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#21
08-25-2012, 02:09 PM
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#22
08-25-2012, 03:54 PM
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Yea I agree. Before you pull the motor. Do a leakdown test after a compression test. See what the damage is like.
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2006 4.8is, Black on White. SOLD Sniff Sniff. 2017 F85 x5m, Black on Red. BEAST MODE "The older we grow the greater becomes our wonder at how much ignorance one can contain without bursting one's clothes." - Mark Twain Unlock OBC post 5
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#23
08-28-2012, 12:05 AM
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the leakdown test is no good, some valves are bent...
i did some cross reference between TUB44 and B46, it seems a few parts are the same... so, maybe, instead of considering downgrading, i just get a used TUB44 engine for donor parts?... I have couple pieces of engine walls busted broken in small chunks of metal... i still will need fresh gaskets and maybe a few 4.6 specific parts... stilll looking into it...
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#24
08-28-2012, 01:20 AM
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Quote:
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#25
08-28-2012, 02:46 AM
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Rebuilt heads won't help with a broken block.
You may want to speak with VAC Motorsports. I know they can sleeve the blocks. Maybe sleeve a 4.4 block to the 4.6 bore and rebuild from there? You may check with these guys http://http://www.data.bmrparts.com/bmwparts/BMW_ENGINE_ASSEMBLY/BMW_11007515721_4.6L_used_long_block.html
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A common mistake that people make when trying to design something completely foolproof is to underestimate the ingenuity of complete fools. -Douglas Adams  2003 X5 4.6is Estoril Blue 2005 Infiniti G35X 1972 Datsun 240Z 1991 Isuzu Impulse XS Sold 1972 Fiat 850 Spyder Donated 1972 Datsun 240Z Sold 1972 Datsun 510 Sold 
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#26
08-28-2012, 09:55 AM
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While I don't have the 4.6, I do have the 4.4 and was wondering if you were getting the chain slap with cold start ups? If so, how often? In hindsight, should the guides be replaced when we start hearing the brief slap in the mornings?
I've changed the tensioner but it's still happening. 2002 4.4is 132k miles
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#27
08-28-2012, 10:28 AM
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Quote:
The block itself is not broken (at least, it does not seem to be a problem at this moment), just couple covers, and they seem to be interchangeable...
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#28
08-28-2012, 10:57 AM
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Sent via Telegraph Wires using my Morse Key. 2021 X5 xDrive40i 2015 X5 xDrive35i MSport (Traded) 2013 X5 xDrive35i
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#29
08-28-2012, 03:48 PM
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You sure its bent the valves?? Mine did the same thing at 70mph and I had to drive it about 2 miles with a hell breaking loose under the bonnet to get to a pull over. Cam chain bits were not happy, but no damage anywhere else (at that time anyway). I would pull it out and strip it first. Its got to come out no matter what you decide to do, and taking it apart is cheap. If you do it yourself putting it together should cost no more than 3000 of your American dollars. You might get away with a cam cover, chain and guides
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#30
09-12-2012, 12:25 PM
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Yo Terminator,
What's going on with your motor? Hope you are getting more good news than bad.
__________________
2002 X5 4.6is - Titanium Silver / Black Alcantara - Dinan Stage 2 - Bilstein/Eibach - Brembo BBK ----SOLD--- 1993 318i - Brilliantrot / Tan - bone stock daily driver
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