stage one of 3.7 dissmantle

[aussie]

first check was compression 175---150--155-- 145 may be broken rings or leakey valves . ok guys the head is off 7 tips of the valves r badly worn no sighns of why the push rods bent no marks on pistons . checked top off pistons there 30 plus so i t has been rebuilt and the exhaust manifold is not old . the pistons have a dish in them like a bath tub any one no wether they run flat tops or them. seen some used pistons on ebay of a 3.7 and they looked flat as far as the head goes the valves look too big for a engine that only turns to 4500 rpm and the exhaust ports r so restricted u could gain some horse power by porting them what were the thinking leaving those big humps in there . so next stage is to get the block out may be a few weeks till i do it