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#11
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Quote:
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2000 e39 M5 Titanium on Black 2006 e53 M54 Titanium on Black 2007 e83 Black on Black Sport pkg 2004 Avalanche 2500 lifted 4.88 gears 1994 jacked up Jeep 1987 GMC lifted short bed on tons |
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#12
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Physical fitment wise the S52 will bolt in identically to the M54. Use the engine mount arms, oil pan, etc - everything from the M54 on the S52 including all accessories. It all bolts up, the engine will then bolt up to the chassis.
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#13
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I am betting you have a burnt or chipped valve....I have seen a few on M54's...although that usually results in zero compression.
Oil gets in through the CCV over time and eventually burns up the exhaust valve. At least that is the theory... Regardless, if it is something in the cylinder head, I would slap a good used head on there and put it back in service. The M54-equipped E53 X5 takes a cylinder head or head gasket pretty well. The car stays on its wheels the whole time, and you have good access.
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'03 530i - manual swapped - 425k miles '06 325Cic auto 115k '05 X5 3.0 auto 158k '99 E39 528i 5-speed 130k |
#14
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Alright, after some marvel mystery oil in cylinder 6 soaking overnight, no change. Pretty much confirmed the engine is toast. I never saw it coming.. no clue what happened. No warning.
Compression numbers as of yesterday... Cylinder #1: 168psi Cylinder #2: 145psi Cylinder #3: 147psi Cylinder #4: 100psi Cylinder #5: 168psi Cylinder #6: 12psi
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2000 e39 M5 Titanium on Black 2006 e53 M54 Titanium on Black 2007 e83 Black on Black Sport pkg 2004 Avalanche 2500 lifted 4.88 gears 1994 jacked up Jeep 1987 GMC lifted short bed on tons |
#15
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So pull the head off.
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'03 530i - manual swapped - 425k miles '06 325Cic auto 115k '05 X5 3.0 auto 158k '99 E39 528i 5-speed 130k |
#16
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Three different age coil packs? The spark plugs show some serious ceramic burn through. I think most engines don't get enough rear cylinder cooling. Ram's diesels are notorious for it. Same I6 design.
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'06 X5 3.0i - bought @143,123 miles (12/26/20) |
#17
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On the M52TU and M54 the cold coolant flows to the rear of the engine first, then flows forwards to cool the other cylinders. 6 receives the coldest coolant
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#18
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Have you checked the DISA valve for missing pin?
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1998 E39 528i 5sp MT 2006 E53 X5 3.0 6sp MT |
#19
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Yes I have replaced a couple of the coil packs over the years of ownership as needed. But never replaced all. My conclusion was, they either work or they don't. Cylinders 1-5 plugs look very similar, #6 is darker. 1-6 from left to right.
I have not checked the DISA valve for a missing pin. Can you elaborate?
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2000 e39 M5 Titanium on Black 2006 e53 M54 Titanium on Black 2007 e83 Black on Black Sport pkg 2004 Avalanche 2500 lifted 4.88 gears 1994 jacked up Jeep 1987 GMC lifted short bed on tons |
#20
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'06 X5 3.0i - bought @143,123 miles (12/26/20) |
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