leaking around the spark plugs

[bansheeboie]

i just put together a 4mil drag motor and did a leakdown test and noticed that it was leaking around the plugs, i swapped out plugs thinking it might of been those but it wasnt. also has brand new oring kit installed. so what else kud it be?? the dome threads maybe?

[lms1977]

try to put some grease on the threads and see if it gets better that would tell ya if it has something to do with threads

[bansheeboie]

i put sum grease around the plug threads and lost 1psi in 17 minutes. does that mean my dome threads r messed up?

[Paulie B]

If they are new plugs then I've been there done that. You have to compress the washer they come with. This sometimes gives your hand a false reading cause you think they are tight.

Keep tightening them down until it gets really hard, or like Zillafreak said....

[lms1977]

1 lb in 17 min sounds good to me

[Paulie B]

1 lb in 17 min sounds good to me

^Agreed. Totally acceptable, I've ran worse with zero problems.

[old put-put]

i just put together a 4mil drag motor and did a leakdown test and noticed that it was leaking around the plugs, i swapped out plugs thinking it might of been those but it wasnt. also has brand new oring kit installed. so what else kud it be?? the dome threads maybe?

 

I use anti seize on threads( aluminumto steele might strip if it gets corroded or galds a little) and torque to 14 ft lbs. 14 is the proper torque on the spark plugs.

[bansheeboie]

Ok cool, time to go grab some race fuel lol. Thanks on the good info fellas, I appreciate the help lms and others.