed my exhaust, but after I changed it it began. I pulled the exhaust off and RTVd the gaskets and I thought it stopped it last night, however, I went out this morning to move it and the sound was back.

Someone mentioned pulling the plugs one at a time to see if it stops- I did and it is #2.

What does that mean?
Is it serious?
I haven't driven the thing- it has sat while I did some hole patching in the wheel wells.

Thu Jul 03, 2003 9:07 am

Sounds like it might be a sticky valve. Does it stop after the motor is warmed up?

Thu Jul 03, 2003 9:16 am

hmmm- haven't tried. What would warming it up do?

Thu Jul 03, 2003 11:37 am

It sometimes frees up a sticky valve.

Thu Jul 03, 2003 1:35 pm

If it sounds like it's popping popcorn, especially as the rpm increase, then it is probably a leak in the exhaust system. Jeremy
ps what are your exhaust gaskets like? Keifernet posted recently that the ones with the gasket sandwiched in metal are the good ones.

Thu Jul 03, 2003 1:39 pm

I have the metalic gaskets. I took the exhaust back off last night and put RTV on the faces and the retightened the bolts. I took it for a ride after and nothing. I go out this morning to move it, and the noise is back. Checked for leaks at the gaskets and there are none.

As I mentioned. If I pull the #2 plug wire, it stops. Plug it in, it pops.

Thu Jul 03, 2003 9:09 pm

Sounds like the intake valve on #2 is too tight or sticky. If you know how to adjust valves then you should check them and probably loosen this one up a little. If it is sticky then it should stop when the engine warms up and the valve guide expands a little allowing the valve to move more freely. I'm not a big fan of additives, but I have used Chemtool and Sea Foam for sticky lifters with good results. I prefer Sea Foam. You will probably need to go to a parts store to find either. Whatever it is it doesn't sound serious. Good luck.