Question about Cars & Trucks
I have a stock 350 sbc an i was wondering if i would need new rocker arms for this camshaft at summit part number K00172. Cam Style Hydraulic flat tappet Basic Operating RPM Range 1,800-5,200 Intake Duration at 050 inch Lift 218 Exhaust Duration at 050 inch Lift 218 Duration at 050 inch Lift 218 int./218 exh. Advertised Intake Duration 274 Advertised Exhaust Duration 274 Advertised Duration 274 int./274 exh. Intake Valve Lift with Factory Rocker Arm Ratio 0.450 in. Exhaust Valve Lift with Factory Rocker Arm Ratio 0.450 in. Valve Lift with Factory Rocker Arm Ratio 0.450 int./0.450 exh. Can anyone plz help me?
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Posted on Jan 02, 2017
You either have had the wrong valve seals installed, they are physically missing, or the valves are incorrect (too loose in the guides/stem too thin). The rocker arm seals will not contribute to your issue. If it did not have the oil smoke before you took the head off, the issue is with whatever the machine shop did. Valve seals have to fit TIGHT, or oil will go down the valve stem into the intake.
Take the head back to the machine shop & tell them to fix it. For free.
Posted on Sep 27, 2008
could be bad lifters or loose rocker arms, bad oil pump or low on oil, possible bad cam (but not likely)
first thing i would do is check your oil real low oil will cause this
if oil is fine check for oil pressure if oil pressure is low assume bad oil pump
if oil prssure looks good look for bad lifters or loose rocker arms
Posted on Mar 06, 2011
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