Quote:
Originally Posted by sdbob
There is discussion in street section on pvc valves. Does anyone know why 74 SD455 had pvc in valve cover and not valley cover? My valley cover has plug. Not enough room for line?
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The SD455 engine was the only engine Pontiac installed an 80 lb. oil pump in. That pump created so much oil distribution that the PCV valve in the valley pan would suck oil into it, not very desirable. Pontiac relocated the PCV valve in the rocker arm cover to solve this issue.