02-18-2019, 08:24 PM | #1 |
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PCV valve
I,m building a 265 ci engine, for a spare for the 33
I,m trying one of the Big 97 carbs,the only manifold I have that will allow the throats to be bored out to fit the larger carb throats is an alloy one from an 8ba. it has a 3/8 npt port under the carb flange that conects to both barrels,and I thought this might be a good place to plug in a PCV valve,the other end can go into the front of the manifold where the oil fill tub used to be. Any ideas what valve to use,and is it a worth wile addition. Lawrie |
02-18-2019, 08:30 PM | #2 |
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Re: PCV valve
use one for a 265/283/327 Chev. or a 289/302 ford. they are close enough in cubic inches that either should work fine.
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02-18-2019, 08:40 PM | #3 |
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Re: PCV valve
My 276 uses one from a 4.0 Jeep motor. You can get a PCV grommet to fit the hole where the road draft tube went.....Mark
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02-18-2019, 09:10 PM | #4 |
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Re: PCV valve
Pretty sure I got one that was for a toyota camry V6 Lawrie, was close to CI size. You might get lucky as suggested and find a grommet that will fill the draft tube or just drill one to suit up front , maybe create a little baffle underneath if required. I haven't tried mine yet as I went to the twin carb. Maybe winter I'll try it.. Dont forget to plug the draft.
This is timely as I was going to ask you how the BIG 97 went..
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02-19-2019, 07:55 PM | #5 |
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Re: PCV valve
I can’t find my notes with the part number but, I used one for a Nissan of similar displacement and has pipe threads on a metal body. No gasket required.
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02-20-2019, 04:30 PM | #6 |
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Re: PCV valve
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02-20-2019, 04:59 PM | #7 |
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Re: PCV valve
I use a Purol PV118C valve and a Dorman/Help 42048 grommet.
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02-20-2019, 07:12 PM | #8 |
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Re: PCV valve
Rob, I will look at the wreckers yard for one of a Commodore V6, should be easy to get.
I dont really want to block the draft tube,so I may slip a small square of shim brass under the oil pan gasket to block it off,so at least if the PCV doesnt work its and easy job to resurrect the draft tube. I was going to draw from the hole on the inlet manifold where the oil filler used to be Lawrie |
02-20-2019, 09:17 PM | #9 |
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Re: PCV valve
Yup that sounds reasonable, I was going to do something similar with a rubber bung in the pan hole.
Let us know how the carb goes.
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02-21-2019, 05:11 AM | #10 |
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Re: PCV valve
Rob ,it will be a while,I have 4 model A engines ,two v8 rear ends 2 gearboxes before I get to my spare 33 engine.
lawrie |
02-21-2019, 05:56 AM | #11 |
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Re: PCV valve
I have a couple of Fram ones that have npt threads that can screw into the manifold then you only have to run a hose to it. I used them on early sbc.
I’ll get the part number off one. |
02-21-2019, 06:10 AM | #12 |
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Re: PCV valve
FV 100 FRAM This is the one that should thread into the intake. I used them on early sbc.
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02-21-2019, 05:21 PM | #13 |
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Re: PCV valve
Thanks Lindsay,will that work if its mounted horizontal.
Lawrie |
02-22-2019, 07:53 PM | #14 |
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Re: PCV valve
I think they are 1/4 npt thread so you would have to get a 3/8”x1/4” reducer bushing and i ran them horizontally with no problems. They also made them that flow in the opposite direction.
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02-23-2019, 05:36 PM | #15 |
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Re: PCV valve
OK thanks Lawrie
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02-24-2019, 08:04 PM | #16 |
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Re: PCV valve
Pfft! you'll have that done by next weekend....
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