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Build thread/running log of my E28? Guess I can do eet.


Brian.

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Got the engine torn down a bit more yesterday before work. Coming along slowly, but I got all the time in the world.

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I also cut off the rusted rear muffler because I was afraid it'd fall off on the highway an explode into a rust bomb. This is what was left:

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This is also the car I picked up off Jawa for a good price. Yay winter beater!

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Did a little work on the daily, the rear muffler was a bit rotted out, decided to remove it, didn't realize just how bad it was...:
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Started tearing the motor down to a bare block to get it ready for hot tanking, primer, and paint.

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This motor was rusty an crusty on the outside. But a bit of wire wheel action, and a bit of sand blasting will get this thing looking minty as ever!

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Cylinder walls had no scoring, no ridging, so that's good!

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Pistons looked pretty good for the miles as well!

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The crank looks to be nice as well. It has no scoring, no scratches, etc. So I'm all around pretty happy!

An this is how I left it. No sleep with a work in a few hours, I needed some rest!
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How many miles were on it?  Just curious, the M20 in the picture had somewhere over 280k and still had no ridge , only about .003 wear towards the bottom.  The shop I had inspect, tank, and hone it was very impressed, he said a 350 chevy will have a big ridge at 150k lol.  And the m52 I did had 215k and the crosshatching was still there.  I don't have a good pic of the M20 but this is the M52.  And both of these had overheated from a cracked head.

 

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Its not a bad design IMO.  Manifold inlet is centered for best chance of equal cylinder filling, Long runner length to improve low+midrange power (turbo can take care of top end power ), Equal length (if not very close to equal length) runners. Im a fan of flipping the TB position though

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