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Original Message
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| Rocker Shafts...How many holes? |
| By John - 07/17/2002 9:17:13 PM; IP 142.177.97.195 |
| A few years ago I purchased some Harland Sharpe rocker shafts from Summitt. They had two holes per rocker location...one underneath and one on top. Sometime more recently I noticed that Summitt now advertises 1-hole HS rocker shafts. Both before and after my engine rebuild I had gray smoke from the exhaust under reasonably hard acceleration, but not when I started the engine nor when I cruise along. If I accelerate a second time shortly (20 seconds or so) again, it doesn't smoke. If I cruise for a little bit longer and then accelerate a third time, it leaves quite a cloud back there. I have no water leaks at all that I can see and I presume this smoke is from the valve guides and the heads flooding slightly with oil. I have restrictors in the heads but I am wondering about all these oil holes in the rocker shafts. One of the previous letters in this forum told of an engine with the rocker shafts installed upside down that smoked similairly to mine. When this fellow corrected the problem, his engine stopped smoking. I can sort of see why. The rockers press upwards against the shaft which means maximum clearance between the top of the rocker shaft and the rockers and hence more oil flow. Can anybody add their two cents to this before I spend more money buying different shafts? |
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This thread, so far...
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