This is from Novak
CK5
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Power Tour registration opened Wednesday. Platinum and Gold are sold out already. I got Jr and myself signed up tonight.
We’re registered
Cool. How much of it are you doing?
The only reason for the second tone ring is for 4x4 so the factory computer doesn't go I to limp mode
Whole thing
Good deal. My son will be driving his Corvette. What are you taking?
Front sensor is input speed . 2nd sensor is output speed and speedo . Be it 2wd in trans or tcase for 4wd use its needed . Computer looks for slipping so it can try and save its self .
I’m glad your son will be able to attend, I wasn’t sure if he would be home or not
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He should be. We are planning on it.
OK engine gurus.
I have never pressurized a cylinder to pull valve springs. My mind says I should not be hearing air escape into the bottom of the block. Please tell me I am wrong.
I have never pressurized a cylinder to pull valve springs. My mind says I should not be hearing air escape into the bottom of the block. Please tell me I am wrong.
Depends on how much pressure you are using. But air will escape from some where. This why the leak down tools have a gauge to see if the leak is with in spec.
You should be able to swap springs with 35-50 psi
You should be able to swap springs with 35-50 psi
I have 40psi going in. Holds the valve, but I can hear air in the valley.
yes it is leaking past the rings. Normal for an engine in good condition. The amount of air leaking would condemn the ring or not. Since 40 psi is holding the valves closed while you springs I feel you are in good enough condition, no need to worry.
I make sure the piston is at TDC on the off chance I loose air. That way the valve can’t drop all the way into the cylinder.
All of the cylinders are doing it. Sound about the same.
Had to put clamps on the ring gear as the pressure tried to push the piston down. All of the spark plugs are out.
I should have posted this yesterday. 4 pumps on each. Dead cold, 50*. 
Oil was 4 quarts over full when I checked prior to doing anything. Pumped some out after pulling the distributor. This is what came out first. About 1/2 cup. The dirt was already in the tub.
Under tha valve covers.
Somedody has been in here in the past. Blue tow residue and finger wipes.
What I was trying to get a look at initially.
View attachment PXL_20240113_214852683.TS.mp4
The 8 valves that I have checked have immeasurable slop in the guides. So that is good.
This is in the intake manifold. I would have said this is no big deal. Tiny pit of blowby. Normal on a BBC in my book.
Oil was 4 quarts over full when I checked prior to doing anything. Pumped some out after pulling the distributor. This is what came out first. About 1/2 cup. The dirt was already in the tub.
Under tha valve covers.
Somedody has been in here in the past. Blue tow residue and finger wipes.
What I was trying to get a look at initially.
View attachment PXL_20240113_214852683.TS.mp4
The 8 valves that I have checked have immeasurable slop in the guides. So that is good.
This is in the intake manifold. I would have said this is no big deal. Tiny pit of blowby. Normal on a BBC in my book.
Which is also a telling sign if 40 psi makes it rotate then the seal is pretty good. The leak down test uses much less pressure to attempt to keep the engine at tdc with holding it in some fashion
I played with it a little more. I just ran the piston up enough to keep the valve from dropping. If I pressurize it to 40PSI and put a cheater bar on the balancer bolt, I rotate the crank it to where can feel the compression start. Then compress to where it rolls off of TDC. 5 * or so on either side of TDC, through TDC, the leak is gone. I am leaving the heads on it.
Did it sit outside where it got water in it? I’ve never seen pushrods rusted like that unless moisture got in….and that oil is 
