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General E46 Forum
This is the place to get answers, opinions and everything you need related to your E46 (sedan, coupe, convertible and wagon) BMW!

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Old 11-17-2012, 12:54 AM   #41
TrippinBimmer
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Once coolant goes into a cylinder. They can do some Great Steam Cleaning...
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Old 11-17-2012, 01:26 PM   #42
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I would really rather pay more for a freshly rebuilt engine than just dropping in some used one with 100k and an unknown history and hoping for the best.
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Old 11-17-2012, 01:32 PM   #43
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Originally Posted by Valkyn View Post
I didn't clean them, they all look that clean tho.

I still don't understand why I wasnt getting compression on any cylinders when the head gasket looked good everywhere but by number 6 and all the other pistons looked good.

The head isnt obviously warped and looks okay.
fried the rings... But the block wont be obvious you need to check it with a edge.

Last edited by Nerdy46; 11-17-2012 at 01:33 PM.
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Old 11-19-2012, 07:59 PM   #44
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So I'm looking into getting a junkyard engine. I found a short block for a pretty good price, the VIN says its from a 99 328i so that's kosher but the part number on the block is 1436921. The part number on my block is 7502903. Are those two part numbers interchangeable?
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Old 11-21-2012, 12:21 PM   #45
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Well I bit the bullet and bought a (hopefully) good used short block and a head that had been checked out with new valve guides and a valve job. Going to buy the gasket kits and all the other pieces i need and start putting it back together.

The bottom end has 130k on it. Do you guys think it would be worth putting in new main/rod bearings and piston rings or just call it good?
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Old 11-21-2012, 12:26 PM   #46
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If it's going to all be apart, I'd definitely take the opportunity to "refresh" it all. Shouldn't cost too much with a decent machine shop.
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Old 11-21-2012, 12:55 PM   #47
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before dropping any more time and money into this 328i I would be absolutely certain this car doesn't have a cracked rear subframe. hate to say it but this yr and model is known to have this issue more than others. It's costly so be sure the car is clear or I'd sell it before putting more into it than its worth.
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