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-   -   Hard starting in Winter (http://www.bimmerfest.com/forums/showthread.php?t=660686)

sawtooth4x4 11-27-2012 08:03 AM

Hard starting in Winter
 
Just a question

I've noticed my 525 is hard to start in the winter. Anytime the temp drops below 30 degrees. The car is kept in a garage. But I don't usually drive it everyday. Sometimes it'll sit for 10 days without being driven.

My wife went to start it today and it took 3 times before it fired up. She had to hold her foot on the gas pedal for a few seconds before it fired up on the third attempt.

The battery seems fine. I'm sure it was probably a little low since we had not driven it in 7 days. There are not any check engine lights. I just put new spark plugs in it a month ago.

Maybe the fuel pressure bleed off? I'm not sure. Its running fine now.

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edjack 11-27-2012 09:26 AM

Fuel pressure bleed-off: develop the habit of turning the key to position 2 for several seconds before starting to build up pressure. If the problem goes away, you've solved it.

sawtooth4x4 11-27-2012 11:27 AM

yeah, i usually do that myself, i had diesel work trucks in Wyoming for years.

my wife just flicks it to start it as fast as she can. She is now edjumacated.:bigpimp:

she said she will follow my directions exactly. I somehow feel strange, she doesn't usually do this.:dunno:

Funny she didn't want to get this car at all when I found it and wanted to dump our Mercedes ML430 for it. Now she is in love with it.:thumbup:

edjack 11-27-2012 03:57 PM

Can't blame her.

poolman 11-27-2012 04:15 PM

Have you replaced the Vanos seals yet? If not, thats the first thing to do to remedy your problem.

sawtooth4x4 11-27-2012 08:35 PM

I hardly think that is the problem.

It runs like a rapped ape. Its pretty damn fast for a 525. The car is in very good shape mechanically and physically. Its been pampered

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poolman 11-28-2012 04:58 AM

You think that she runs that well--and many have thought that there wasn't a problem with their cars untill they too drank the coolaid--you wanted to know what the fix was--I just gave you what I and many others think is the first thing to do to making these cars run the way they are supposed too. The Vanos seals will bring your car back to spec--the seals are really gone with in the first 20k miles--they aren't designed to be compatable with syn oil--do you run syn oil in your car--if so your seals are toast by now and you don't even know it--your having the same problem I had with mine--I was one of the first years ago to do the job and now my car starts as soon as I hit the key in minus 0 degree weather and neve a hicup-- the car now has 240k miles and still runs great My 2 cent issued

sawtooth4x4 11-28-2012 05:35 AM

do you let your car sit for 10 days between runs?

when i do drive it everyday it fires right up. no problems.

I know what the symptoms are for VANOS failure. Mine does not have it. I'll have to look through the previous owners receipts again. But I think there were some seals replaced around 75K miles. It was pretty expensive if i remember right.

like i've said. the car has been lovingly cared for its entire life. if i remember right the previous owners receipts show close to $6000 in the last 6 years. All done at a BMW dealer in Seattle.

G-Moussa 11-28-2012 06:35 AM

Quote:

Originally Posted by poolman (Post 7218445)
You think that she runs that well--and many have thought that there wasn't a problem with their cars untill they too drank the coolaid--you wanted to know what the fix was--I just gave you what I and many others think is the first thing to do to making these cars run the way they are supposed too. The Vanos seals will bring your car back to spec--the seals are really gone with in the first 20k miles--they aren't designed to be compatable with syn oil--do you run syn oil in your car--if so your seals are toast by now and you don't even know it--your having the same problem I had with mine--I was one of the first years ago to do the job and now my car starts as soon as I hit the key in minus 0 degree weather and neve a hicup-- the car now has 240k miles and still runs great My 2 cent issued

I know i need to do this on my car, but i am not handy at all i know it is not easy job somewhere else for a 2002 540i... from what I know it is the 6's that need to get this done more then the v8's?

Fudman 11-28-2012 06:50 AM

Quote:

Originally Posted by sawtooth4x4 (Post 7218529)
do you let your car sit for 10 days between runs?

when i do drive it everyday it fires right up. no problems.

If this occurs only when the car sits for an extended period of time, replace your fuel filter. There is a check valve that is supposed to maintain fuel pressure. I believe that valve is integrated into the fuel filter on the M54. Based on the parameters of when your problem occurs, that should correct this problem. And then, maybe not. Please report back your findings.

And poolman is correct regarding the Vanos seals. The seals degrade causing the variable timing system to degrade. This is the best $100 (presuming you DIY) one can spend on the I6.

poolman 11-28-2012 08:03 AM

My advive is free--dispute if you like, just giving you the best info I know--too add--I have been around these cars a lot longer than most and I do all my own work on my car and also on freinds who have these same cars--also free of charge--
On the 540 Vanos--I know Raggie as a freind who also came out with the Vanos system for the i6 cars --I was one of the first to do the job and also after putting 15k miles on the car in less than 6 months agreed to dismanttle the Vanos in the car so that we both could inspect seals after those miles were added. The seals were like brand new and still with over 100k miles on them now the engine is just like after they were broken in from the time they were installed. With the 540 engine Raggie has just brought these new seals out--I'm sure what ever he has developed will be of the same quality of what he has produced in the past. The 540's a plauged by a number of different problems that the i6 are not. I'm not up to date on the 540's since I don't own or work on one--so all I can inform you on is that the quality of what I am familar-Besian's quality is the as good as it gets--in my case it's much better than OEM--Hope that helps
To add to the origanal post--you stated that seals may have been installed and it cost a pretty penny--bet they were installed at a BMW dealership--if so they were replaced with the same bad seals that came from the factory--the only seals that hold up are the new updated seals that come from Besian Systems


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