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Old 09-07-2014, 06:26 AM   #1
uncleruin
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N42 valve seal replacement

BMW 3 Series 318i E46 manual petrol , 2003, (N42 engine 1995cc)
Hi all, I am new to all these forums and such like, and to my first BMW car, so I have a lot to learn, and this is my first ever posting.
The valve stem rubber seals on this car need replacing, what I need to know is do I have to remove the head , or can I use the compressed air method, or rope trick to hold up the valves .?
Would using these 's methods cause me a problem with timing ?,
Other's have said that by using the compressed air method or rope trick that the timing is not effected, but would be effected if the head had to be removed...however!...nobody I know has worked on this bmw n42 engine , therefore I am hoping that some of you guys might have , and can offer me much appreciated advice.
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Old 09-07-2014, 09:43 AM   #2
BartenderPlease
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Definitely use the compressed air method. You will need to re-time it since you are removing the camshaft and VANOS, etc.
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Last edited by BartenderPlease; 09-07-2014 at 01:26 PM.
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Old 09-07-2014, 01:18 PM   #3
uncleruin
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Thank you very much BartenderPlease, its a big help to have this sort of help, when you are about to attempt this type of D.I.Y task.
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Old 09-07-2014, 01:32 PM   #4
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Quote:
Originally Posted by uncleruin View Post
Thank you very much BartenderPlease, its a big help to have this sort of help, when you are about to attempt this type of D.I.Y task.
No problem, I did edit it though. I was not thinking clearly.
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Last edited by BartenderPlease; 09-07-2014 at 01:32 PM.
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Old 09-07-2014, 03:18 PM   #5
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I assume you are trying to resolve an oil consumption issue??

You may want to read this thread - http://forum.e46fanatics.com/showthread.php?t=1009367
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Fuel pump failures - http://forum.e46fanatics.com/showthread.php?t=929501

Temp Info - http://forum.e46fanatics.com/showthread.php?t=964491

Hidden OBC Menu - Check Voltage, Temps, Fuel Level - http://forum.e46fanatics.com/showthread.php?t=239619

E46/E39 GM5 Door Lock Info - www.bmwgm5.com

Lower hose fan switch O-ring - BMW #13621743299
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Old 09-08-2014, 06:04 AM   #6
uncleruin
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Thank you ifoi, for pointing me towards the other posts , I have looked at them before , and I have to say that I have learned alot thanks to the help of the guys on this site. So I can't thank you all enough for the work and time put in to help others who lack knowledge.

However!....on the question of oil consumption its not burning much only at start up, showing a bit of blue smoke....once the engine is hot the smoke has gone, I am about to replace the Vanos seals, and the vanos solenoid seals at the front as these are leaking, also the vacuum pump seal O-rings, as this has been dripping on the exhaust.

I will also replace the rocker cover gasket as this also is leaking on the back corners near to the vacuum pump.

If after doing these mentioned jobs the smoke at start up goes?....I will be very pleased, as I don't fancy doing the valve stem seals ...for this valve seal job I would need a tutorial of some sorts , and can't find one anywhere at the moment for this N42 engine.
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