Blue smoke

Need technical Q/A then you're in the right place

Moderator: martauto

Post Reply
User avatar
Newbiee30
E30 Zone Newbie
E30 Zone Newbie
Posts: 55
Joined: Fri Apr 04, 2008 11:00 pm

Sat Jan 24, 2009 3:29 pm

Hi,

My car has started to smoke in the mornings on start up, can anybody help me :?
E30BeemerLad
Married to the E30 Zone
Married to the E30 Zone
Posts: 16806
Joined: Mon Mar 28, 2005 11:00 pm
Location: Norfolk

Sat Jan 24, 2009 3:32 pm

valve stem oil seals most likely

Does it just chuck out some on startup and maybe for the first minute or so & then it's alright?
rix313
E30 Zone Team Member
E30 Zone Team Member
Posts: 4957
Joined: Fri Oct 31, 2008 11:00 pm
Location: Silverstone
Contact:

Sat Jan 24, 2009 3:34 pm

If you can get it to a garage, see if they'll compression test it for nothing to make sure it isn't the piston rings.
User avatar
Newbiee30
E30 Zone Newbie
E30 Zone Newbie
Posts: 55
Joined: Fri Apr 04, 2008 11:00 pm

Sat Jan 24, 2009 3:34 pm

Yep that's what happens are the stem seals easy to change :?: or is worth using an oil treatment??
E30BeemerLad
Married to the E30 Zone
Married to the E30 Zone
Posts: 16806
Joined: Mon Mar 28, 2005 11:00 pm
Location: Norfolk

Sat Jan 24, 2009 3:39 pm

what car/engine is it?

Stem seals can be replaced with the head in situ if you can find a way of keeping the valve from dropping down into the cylinder, one way is to connect an airline to the relevant chamber via the spark plug hole.

The usual way is to remove the head, but that of course creates more expense as you'll need a full headgasket set (which will contain the valve stem seals) plus bolts and then you end up with a new cambelt and doing the water pump whilst you're there. You're probably into £150 of parts to do it yourself. Probably a £300 job at a garage easily, unless they do it via the airline method, but they'll still want a good couple of hundred quid.

You can try a treatment I guess but i don't think they are often successful.
User avatar
Newbiee30
E30 Zone Newbie
E30 Zone Newbie
Posts: 55
Joined: Fri Apr 04, 2008 11:00 pm

Sat Jan 24, 2009 4:07 pm

My car is 318i M40 engine - that is little gutting oh well it moght cheaper to buy another car as it only cost me £350 to buy last year 8O
pony2
E30 Zone Regular
E30 Zone Regular
Posts: 805
Joined: Mon Oct 22, 2007 11:00 pm
Location: London

Sat Jan 24, 2009 4:10 pm

Depending on the condition of the shell (rust), might be worth thinking about an engine swop.
E30BeemerLad
Married to the E30 Zone
Married to the E30 Zone
Posts: 16806
Joined: Mon Mar 28, 2005 11:00 pm
Location: Norfolk

Sat Jan 24, 2009 4:11 pm

if the rest of the car is good then get another lump in there, another M40 lump isn't going to be more than £100 and if you can see/hear the engine running beforehand then it's less of a gamble on putting something in that's worse than what you've taken out
mrLEE30
E30 Zone Team Member
E30 Zone Team Member
Posts: 6589
Joined: Tue Jan 18, 2005 11:00 pm
Location: Sweating buckets in Bahrain

Sat Jan 24, 2009 4:42 pm

are you sure its blue smoke and not white smoke? Dont confuse blue oil smoke with white smoke due to condensation in your exhaust.

if it smokes the same once warm them begin worrying, if it is only white whispy smoke on start up when cold that quickly disappears then the condition may be perfectly normal for this time of year.

mrlee
Image
User avatar
geoffrey
E30 Zone Newbie
E30 Zone Newbie
Posts: 85
Joined: Fri Mar 07, 2008 11:00 pm

Sat Jan 24, 2009 5:32 pm

Or just live with it? Keep the oil topped up and she'll keep going for a while yet!
maxfield
Old Skooler
Old Skooler
Posts: 15186
Joined: Sat Nov 26, 2005 11:00 pm
Location: Mansfield

Sat Jan 24, 2009 5:55 pm

geoffrey wrote:Or just live with it? Keep the oil topped up and she'll keep going for a while yet!
Agree with that :)
Image
User avatar
sati
E30 Zone Regular
E30 Zone Regular
Posts: 533
Joined: Sun Oct 19, 2008 11:00 pm
Location: LONDON

Sat Jan 24, 2009 7:06 pm

ive got an engine m40 engine for sale can be seen and heard running (might be in for sale section, not sure if it posted) Pm me
User avatar
Newbiee30
E30 Zone Newbie
E30 Zone Newbie
Posts: 55
Joined: Fri Apr 04, 2008 11:00 pm

Sun Jan 25, 2009 9:59 pm

It's blue smoke it is a real shame because I love driving the car, there is a little rust around river side rear arch but that is it.

I think I'm going to live with until warmer weather comes and then get some quotes...
Post Reply