GolfGTIforum.co.uk

Model specific boards => Golf mk4 => Topic started by: madhead1987 on 14 May 2012, 21:45

Title: smoking on idle when hot ??
Post by: madhead1987 on 14 May 2012, 21:45
hi all im new to this forum and was wondering if anybody could enlghten me on what my problem may be ?
basically when the egines hot and left to idle for 2 mins it starts to smoke badly, 1st thing i thought was its the turbo, so i got a bargain om a ko3s £60 which turned out to be duff, but hey £60 not bad, any way i then rebuilt the turbo new bearing etc, still smoking so i then purchased a catch can to see if that would help ,still no joy any ideas anybody beacuse its doing my f**king head in

thanks to any one who replys in advance
Title: Re: smoking on idle when hot ??
Post by: richw911 on 14 May 2012, 21:48
Valve stem seals?
Title: Re: smoking on idle when hot ??
Post by: Chris#101 on 14 May 2012, 21:52
Valve stem seals?


+1 would deffinitely be the next call!

Isnt it funny theres been about 5 or so topics recently within the last month from different people with the same problem  :huh:
Title: Re: smoking on idle when hot ??
Post by: richw911 on 14 May 2012, 21:55
Valve stem seals?


+1 would deffinitely be the next call!

Isnt it funny theres been about 5 or so topics recently within the last month from different people with the same problem  :huh:

Yeah I noticed this  :shocked:



OP -Assuming you have the correct grade of oil and its not over filled?
Title: Re: smoking on idle when hot ??
Post by: madhead1987 on 14 May 2012, 21:59
thanks is it a common thing to happen , i have quantum 10/40 is that right and is filled right to the mark
Title: Re: smoking on idle when hot ??
Post by: daz veedub on 14 May 2012, 22:57
oil info  :smiley:
http://www.golfgtiforum.co.uk/index.php?topic=95412.0

wouldnt it be smokey from start up if valve stem seals  :undecided:
Title: Re: smoking on idle when hot ??
Post by: Toby on 14 May 2012, 23:01
Cracks on turbo??

Ht = cracks get bigger
Title: Re: smoking on idle when hot ??
Post by: rockmonkey69 on 15 May 2012, 00:41
Cracks on turbo??

Ht = cracks get bigger

Not unless you mean the core is cracked but then you would know about it! smoking will be the least of your worries thats for sure!  :shocked:

Can't say based on the limited information provided, what colour is the smoke? Where is it coming from? Breathers? Exhaust? You said you have a catch tank fitted, did you check none of the pcv hoses were blocked? (a blocked breather, or incorrectly routed breather setup will cause smoke out your exhaust) does the smoke go away when you drive off? Does it persist? Does it get worse on boost?

Alot of valve stem seals wear out, it's not a VW thing or a golf thing, it's an age thing as the material goes through expansion and contraction it begins to become brittle and fails to form a tight seal. Given the golf mk4 platform is over 10 years old now it's not surprising. Quite a few Honda engines suffer from this but some of their engines are bomb proof. Forum members will be able to better assist you when you get back to us with the above.
Title: Re: smoking on idle when hot ??
Post by: dan2252 on 15 May 2012, 07:52
my mk4 started smoking i was running on 530 fully was burning over a litre a week changed to 1040 part and it smokes if you rev it fairly hard from cold but of coruse you shouldnt be reving it hard when cold anyways but is yours burning alot of oil? whats milage like?
Title: Re: smoking on idle when hot ??
Post by: madhead1987 on 15 May 2012, 16:08
Hi sorry it's took a while to get bk to your comments it's seems to b more white than blue and it goes when driving car has done 112k services upto date , think I've done the catch can right I followed a guide on here I believe , the smoke itself comes from the back when it does smoke a blip of the throttle a bit more comes out then it clears hope this helps

I did check ye turbo for cracks and etc when I rebuilt it violent level not dropping neither oil level ???
Title: Re: smoking on idle when hot ??
Post by: bobbieboy69er on 15 May 2012, 16:29
Hi sorry it's took a while to get bk to your comments it's seems to b more white than blue and it goes when driving car has done 112k services upto date , think I've done the catch can right I followed a guide on here I believe , the smoke itself comes from the back when it does smoke a blip of the throttle a bit more comes out then it clears hope this helps

I did check ye turbo for cracks and etc when I rebuilt it violent level not dropping neither oil level ???

Are you sure theres actually something wrong, my car smokes when cold.... mainly becuase its cold, also condensation has a part to play and your engines on the choke.....
Title: Re: smoking on idle when hot ??
Post by: rockmonkey69 on 15 May 2012, 16:54
As above, it could be nothing, are you losing coolant?
Title: Re: smoking on idle when hot ??
Post by: madhead1987 on 15 May 2012, 17:56
dont seam to be loosing anything its confusing f**k out of me ive checked all the pipes are on right could it be the hockey puck not working forgot what they called ?
Title: Re: smoking on idle when hot ??
Post by: rockmonkey69 on 15 May 2012, 19:06
It may well be that you have a blocked breather hose, if your not losing any fluids it's pretty unlikely you have a major problem. Go through your breather hoses leading to and from your catch tank as well as any standard pcv hosing just to make sure it's not clogged.
Title: Re: smoking on idle when hot ??
Post by: madhead1987 on 15 May 2012, 19:12
will do ill report back 2 moz cheers
Title: Re: smoking on idle when hot ??
Post by: bobbieboy69er on 15 May 2012, 19:16
Hi sorry it's took a while to get bk to your comments it's seems to b more white than blue and it goes when driving car has done 112k services upto date , think I've done the catch can right I followed a guide on here I believe , the smoke itself comes from the back when it does smoke a blip of the throttle a bit more comes out then it clears hope this helps

I did check ye turbo for cracks and etc when I rebuilt it violent level not dropping neither oil level ???

Are you sure theres actually something wrong, my car smokes when cold.... mainly becuase its cold, also condensation has a part to play and your engines on the choke.....

Sorry, why did i think the subject was smoking when cold!? :laugh: :laugh:  Ignor me!! :rolleyes:
Title: Re: smoking on idle when hot ??
Post by: madhead1987 on 15 May 2012, 19:44
Hi sorry it's took a while to get bk to your comments it's seems to b more white than blue and it goes when driving car has done 112k services upto date , think I've done the catch can right I followed a guide on here I believe , the smoke itself comes from the back when it does smoke a blip of the throttle a bit more comes out then it clears hope this helps

I did check ye turbo for cracks and etc when I rebuilt it violent level not dropping neither oil level ???

Are you sure theres actually something wrong, my car smokes when cold.... mainly becuase its cold, also condensation has a part to play and your engines on the choke.....

Sorry, why did i think the subject was smoking when cold!? :laugh: :laugh:  Ignor me!! :rolleyes:


lol i do it all the time
Title: Re: smoking on idle when hot ??
Post by: Scott D on 16 May 2012, 02:16
If you've done the catch can check the breather hose which goes into the engine make sure its connected tight and sealed - might even be worth renewing that pipe and clip if not already done so.

I had a similar problem using the original hose as the outer plastic had perished making it a struggle to fit correctly.

Caused white smoke after revving while idle as seen here - http://www.youtube.com/watch?v=Nq1t_LRvXqQ
Title: Re: smoking on idle when hot ??
Post by: madhead1987 on 16 May 2012, 07:10
I've just checked the hoses before I go work there all tight and secure still confusing as hell I'm gna wip the plugs out see what they look like :-/