1999 mercruiser 4.3 cracked head relplace with 2000 S-10 blazer heads

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Gordon89

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i have a question if anyone knows about going from regular rockers to roller rockers or if anyone knows the pushrod lengths for an s-10 blazer compared to the 4.3 merc? we have no compression because push rods are to long
 
Scott Danforth

Scott Danforth

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Re: 1999 mercruiser 4.3 cracked head relplace with 2000 S-10 blazer heads

flat tappet and roller cams require different length pushrods. however just changing rockers going from stamped rockers to full rollers may require different length push rods. sometimes a +.100 will be required. you will have to measure them.

my first thought is you have the valves set too tight.
 
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