What seals that cover's upper and lower halves where they meet each other?
Blue RTV.
No formal gasket at all for the front two pieces where they attach to the "block ring", as they called it. Instructions say to use the silicone RTV and carefully form them.
After a few minutes I did wipe the center line of excessive RTV, therefore you don't really see it. On the outter edge you can see the excess RTV which I have not
wiped off
Articles indicate that this cover can be a source of oil leaks, but that careful "gasket" forming can prevent that.
One issue I had was that I had previously bought the "thrust button" from comp cams, and when I first installed it the cover would not close - oops
after a few words, I went back to the instructions (very brief, no pictures to show what the names mean) and then to the packet of "parts". Low and behold, there was an included thrust button and it was shorter than what I had purchased prior - oh oh, there are different lengths? - the one in the packet fit and it came with 4 washer shims that fit under the button. So we experimented with different combinations of the shims until we got .005 inches which is in the limits of .001 and .005. One does need a dial meter, which I had picked up a few months ago.
I like the feel and the look of the cover, it works, but the instructions were brief and no diagrams or pictures. I spent some time re-reading it and experimenting with parts to get the mental model of how to put it together with the thrust, etc.
The parts packets comes with new screws to replace any on the future water pump. These new screws are a low head and will help give space between the cover and the long pump back face.
As I mentioned, I also got the oil pan put on. I took my time on this, with good adhesive on the gasket, black RTV silicone in the corners, allowed it to dry better, and slowly tightened bolts down to 12 ft-lbs (144 inch-lbs) on a 3/8 drive small torque wrench. SO MUCH better than the 1./2 drive BIG torque wrench.
The thrust measure hole is just above the crank shaft, with a button screw. After measuring, I applied some RTV to the threads and screwed it in until it bottomed out.
The parts kit comes with two different height marks, one for a small harmonic balancers and one for a larger balancer (I have an 8" one). They can be adjusted with a 10 degree range
I believe
Price: $242 with free shipping from Amazon, was the cheapest I found for this part
The cam, the cover, the button, etc are all COMP CAMs products, which gave me some assurance it would work AND a phone number to call
for advice if I ran into problems - which I didn't use.
It has the strength to handle the thrust button pusing on it and looks beefer than the original cover.
dougbert