I have a 1963 impala with a 350 small block in it. I wanted to make the motor look stock so what I did was buy some stock 283 valve covers and stock air filter housing to make it look up to date with the car. The only porblem is the 1963 impala 283 valve covers did'nt have the pcv valve hole. Does any one know what I can do with that pcv valve. Do I need it or can I put it some where else. Thanks!
PCV VALVE ON 350 ENGINE.
- Thread starter slicksheezzy
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Been a long time since I had my '63 and '64 Impalas, so I'm stretching my feeble memory. Older manifolds had an oil fill tube with a breather cap at the front of the manifold. At the rear of the manifold was a a vent tube, routed downward around the bellhousing. I think the term was "road draft tube". In '64, if memory serves, a PCV valve replaced the vent hose in the rear port. Our first emission control! Possibly you might find a better description in one of the old Corvette forums.
Bill
Bill
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billyjack said:
Yup that's right.
I think your best bet is to just get a set of valve covers with the PCV hole. Might not look 100% stock. But then again 90% of the people out there won't notice it anyway.
20 years ago we tried a "negative pressure" crankcase system on our injected, wet-sump sprint car motor. According to Chevy drag race legend Bill"Grumpy" Jenkins, crankcase vacuum was worth a few ponies. We welded threaded bungs in the header collectors, installed air emission check valves, and ran hoses to two spouts on the oil fill tube at the front of the manifold. Worked too well! When we had to brake hard entering a corner, the oil would move to the front of the engine, get sucked in the headers, and we'd get black flagged for all the smoke. We had to go back to the conventional setup with a common tube between both valve covers and a pair of K&N breather filters. If you don't try, you'll never know. After all, if they had given up after WD-39, we'd never have WD-40. Seriously, I do like the idea of clean, unblemished valve covers. I'd have to give some serious consideration to drilling the manifold for an intake vent and PCV grommet, as long as there's an adequate baffle under the PCV valve.
Bill
Bill
I did this in a '67 El Camino with a 305. I used the 283 "Chevrolet" script valve covers and the stock style intake with the fill tube at the front. The filler tube cap was vented. Small journal engines (pre '68) have a hole at the rear of the block for the draft tube and a std valve cover PCV grommet fits perfectly. On your 350 that hole is missing. I solved this by using a screw-in style PCV like my '66 327 used. They were normally screwed into a bung in the filler tube (this may be California only). I drilled and tapped through the top of the intake directly into the lifter valley area - not into an intake runner. The hole was just forward of the distributor. If I remember correctly it was 3/8" pipe thread. I ran the hose to a vacuum source at the rear of the carb. At first glance it looked completely stock.
My '66 El Camino's 327 had that. It had a full A.I.R system too. That's why I thought it was Cali model. The '67 didn't have it though and it was correct for a '67 283 according to casting numbers.
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