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elevatorbernie
Expert
Date registered: Aug 2006
Location: Vancouver B.C. Canada
Vehicle(s): 1989 280GE
Posts: 1347
| smog test question
I have take my G for a smog test. I'm worried because it involves driving it on a dynamometer. I remember someone saying never drive a G without the front wheels turning the front drive shaft, that it could damage the transfer case; due to lack of lubrication. Can anyone verfiy this to be fact? If yes, what are others doing in pollution controlled parts of the world, in regards to this type of test? The testing facility has a 4wheel drive dyno also, so running the test in four wheel drive could be an option. |
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amzimmy
Elite Veteran
Date registered: Apr 2006
Location: South Africa/Italy
Vehicle(s): GD300 1981, Alfa GT 3,2 V6, Alfa Brera Q4 3,2 V6.
Posts: 850
| RE: smog test question
elevatorbernie - 10/16/2006 11:39 AM
I have take my G for a smog test. I'm worried because it involves driving it on a dynamometer. I remember someone saying never drive a G without the front wheels turning the front drive shaft, that it could damage the transfer case; due to lack of lubrication. Can anyone verfiy this to be fact? If yes, what are others doing in pollution controlled parts of the world, in regards to this type of test? The testing facility has a 4wheel drive dyno also, so running the test in four wheel drive could be an option.
I think that the front wheel have to turn (460) in 2H the prop shaft from the front axle has to turn in order to lubricate the TC ..... or am I wrong? 
I guess , if it is so, you have to shift in 4H and have rollers under the front wheels. 
Here in SA .......well, they look...... if it is SMOKING...... then it's "no good" .....if it isn't smoking.....then something is wrong with your engine!!!!;) 
amzimmy 
Edited by amzimmy 10/17/2006 6:08 AM
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dai
Expert
Date registered: Apr 2006
Location: Oregon USA
Vehicle(s): 300GD 300TD BMW R100RS Landini 80F
Posts: 2110
| Re: smog test question
Run it on a 4WD dyno. It is unlikely that the time it would take to run a smog test would toast the T case but running without that front shaft turning in 2WD for a distance will oil starve key parts and can lead to catastrophic faliure. I have been running without the front shaft for quite a while but I keep the T case in 4WD so the oil pump in there is spinning. No problems. There are people on our forum that have damaged T cases due to oil starvation. It is a real problem and why there are no unlocking hubs on the G. To install an axle with unlocking hubs would require the use of a different T case. I think Q did just that on G Zilla.
-Dai |
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ewalberg
Expert
Date registered: Apr 2006
Location: Past: San Francisco. Present: Germany
Vehicle(s): 2000 g500
Posts: 1887
| RE: smog test question
in california our smog requires a dyno but it's only a 2wd dyno, so if it full time 4wd then you are exempt. The spirit of the exemption is that if your car needs all 4 wheels rotating to not suffer damage then you're exempt from the dyno portion. I would talk to them about it... sounds like you'd be exempt in cali from the dyno. |
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ufotwuk
Date registered: Dec 1899
Location:
Vehicle(s):
| Re: smog test question
I had my 2002 G500 registered as a commercial vehicle and have not been required to get any smog tests.
Phil |
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Photoman
Date registered: Apr 2006
Location: New Zealand
Vehicle(s): 280GE, ML500, 280SE 3.5
| Re: smog test question
We don't have any smog tests at all down here in NZ. In fact a lot of people take the cats out to improve performance. |
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B280
Member
Date registered: Jun 2006
Location: Vancouver,B.C.
Vehicle(s): 1986 280ge
Posts: 40
| Re: smog test question
I'm in Vancouver and have had to test a couple of times. Just choose the 4 wheel drive lane and you'll have no problem. I was worried at first too, but no problems. The first time I was in the wrong lane and they told me to move over. Front and rear wheels are on rollers.
Good luck. I had to take it twice last year.
Biski. |
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elevatorbernie
Expert
Date registered: Aug 2006
Location: Vancouver B.C. Canada
Vehicle(s): 1989 280GE
Posts: 1347
| Re: smog test question
B280, did you run the test in 4wd or did the dyno rollers turn the front wheels in 2wd to lubricate the t-case?
Edited by elevatorbernie 10/19/2006 2:59 AM
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cball
Member
Date registered: Apr 2006
Location: Vancouver, B.C.
Vehicle(s): '86 280GE
Posts: 44
| Re: smog test question
Here in Vancouver the 4wd specific lane's rollers are tied together so the rear rollers spin the front ones for you. Chris.
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B280
Member
Date registered: Jun 2006
Location: Vancouver,B.C.
Vehicle(s): 1986 280ge
Posts: 40
| Re: smog test question
Chris is right, the front ones spin so no need for 4wd.
Biski. |
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elevatorbernie
Expert
Date registered: Aug 2006
Location: Vancouver B.C. Canada
Vehicle(s): 1989 280GE
Posts: 1347
| Re: smog test question
Thanks to all for their replies.  To the Vancouver members, thanks for the info about Aircare's dyno. We should all meet up one day. pm me  Bernie. |
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