Off my rocker ! 350 GM - The 1947 - Present Chevrolet & GMC Truck Message Board Network

**Franks 72** · 09-20-2018, 07:43 AM

Anyone ever had a rocker arm come off the valve? This motor was rebuild from the ground up and ran fine all last season. It has (twice ) slipped the rocker arm off the valve. Rocker nut had not backed off and preload was correctly set (hydraulic lifters). What should I look for ? Replace the lifter? Camshaft issues? Bent valve stem? Any ideas would be greatly appreciated, Im out of them. Note ,the heads are not original GM by iron "swirl" type. Thankyou

09-20-2018, 07:43 AM	#1
Franks 72 Registered User Join Date: Mar 2013 Location: Ottawa Ontario Canada Posts: 134	Off my rocker ! 350 GM Anyone ever had a rocker arm come off the valve? This motor was rebuild from the ground up and ran fine all last season. It has (twice ) slipped the rocker arm off the valve. Rocker nut had not backed off and preload was correctly set (hydraulic lifters). What should I look for ? Replace the lifter? Camshaft issues? Bent valve stem? Any ideas would be greatly appreciated, Im out of them. Note ,the heads are not original GM by iron "swirl" type. Thankyou Attached Images

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