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oil in carby

Old Sep 13, 2023 | 07:15 PM
  #1  
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oil in carby

got a 383 with roller rockers

the engine guy put chinese rocker covers on this engine and i dont thing the baffles are in because of clearance on the rocker arms.

Oil is getting into the Pcv pipe and getting into the carby..

i wont spend 2 hours explaining my scenario.

What Valve covers DO GM MAKE that will
1 clear the rocker arms

2 have baffles in the covers where the breather oil filler is and under the PCV valve.

Simple

NO MORE CHINESE chrome parts please.
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Old Sep 13, 2023 | 07:20 PM
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Car: 1989 IROC-Z
Engine: L98 350 TPI
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Axle/Gears: BW 9 Bolt / 2.77 Posi
Re: oil in carby

Get a stock set and cut things off until they fit.
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Old Sep 13, 2023 | 07:34 PM
  #3  
aussiesteve's Avatar
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From: Sydney Australia
Car: 1982 z/28 Right hand drive
Engine: 377 AFR195 750DP Solid cam 10.25:1
Transmission: TH/350 3200 stall spohn conversion
Axle/Gears: 10 bolt 3.42:1 Eaton Trutrac.
Re: oil in carby

THATS the probem people cut bits out and the baffles removed for clearance,, oil in carby via pcv HOSE.
AT 6300RPM AT 1/4 MILE THE CAR IS CLOUDED IN sMOKE
THANK YOU
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Old Sep 13, 2023 | 10:04 PM
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Re: oil in carby

Catch can?
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Old Sep 14, 2023 | 07:51 PM
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Car: 87 IROC L98
Engine: 588 Alcohol BBC
Transmission: Powerglide
Axle/Gears: Ford 9"/31 spline spool/4.86
Re: oil in carby

Open breathers with no PCV sucking oil back into the intake.
Or, open breathers with tubes going into a catch can.
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Old Sep 15, 2023 | 10:53 AM
  #6  
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Re: oil in carby

I am running stock style they clear my 1.6 RRs no issues and have baffles
https://www.summitracing.com/parts/mrg-9800bp
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Old Sep 19, 2023 | 06:26 PM
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Re: oil in carby

Typically, you should be able to bend the baffles a little to clear, but sounds like they removed them.

They make baffled grommets - under $5 usd if you can find them locally. They work fairly well and SHOULD clear the rockers. I've used these before on cheap stamped steal covers without baffles. Eventually the foam will need to be taken out and cleaned - sooner or later, depends on your engine. With the two pack, you could swap over once the foam gets oil soaked, clean and repeat - or get another set of valve covers. However, if the rockers are not "narrow body" you still may need to bend the baffles with most "baffled" valve covers you get.
https://www.jegs.com/i/RPC/707/R9359X/10002/-1
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Old Sep 20, 2023 | 04:31 PM
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Re: oil in carby

Two of my experiences come to mind.
The first was with Comp Pro Magnum full roller rockers and OEM centre bolt valve covers. The only trimming involved was along the cross brace which supports the bolt tube. Minimum needed. Maybe 1/16" and a bit. GM's baffles remained intact.
The second was with the GM licensed ProForm diecast covers
No bracing to trim but the baffle had some slight interference with the rocker trunnion. A little trimming and the removal of a piece about 3/8" square was required. The guts of the baffle was left undisturbed.

FWIW, that last engine had a lot of blowby and I incorporated a catch can between the PCV valve and the intake manifold.
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