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Old 17th January 2010, 09:20 AM   #21
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One of the main reasons why a head gasket is prone to fail, imho, is the oil and coolant in the car not being replaced at intervals or soon.

As oil gets older, you all will notice how black it gets, but it also gets very, very thin and lose its properties which mean that it will go and carbonise at places it normally will not stick.

Fresh oil has sticky properties and does not heat up a much as old oil thus keeping it at a temperature the engine and its loads can take.

Was it fifth gear who ran a test recently on what happens to a car when the oil is low or rund out....the parts including head hasket became fused together.

A well lubricated car with freshest oil is a fantastic and cheap way to maintain engine efficiency - i know people are different but i definiteky feel a bit more grunt in the car when I've just changed the oil.

Each to his/her own but I swear by regular oil changes for preventative measures. I am planning on keeping my m3 for at least 5 years and only doing about 2.5 k per annum. at 76k now, thats about 88 k miles for a 12 year old car so my intervals on oil changes will be minimum once a year.....
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Old 17th January 2010, 09:31 AM   #22
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Quote:
Originally Posted by I-Love-M3 View Post
One of the main reasons why a head gasket is prone to fail, imho, is the oil and coolant in the car not being replaced at intervals or soon.

As oil gets older, you all will notice how black it gets, but it also gets very, very thin and lose its properties which mean that it will go and carbonise at places it normally will not stick.

Fresh oil has sticky properties and does not heat up a much as old oil thus keeping it at a temperature the engine and its loads can take.

Was it fifth gear who ran a test recently on what happens to a car when the oil is low or rund out....the parts including head hasket became fused together.

A well lubricated car with freshest oil is a fantastic and cheap way to maintain engine efficiency - i know people are different but i definiteky feel a bit more grunt in the car when I've just changed the oil.

Each to his/her own but I swear by regular oil changes for preventative measures. I am planning on keeping my m3 for at least 5 years and only doing about 2.5 k per annum. at 76k now, thats about 88 k miles for a 12 year old car so my intervals on oil changes will be minimum once a year.....
mine had oil change every 5-6k miles
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Old 17th January 2010, 10:32 AM   #23
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Excellent thread - well done M Thriller - rep added.
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Old 15th February 2010, 04:26 PM   #24
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X5's have a similiar problem with HG going on 80Kish miles also.
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Old 7th May 2010, 04:20 PM   #25
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OK a little update for 2010 lol!

Heres a link to another recent thread regarding headgasket failures:
http://forums.m3cutters.co.uk/showthread.php?t=14095

And a quick diy compression test:

http://forums.m3cutters.co.uk/showth...ght=headgasket

Last edited by m thriller; 7th May 2010 at 04:29 PM.
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Old 19th May 2010, 07:23 PM   #26
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very helpful, cheers
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Old 19th May 2010, 08:49 PM   #27
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No problem.
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Old 19th September 2010, 05:25 PM   #28
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Default head gasket

i am a new member and not really sure how all this works so i will go ahead and ask my question and i hope im not offending anyone by not really introducing myself properly. i would like to get a compression test done on m3 and would like someone to recommend a good mechanic i am in the surrey area
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Old 21st September 2010, 08:34 AM   #29
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As a preventative measure, It would also be benficial to change/replace the vanos bolts at the same time. According to recent reports, there is a high chance that they will be working there way loose on cars with over 50kmiles. BMW are aware of this issue so have redesigned them.
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Old 31st December 2010, 04:53 PM   #30
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my m has 45,000 on it, I will get this checked next pit stop, cheers
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Old 12th January 2011, 07:37 PM   #31
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Couldn't agree more on the oil front I have always changed mine on a more than regular basis when I had my garage I put it this way to customers ITS THE BLOOD OF THE ENGINE !!
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Old 7th March 2011, 01:05 PM   #32
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How common is this problem? Only I did a search on E46 Fanatics and couldn't find any threads about headgaskets going on M3's?
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Old 7th March 2011, 03:13 PM   #33
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Quote:
Originally Posted by DJ Syxx View Post
How common is this problem? Only I did a search on E46 Fanatics and couldn't find any threads about headgaskets going on M3's?

Getting common now, especially as the mileages rack up and cars getting older.

I must have arranged headgasket replacement for atleast 10 e46 m3's now, and approx 6-7 car are from the forum.

There not too bad because considering all the members on here and only 6-7 cars..............not too bad of a ratio.
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Old 10th March 2011, 10:25 PM   #34
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Quote:
Originally Posted by shimmy View Post
nice write up

had my head gasket go after 65k miles, same symptoms but thought it may have been caused by injectors being old and running inefficiently and lean

cylinder 5/6 gasket was worse but the other positions was going as well
Hi,
were you getting alot of pinking noises? was it worse when the engine was under pressure, say going up a hill in fourth something that this torquey engine should cope with anyway.
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Old 21st April 2011, 07:18 PM   #35
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Is there anyone on cutters that can do a compression test for me?

I just want to ensure my head gasket is not going to go pop.

i am getting a very faint marble sound between 1200 to 2000 revs.
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Old 21st April 2011, 07:20 PM   #36
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Quote:
Originally Posted by Hitman View Post
Is there anyone on cutters that can do a compression test for me?

I just want to ensure my head gasket is not going to go pop.

i am getting a very faint marble sound between 1200 to 2000 revs.

M Thriller is your man
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Old 22nd April 2011, 01:47 AM   #37
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Quote:
Originally Posted by Hitman View Post
Is there anyone on cutters that can do a compression test for me?

I just want to ensure my head gasket is not going to go pop.

i am getting a very faint marble sound between 1200 to 2000 revs.
Where abouts in the country are u mate?

If u can remove spark plugs, then u should be able to do the test your self.
Do u get the marble rattling sound at like 30-50% throttle between 1500-3k rpm?
Does it do it more when in a higher gear like 5th or 6th?
Drive at a steady 1500 rpm in 4th and then slap the pedal to the metal....can u here the marble sound when throttle is at WOT between the same rev range?
Do it again if u dont here anything but use 30-50% throttle....can u hear it now?
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Old 22nd April 2011, 11:58 AM   #38
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Im in the mids, near leicestershire.

I just did a good run and noticed that the rattling/tapping is mainly noticeable between gears 1 and 2 at between 1-2k revs at 30% gas.

At gears 4,5 and 6 sometimes you can catch a faint rattling/tapping but its very faint at 40% gas.

Basically at low revs you can hear it, but revs higher than 2.5 the rattling is like someone holding a corner of a piece of paper against a moving fan and you get that fast flicking sound.

if that makes any sense

The cars always been like this since i got it, over 8000 miles ago. Its not got any loader.
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Old 22nd April 2011, 12:51 PM   #39
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Quote:
Originally Posted by Hitman View Post
Im in the mids, near leicestershire.

I just did a good run and noticed that the rattling/tapping is mainly noticeable between gears 1 and 2 at between 1-2k revs at 30% gas.

At gears 4,5 and 6 sometimes you can catch a faint rattling/tapping but its very faint at 40% gas.

Basically at low revs you can hear it, but revs higher than 2.5 the rattling is like someone holding a corner of a piece of paper against a moving fan and you get that fast flicking sound.

if that makes any sense

The cars always been like this since i got it, over 8000 miles ago. Its not got any loader.
i wouldnt have described my noise like you have so maybe you're not looking at HG.
when my HG was goosed i found that the noise was more promenant in higher gears going up hills.

andy.
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Old 22nd April 2011, 12:57 PM   #40
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Quote:
Originally Posted by Andy B View Post
i wouldnt have described my noise like you have so maybe you're not looking at HG.
when my HG was goosed i found that the noise was more promenant in higher gears going up hills.

andy.
yep its normally alot louder and more noticable in the higher gears between 2-4k rpm and worst in 6th.

U might have something else like a knock sensor or dirty injectors which could be causing it to pink.

Any decent garage should be able to do the compression check for u and shouldn't cost much more than 40-50.
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