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1998 Chevrolet S-10 Chevy S-10 2.2 runs rough

Tiny
RANDALLDRUMMOND
  • MEMBER
  • 1998 CHEVROLET S-10
  • 2.2L
  • 4 CYL
  • 2WD
  • AUTOMATIC
I just installed a new head on this 2.2 s10 chevy. The old head was cracked. I torqued the head and rockers to spec. Engine has a hard time starting, runs really rough. Made sure that the engine was tdc. I did a compression check and the #2 cylinder has low compression and I added some oil through the 0lug hole and compression went up and back Down again. The truck had a hard time starting befor I removed the old head and now it runs worse with the new head. Any idea?
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Tuesday, November 11th, 2014 AT 3:18 PM

2 Replies

Tiny
JACOBANDNICKOLAS
  • MECHANIC
  • 109,747 POSTS
Are you sure the valves are not over tightened and causing a compression loss?
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Tuesday, November 11th, 2014 AT 8:19 PM
Tiny
JOHNNYT73
  • MECHANIC
  • 924 POSTS
Hmm. Typically if your compression goes up on a wet test then the piston rings on that cylinder are worn out or blown through.
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Wednesday, November 12th, 2014 AT 8:05 AM

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