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Go Back   Bimmerfest - BMW Forums > BMW Model Discussions > 5 Series > E39 (1997 - 2003)

E39 (1997 - 2003)
The BMW 5-Series (E39 chassis) was introduced in the United States as a 1997 model year car and lasted until the 2004 when the E60 chassis was released. The United States saw several variations including the 525i, 528i, 530i and 540i. -- View the E39 Wiki

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  #26  
Old 11-02-2012, 07:31 AM
pshovest pshovest is offline
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Mein Auto: '10 535iA, '00 528iTM
I would check compression on #3 to confirm there's not a mechanical problem. I'd also remove distribution pipe and check/replace orings. A bad oring where dist pipe connects to #3 intake runner may create a vacuum leak that only affects that cylinder.
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  #27  
Old 11-02-2012, 10:14 AM
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idjit idjit is offline
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Lookie here: http://www.bimmerfest.com/forums/sho....php?p=6209129

I've been topping up my coolant every now and again. Quite rarely, actually... nothing major. Perhaps I have a little coolant getting into the cylinder. I'm still going to do the propane test, but is there any reason I shouldn't pick up a can of "Bars Head Gasket Block Coolant Sealer with carbon fiber" and see if it does the trick? After all, I am loosing a bit of coolant somewhere. I guess I'm kind of curious if there are negative effects of using this stuff.

Romanfishin; if you can hear me.. it's been over a year since you did your repair. How's it holding out?
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  #28  
Old 12-02-2012, 08:30 AM
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idjit idjit is offline
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Well I took the time to try a few more things. The propane test didn't make any difference, nor did swapping the injectors. I also swapped coils again as well as #3 and #4 plugs (in case my mechanic only said he replaced them). Still #3.

Fudman, you asked what plugs are in it : NGK R BKR6EQUP

I had mentioned coolant level is always down, but I'm not checking it at 20C temperature. Every time I top it up is seems to go back to about where I find it next time. I need to wait for a 20C day in winter to know for sure, I guess. I'm very hesitant to dump some "off the shelf junk" into the radiator. I still don't think this is VANOS because it's always #3 so I'm thinking it might be time for a compression check.

I checked for oil in the plug areas and nothing around #3 at all, but yes in #4 (Count from front of car towards read, correct?). Very little and it doesn't seem to be an issue. It's just around the base of the plug on the lower side.

Is there a cold start injector in this engine? If so is it in proximity to #3?
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