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I know there has been a lot said about the C1 PCV valve options in this forum, but I have a different question. Long story short, I have a 1962 with a 1969 350 CI engine. The valve covers were replaced with the finned corvette valve covers with no intake / exit holes for PCV. There is no place to install the PCV behind the distributor since that was not needed in 1969. I want to keep the original appearance of the valve covers and was looking for options on the internet. I came across this picture, but have not seen this arrangment suggested anywhere else. This would work for my engine since this appears to have the same port for the PCV and the same Eldebrock 1406 carb. I am appealing to the experts. After looking at the picture, does this work or solve my problem? I have a vented oil filler cap and a port off the oil filler tube where I have my PCV valve now.
Last edited by ukcraig; Sep 30, 2017 at 02:05 PM.
Reason: Sp
I think it will work OK but be aware there is no oil baffle under the valve so it can sucks oil vapor and possibly cause problems with dirty spark plugs.
Why not install a set of later corvette valve covers with the baffle and use one valve cover for the pcv and the other for the breather.
I think it will work OK but be aware there is no oil baffle under the valve so it can sucks oil vapor and possibly cause problems with dirty spark plugs.
Why not install a set of later corvette valve covers with the baffle and use one valve cover for the pcv and the other for the breather.
That is what I would suggest but it seems some have success with a system as shown in the photo.
I have a 1970 350 (LT-1) shortblock in my 61. I also run the stock finned covers.
The PO (my dad) drilled the intake and created a PCV system just like shown above, except it uses a PCV valve (I would think that is need above??? I would think a back-fire would be VERY BAD!)
Inside the intake, he "rigged" a simple oil separator (a copper tube with holes drilled in it). It works well.. The only issue is that is does ingest a little oil at 'max vacuum' (deceleration with throttle closed). I can smell it when it happens. But it only uses about 1/2 Q in 3000 miles.
Also, I don't have ignition shielding... but I don't think it would fit with this setup.
I have a 1970 350 (LT-1) shortblock in my 61. I also run the stock finned covers.
The PO (my dad) drilled the intake and created a PCV system just like shown above, except it uses a PCV value (I would think that is need above??? I would think a back-fire would be VERY BAD!)
Inside the intake, he "rigged" a simple oil separator (a copper tube with holes drilled in it). It works well.. The only issue is that is does ingest a little oil at 'max vacuum' (deceleration with throttle closed). I can smell it when it happens. But it only uses about 1/2 Q in 3000 miles.
Also, I don't have ignition shielding... but I don't think it would fit with this setup.
Fred
I think they installed a grommet and placed a PCV valve in to prevent backfire from carb to intake manifold. Can it backfire in the opposite direction also? Not sure how things look underneath. Thanks again for your reply.
This is what I did on my 61 FI car. i ran the PCV off the back of the valve cover and welded an internal baffle to deal with oil injection. It works great!
[QUOTE=ukcraig;1595632921]I think they installed a grommet and placed a PCV valve in to prevent backfire from carb to intake manifold. Can it backfire in the opposite direction also? Not sure how things look underneath. Thanks again.
I think they installed a grommet and placed a PCV valve in to prevent backfire from carb to intake manifold. Can it backfire in the opposite direction also? Not sure how things look underneath. Thanks again.
So what's underneath this bolt
That bolt/plug goes to the intake runner and is an auxiliary vacuum source for say, a power brake booster.
I think they installed a grommet and placed a PCV valve in to prevent backfire from carb to intake manifold. Can it backfire in the opposite direction also? Not sure how things look underneath. Thanks again.
So what's underneath this bolt
That's on an intake runner, so it's manifold vacuum. You need a spot that accesses the "valley below". I had some pictures of baffles others had made for using the PCV there. I'll see if I can find them.
Here's a post also discussing PCV options:
I guess many here are not aware of this option of you want to run original type valve covers.
Holes are located on the intake manifold side of the valve covers. This location corresponds to the baffles cast into the interior of the covers.
On the driver's side, the hole is near the front. On the passenger's side, the hole is near the rear/firewall.
A little pricey but simple to do without a bunch of work to make the other options work.
That's exactly what I did on my '69 350. Had a Edelbrock 2101 manifold machined for a PCV rubber baffle grommet and the front machined for the fill tube. I also made an aluminum baffle just in case the baffle grommet wasn't enough. Was able to use my finned valve covers and with the ignition shielding on it's hard to see the PCV hose. Looks and runs great!
I guess many here are not aware of this option of you want to run original type valve covers.
Holes are located on the intake manifold side of the valve covers. This location corresponds to the baffles cast into the interior of the covers.
On the driver's side, the hole is near the front. On the passenger's side, the hole is near the rear/firewall.
A little pricey but simple to do without a bunch of work to make the other options work.
The valve covers here are about 3/4 inch taller than the stock corvette valve covers I have now. I really liked the design, but they would not clear my coolant overflow tank over the drivers side cover. Wish I could have used this option.
PCV question - different take
