alboy

I wanted to check the little blue fasteners that hold the lines from vibration.Anyone know what size wrench,also what size wrench to change the lines,thx.

carl48

10 mm and 19 mm. get a # 4 injector line and carry with you. cummins part # is 4988808 it will be $22 to $28 it is made of different metal and the isolator has a torx screw

BroncoAZ

I walked into a Cummins commercial shop in Odessa, TX a few month ago and asked for the #4 fuel line. One of the counter guys was telling me he needed the engine serial number to make sure I got the right one. The other counter guy walked away and came back with the 4988808 box in his hand. I think it was $24.50 out the door.

bansh-eman

I need to go buy my self 2 spare wrenches to toss inmy truck. I hav the #4 lin but no tools like a dummy. What size torx is it?

cdennyb

ok, call me stupid, why the no#4 line? Is it prone to leaks?

bansh-eman

I read that it has somethng to do with the vibration causing the isolator to break. I think it covered why only #4 but I cant recall off the top of my head....

alboy

Went and got the 10mm and 19mm flat wrenches.The 19mm is correct,could not see where the 10mm fit??On my 06 the fastener took a 8mm socket,no torx head,a flat wrench is needed as no room to use a ratchet.THX

bansh-eman

I need to go do all that my self. I just always forget!