Excess Crankcase Pressure
I recently upgraded the 225/904 combo in my '66 Valiant with a Super Six intake and 350cfm Holley 2bbl. During initial setup and tuning, I noticed that it was smoking quite a bit, which it hadn't at all before the swap. I chalked it up to some oil or water possibly having leaked during the swap and took it for its first test run. The smoking stopped completely about 2 minutes into the drive and the car ran pretty good but clearly still needed some minor tweaking.
When I got home, I popped the hood and saw that it had sprayed oil out of the dipstick tube and I believe the distributor hole. I know the distributor o-ring needs replacing because I recently upgraded the ignition and noticed it was hard as a rock, so I put it on my list of things to buy. Upon further investigation I realized that the dipstick seemed to be missing an o-ring all together.
Regardless, obviously the engine is now experiencing excess crankcase pressure. When I did the swap, I tried to replicate the original PCV setup with the front valve cover breather attached to the air cleaner and a pcv breather at the rear of the valve cover connected to the factory location at the intake. I noticed the new PCV had a relatively stiff spring in it and since it was kind of a cheap POS, I went ahead and bought a better pcv breather. After installing it and firing it up, the car was smoking pretty bad again but stopped after going for a short test run. I got home to see it had puked oil out of the same 2 places again.
I don't have a good grommet to install the car's original pcv, so while I wait for that to show up with a new o-ring for the distributor, is there something else I should be looking at? Is it creating so much pressure at idle that it's pushing oil past the rings? Am I missing something? Any help or insight would be greatly appreciated. Thanks in advance!
I recently upgraded the 225/904 combo in my '66 Valiant with a Super Six intake and 350cfm Holley 2bbl. During initial setup and tuning, I noticed that it was smoking quite a bit, which it hadn't at all before the swap. I chalked it up to some oil or water possibly having leaked during the swap and took it for its first test run. The smoking stopped completely about 2 minutes into the drive and the car ran pretty good but clearly still needed some minor tweaking.
When I got home, I popped the hood and saw that it had sprayed oil out of the dipstick tube and I believe the distributor hole. I know the distributor o-ring needs replacing because I recently upgraded the ignition and noticed it was hard as a rock, so I put it on my list of things to buy. Upon further investigation I realized that the dipstick seemed to be missing an o-ring all together.
Regardless, obviously the engine is now experiencing excess crankcase pressure. When I did the swap, I tried to replicate the original PCV setup with the front valve cover breather attached to the air cleaner and a pcv breather at the rear of the valve cover connected to the factory location at the intake. I noticed the new PCV had a relatively stiff spring in it and since it was kind of a cheap POS, I went ahead and bought a better pcv breather. After installing it and firing it up, the car was smoking pretty bad again but stopped after going for a short test run. I got home to see it had puked oil out of the same 2 places again.
I don't have a good grommet to install the car's original pcv, so while I wait for that to show up with a new o-ring for the distributor, is there something else I should be looking at? Is it creating so much pressure at idle that it's pushing oil past the rings? Am I missing something? Any help or insight would be greatly appreciated. Thanks in advance!
