Originally Posted by gearhead01
Originally Posted by Dragula
Originally Posted by Hot 340
Originally Posted by Dragula
You really find that problem is associated with gen 2s only? How?


Well I would blame World more than anything, cause he has done that before, along with drilling head deck holes into the water jackets, as well as the trans holes into the water jackets, but figured I would take the high road. But this is a potential problem on any aluminum G2 Mopar block where the sleeve installer does not have a good process...I really like the newer Non-mopar dry deck blocks that have evolved to eliminate this issue. Mopar should follow.

When I worked at GM, we put the sleeves in with liquid nitrogen and a automated sleeve hammer that hammered them to the bottom...Seems the after market has not figured this out yet. It changes sound when it hits the bottom. Then we heat cycled them. Seems like a PITA process, but you don't see factory engines having that issue too often.


I have been PM/Chief Engineer on several of the machines that automatically install sleeves in aluminum blocks. Have done the nitrogen sleeve (Saturn/GM) and heating the block (Mercury Marine) method. In both, the sleeves are held down and the tooling is hammered to seat the sleeve. The amount of movement is measured to verify that on the last hit, the sleeve did not move. Yes, you can hear the difference in sound. The reason to seat is not just to prevent the water leakage problem in the Steve Morris video. If the deck is cut with a gap under the head of the sleeve, in operation, the bore in the aluminum expands expands more than the sleeve outside diameter. The sleeve will "float" and will move up and down with the piston. Eventually can damage the block and head.

John


So I was also the engineer on the L850 line in NY here...The knocker machine did indeed measure the drop and it knows they are seated. But that is not the end of it. The sleeves are left proud of the head deck by .002-.003 if I remember, and then the blocks go thru the heat cycle'er....

Now one thing only a block engineer will know is, bad sleeve boring can also push the sleeves out. If you have a dull boring insert and bore the sleeve or sleeves with it, you will put a lot of residual force into the sleeve. This can be measured if you know what the sleeve height was before you bored it. If its higher after boring, the sleeve is junk, and needs to be pulled.

After sleeve boring and measuring, the block is decked and all should be flat....BUT only if the sleeves were seated & bored correctly.....I am not so sure the after market has the process down.


'70 Cuda,...605 EFI Hemi Street Car (6.20 best pass, 1.33 60ft)
https://www.youtube.com/watch?v=WYw6RA-k5Bk (6.25 at 108.75mph from inside car)
https://www.youtube.com/watch?v=3zQEb9uxFng (6.25 at 108mph from outside car)
https://www.youtube.com/watch?v=JCvfzsC4NgM (9.9)

'66 Barracuda AWB Stretched nose Blown 440 Car in build stage

'71 Duster Drag Car 400 Low Deck 512 best 6.002 at 115.44mph
https://www.youtube.com/watch?v=Znuo3jMUXTk