Jump to content

Unofficial Home of Old Simplicity & Allis-Chalmers Garden Tractors

Cylinder Heads, Spark Plugs


JBLACK

Recommended Posts

All tractors that we are dealing with have aluminum heads - be very careful not to over tighten the spark plug - 1/4 to 1/2 turn after bottoms out to make it snug should do. It is also not a good idea to install or remove a plug on a hot engine - slightly warm - still be careful! Heli-coils are available but are not the greatest fix. Older B&S originally came with Champion J-8 spark plug. Current plug is J19LM and can help oil fouling in some cases. Torque patterns for heads are provided by engine MFG but another simple way on 9-bolt heads is to tighten every 4th bolt until you come around to the first again. Start with 1/3 of your torque spec, increase to 2/3 the 2nd time around and use the final torque on the 3rd time around.
Link to comment
Share on other sites

Correction on the spark plug tightness mentioned above - you should only need to turn about 1/8 more - not 1/4 to 1/2 as stated.
Link to comment
Share on other sites

Guest
This topic is now closed to further replies.
×
×
  • Create New...