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#29141 08/06/2003 2:38 AM | Joined: May 2003 Posts: 9 Junior Member | | Junior Member Joined: May 2003 Posts: 9 | I can't seem to figure out whats wrong with my 350, a few weeks ago I had camel humps put on and since it's just not right. It has more power but it's running rough. At first I thought maybe dentonation with the 10-1 CR but I don't think it's that with dished pistons,12 inital timing didn't really help. The idle is rough and runs more than "lumps" like it used to. Here's the specs,
350 .060 bore
10-1 aprox CR
2.02/1.60 64cc heads 1.6 roller tip
298/300 d 500/550 cam with the 1.6 roller
stock 10-10 crank, rods
victor jr intake, 750 q jet
stock HEI
3000 stall
let me know if you need any more info
the engine has 4300 miles since rebuild, I've checked for vac leaks and the plugs and everything seems fine, but I'm not positive, I usted the carb but no luck, the engine also has a weird metalic clutter sound to it now also. The valve to piston clearace was good I was told.
crossed wires?
header gasket leak?
valves out adjustment?
the truck ran great before putting the heads on
Any ideas, anything at all would be great, thanks.
__________________
1972 Chevy Cheyenne
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#29142 08/06/2003 2:52 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | I am almost betting on valve contact with the piston or cylinder wall. With the 1.6 rockers and the high lift cam you are cutting things REAL close.
I am trying to remember if the top edge of the cylinder has to be notched with the big valve/cam-lift and long-rockers
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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#29143 08/06/2003 7:58 AM | Joined: Feb 2000 Posts: 5,203 'Bolter | | 'Bolter Joined: Feb 2000 Posts: 5,203 | You might want to do a engine running valve adjustment. Start by backing each one off one at a time till it clatters real good. You will know when you are there. Once you are satified its loose and has clearance, slowly tighten it back down till it quits clattering. Then go 1/2 turn more. Do this on all 16 and see if the noise goes away and it idles better. It helps to slow the idle way down before starting this and pull one rocker cover at a time to keep the oil mess down. Joe | | |
#29144 08/06/2003 9:26 AM | Joined: Feb 2001 Posts: 1,897 Member | | Member Joined: Feb 2001 Posts: 1,897 | Only do the adjustment like Joe said if you have hydraulic lifters. If you have solid lifters do not do it that way. I am guessing that you have hydraulic lifters as it was a stock engine to begin with.(just a guess)
There is enough good in the worst of us and enough bad in the best of us that it does not behoove any of us to criticize the rest of us.
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Be yourself. If you are ever lost, It will be much easier to find yourself if you know who you are!
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