GolfGTIforum.co.uk
General => General discussion => Topic started by: danhock on 12 May 2004, 10:27
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Had my first MOT on my Golf on Friday....
It failed on the n/s rear wheel bearing, which cost me ?4 and 10 mins to fix!!
The interesting bit was the emissions test... 660ppm for CO. Which basically means that loads of air is getting into the system some how (not a MOT failure by the way).
So i though it must be a Vacum leak (i know it was igintion related as that had been sorted before). After checking all the hoses no leaks..... ???
So i thought id adjust the CO mixture on the Air flow meter.... Went to adjust the screw and guess what... it wasnt there!!!!
I think this may explain the emission result! without the screw im getting maximum air intake!!
Question is where do i get one of these screws!!!
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scrap yard?
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How did you change your wheel bearing in 10 mins for 4 quid?
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CO is measured as a percentage
HC is measured ppm
I thought HC is down to unburnt fuel?
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fookin hell!
golf vr6 knows his sh!t! :D
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High HC can also be down to oil consumption.
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I'm interested in how he did the whell bearing for that, in that time! i got quoted ?50 wherever i went (for each side) Eventually got it for ?50 for both sides, but it still took an hour at least...
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just checked the emission test and it was
670ppm for HC
0.28% CO
11.3% CO2
5.4% O2
Air Fuel Ration 18.4
The Bearing were from Eurocarparts... ?3.78 for just the bearing or ?8.77 for the kit (split bin, grease cap etc..)
It does only take 10mins!! take the wheel off... remove the hub and fit... easy...
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it will be alot easier on your car Dan as you have drums on the back, its a pain to get the rear discs off.
you did replace the shells as well as the bearings?
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Yep... very easy with drum brakes...
I did replace the shell too.
Do you reckon it looks like the air mix is too high then? i think so.
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So are you saying that ?100 is FAR too much for a pair of rear wheel bearings and fitting? Oh, i also have rear drums.
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I would say ?100 is alot....
Mind you a garage would say its an hours work for each side.
say ?30 an hour and ?10 for each side parts.
I think its always worth doing as much as possible yourself.
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In the end some guy came out to do it, and i think it was ?40. I bought the things from G&S. I watched him do it, it took quite a while. Can't even remember what he did now though!
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Deffo 2 hours work on a rear disc model, probably more, so 100 quid isn't too much.
Should only take an hour or a little more maybe on a drum brake model.
This simply because the drums can come straight off, disc brakes need to be totally dismantled.
Dan,
It sounds like your fuel mixture is TOO RICH, cos you have high level of hydrocarbons due to unburnt fuel.
You can do this yourself with a gunston colortune from Halfords.
Plug it in instead of a spark plug, connect the test spark plug to a ht lead, then observe the colour.
Adjust the co screw until you get a blue flame with orange tints in it.
It works well in the dark ;)
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cool...
Only problem is that i dont have a CO screw...
;D ;D
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Go to VW.
Ask them what size and length the screw is.
If they can't get one then go and buy the screw ay any hardware store.