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#1
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BMW 4.4i engine an Interference Engine or Not
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#2
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Everything I have shows it to be an interference engine.
Do not turn the crankshaft with the timing chains off.
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Just BMW's - All cars and trucks was two pages long 1994 318is 1997 528i 2000 323i 2001 X5 3.0 auto 2005 X5 3.0 auto 2011 535xi auto 2013 X5 xdrive35 Turbo More are at my website Aftermarket E53 Radio Install |
#3
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All BMW engines (that I have experience with) going back to the early 80's are interference engines. I'm not sure about stuff older than the m10 engines. You will bend valves if you spin the crank with the valve train out of time.
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2005 X5 4.4i Build 04/05 Maintenance/Build Log Nav, Pano, Sport (Purchased 06/14 w/ 109,000 miles) (Sold 8/15 w/121,000 miles) 2006 X5 4.8is Build 11/05 Maintenance/Build Log Nav, DSP, Pano, Running Boards, OEM Tow Hitch, Cold Weather Pckg (Purchased 08/15 w/ 90,500 miles) 2010 X5 35d Build 02/10 Nav, HiFi, 6 DVD, Sports Pckg, Cold Weather Pckg, HUD, CAS, Running Boards, Leather Dash, PDC, Pano (Purchased 03/17 w/ 136,120 miles) |
#4
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Quote:
I can not think of a single non-interference BMW engine, although I'm mostly familiar with their 6 cylinder offerings. Maybe some older 4 cyls were non-interference M62 is definitely interference though |
#5
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Hey Spanker, Bentley Service Manual States in a Caution box as follows, "The Valves may be bent by contact with the piston crown...Yep it's an interference engine.
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#6
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Thanks all who contributed. My response is quite belated. But, I've kinda shelved the project for a while. After removing engine.....I have confirmed for myself....indeed this is an interference engine with ZERO doubt.
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