So I got my 406 short block from the engine shop today. I plan on putting my Brodix 200IK head on tomorrow. I have a comp cam XE 284 cam in the engine its a hydrolic flat tappet. I was looking over the cam info and it it alittle confused on a breakin process. It says I have to remove one of the springs per valve if I have duel springs for breakin. at first when i looked at the heads and spring I was thinking I had duel springs, but know I'm thinking the inner spring may in fact be a "Spring Damper" The outer spring looks like a normal coil spring but the inner one spring looks more like a coil made of heavy sheet metal not a round coil. So is that a "Duel Spring" or a "Spring Damper"??? And if its just a damper coil can I leave it in for the Engine break-in???

 

That's a single spring.

If you happen to have any ARP thread lube, slathering that over the lobes and bottoms of the lifters is a great break-in aid.

I'm sure others will tell you to use GM EOS and Delovac oil. Just use a pertroleum (non-synthetic) oil, a diesel oil rated for CI-4+ would be fine, as it will have the ZDDP that helps prevent sliding wear.

 

Awesome, thanks.. I really didnt want to adj valve lash once for breakin with the inner "spring damper " removed becuase I was thinking it was "duel springs" then reinstalling them after breakin and adj all over again.. If I'm understanding you correctly, your sayn I have single spring I can leave the "spring dampers" in for breaking-in?

 

Correct.

Be sure to use a proper cam lube and proper break-in oil. Change the oil and filter soon after the break-in.

 

Crane makes a nice oil additive for proper flat tappet break in.

 

Too bad Crane has gone out of business.

 

Ah, crap...you're right. I forgot. Well, Comp sells one as well.

http://www.compperformancegroupstore...gory_Code=NEON

 

Proper long life break-in requires a few oil changes.

Run up engine with EOS for 20 minutes or so at different RPMS. This will be enough to break in the cam etc. Change the oil and filter.

Drive the car without pushing it hard for 500 miles. Change the oil and filter.

After that, drive the car however you want changing the oil every 3000 miles or less and at least once a year if you don't drive it very much.

 

So I spoke with Brodix and they told me the valve springs on my heads are for a roller cam CC 987. I called Summit and they looked up the cam I'm running XE 284 and told me to use the CC 986 spring which is a duel spring. I ordered them so it looks like I'll have to remove the inner spring for breakin then reinstall the inner spring.