Mamo 220s in 383 stroker
it's easy...just pack the pan with a couple shop towels. I never dropped the bolt once and I have large hands but I have good hand dexterity...Just take your time. It definitely is a dumb *** design. The engineer must of thought LS oil pumps would never need to be removed in the vehicle.
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To get the pan loose I had to jack up the motor and it took me an hour or more to jockey the engine back to line up on the mounts. A big pipe finally helped plus I loosened the bottom of them so I could move the top bolt around a little. If barely fits in the motor ears so it had to get lined up perfect.
I was short a bolt for the timing cover even though I bagged everything up as I went. I found an exact one in some junk bolts on the bench and then of course found the original one when I put that one in.
I put the ATI balancer in the oven at 200* for a while. With a little anti-seize on the crank it went on fairly easily. I had a nice tool for it that a friend made. I cleaned out the head bolt holes and put the lifters, gaskets and finally the head on. Felt good getting to a point of rebuild.
I took a picture of that and also the difference in a "normal" Cometic head gasket for a 5.7 and a larger 4.160". He recommends 4.135 minimum and the Cometics I could find in a .036" thickness were 4.160". I took some pictures of that too. I've read the debate of size for the 5.7 bu I'll take the slight step and headroom for flow off the valve instead of a hot glowing edge.
Magnificant Mounted Mamo Motorsports Modified Motor-heads
Cometic 3.910 gaskets overhang the combustion chamber.
Cometic 4.160"
Last edited by svede1212; Oct 16, 2015 at 09:56 AM.
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What an ordeal. I'm glad you got that bolt out of there and the pan back on. Also very glad you found the original bolt that was missing, because as tuckin22 said, worrying about where it might be is terrifying.
But damn, those heads be pretty.
But damn, those heads be pretty.
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I'm fussing on the push rod length and rocker shimming right now. So far it looks like a .060"-ish shim is right but I can't make up my mind and the push rod length then changes and I adjust that and then. . . . it's back and forth.
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It sucks that you have to go through all that tedious process, just to have to wait for the pushrods to show up after you finally know what length to order.
But I'm jealous of you, despite the hassle and setbacks, you are still mounting magnificent mamo-fied mamo motorsports motor-heads on your engine... And that's F'ing awesome.
But I'm jealous of you, despite the hassle and setbacks, you are still mounting magnificent mamo-fied mamo motorsports motor-heads on your engine... And that's F'ing awesome.
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OK. I've had those rockers on and off so many times. Only lost a pedestal once 
. I tried several different shim stacks several times each and I don't know how many times a different push rod length. I seemed to get my best pattern with a .060" shim even though I've read a couple that used .120". Caliper measured checker rod tip to tip at zero lash was 7.240" so I think I need a 7.275" for a .035" pre-load on 72532 lifters if ordering Manton 11/32" 0.120" wall. I'm a little confused though as when I measured my Comp rods that I had they were about .015" longer than marked and Manton says theirs is actual..
. I tried several different shim stacks several times each and I don't know how many times a different push rod length. I seemed to get my best pattern with a .060" shim even though I've read a couple that used .120". Caliper measured checker rod tip to tip at zero lash was 7.240" so I think I need a 7.275" for a .035" pre-load on 72532 lifters if ordering Manton 11/32" 0.120" wall. I'm a little confused though as when I measured my Comp rods that I had they were about .015" longer than marked and Manton says theirs is actual.. Last edited by svede1212; Oct 14, 2015 at 04:34 PM.
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From: CHristchurch New Zealand
Yea i know, i've had a complete 402 LS2 Mamo engine sitting in bits for the last year ready for the machine shop, everything spec'd and sent by the man himself, YT ultralites, manton push rods, johnson lifters, ported fast 102 and a hand finished set of AFR 230's with all the fruit just before he left to do his own gig, wish they had the Mamo Motorsport on the front of them though lol, i really should pull finger and get it done.
That's exactly what my wipe pattern looked like at .060" with the YT's and Mamo220's. Then I added another .060" for .120" total and it got even more centered and narrow. At least give it a try. It may not work for you but with so much in the motor why not try a couple more washers.
I ordered exactly what I measured with my calipers through Manton and got exactly what I needed. Try to not over think it. Manton knows what they are doing. :-)
I ordered exactly what I measured with my calipers through Manton and got exactly what I needed. Try to not over think it. Manton knows what they are doing. :-)
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Most pushrods are .015 to .020 longer than they are marked. Manton makes them the size you measure with the calipers. So if you had a measurement of 7.415 with the calipers you would order a 7.4 pushrod from comp but a 7.415 from manton.
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That's exactly what my wipe pattern looked like at .060" with the YT's and Mamo220's. Then I added another .060" for .120" total and it got even more centered and narrow. At least give it a try. It may not work for you but with so much in the motor why not try a couple more washers.
I ordered exactly what I measured with my calipers through Manton and got exactly what I needed. Try to not over think it. Manton knows what they are doing. :-)
I ordered exactly what I measured with my calipers through Manton and got exactly what I needed. Try to not over think it. Manton knows what they are doing. :-)
.120"
The other picture in the post above from yesterday at .060" is with black ARP grease which kind of smeared out more. I have a pic of .060" with a marking pen too but was a little harder to see.
.060"
i'd say use a checker spring if you can but when Darth did his and spoke to tony he said you will get close enough to full lift with the normal spring on it to where it wont matter