How important is lifter bore clearance...
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Joined: Oct 2003
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From: Tri-Cities, TN
How important is lifter bore clearance... Mark Harrell
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Join Date: Dec 1999
Location: San Antonio, TX
Posts: 2,359
Lifter bore clearance!: I chased my poor oiling problem (at the rockers) on a freshly-machined/built 331 for months. One day I finally stumbled on a post about too much lifter-bore/lifter clearance, and I found a stock replacement lifter from Comp Cams that advertized it was .001" larger. I ordered ONE – put it in the “front of the line” of the oil galley feed, and lo and behold, angelic music rang in my ears! Probably twice the amount of oil came-up through the pushrod compared to the stock lifter. Apparently the lifter-bore hone at the machine shop took-off just enough. Ordered the entire set of +.001 lifters… problem solved.
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86 GT - Original Owner: Currently down with some front-end damage
86 GT Convertible - Mostly Stock 5-speed
Registered User
Trader Feedback: (8)
Join Date: Dec 1999
Location: San Antonio, TX
Posts: 2,359
Lifter bore clearance!: I chased my poor oiling problem (at the rockers) on a freshly-machined/built 331 for months. One day I finally stumbled on a post about too much lifter-bore/lifter clearance, and I found a stock replacement lifter from Comp Cams that advertized it was .001" larger. I ordered ONE – put it in the “front of the line” of the oil galley feed, and lo and behold, angelic music rang in my ears! Probably twice the amount of oil came-up through the pushrod compared to the stock lifter. Apparently the lifter-bore hone at the machine shop took-off just enough. Ordered the entire set of +.001 lifters… problem solved.
__________________
86 GT - Original Owner: Currently down with some front-end damage
86 GT Convertible - Mostly Stock 5-speed
