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  #1  
Old 04-23-2002, 09:42 AM
brookspw's Avatar
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Join Date: Dec 2001
Location: Nashville, TN
Posts: 551
Arrow New valve seals tomorrow, couple of questions

My 1991 190E 2.6 is "going under the knife" tomorrow for new valve seals. Has been using 1qt per 5-600 miles and rough cold starting. Have already replaced the OVP and tested the idle control valve and they have not helped the cold start problem at all. Hoping that maybe it is caused by oil on the plugs and the new seals will remedy that.

1. While it is in the shop and the valve cover off (replacing seals ONLY unless guides are just shot to hell -- car has 130k) I'm wondering if there are any particular things I should have done.

2. Also, anything I want to make sure he does in replacing the seals -- I am assuming just OEM seals?

3. He will also change the oil. Should I continue with 10/40 or move thicker with 20/50 (Tennessee hot weather)?

4. How much to replace the shifter bushings while he has it?

5. How much to replace the front flex disc while he has it?

6. If you've had seals replaced -- how much $ and what was the book rate (# of hours)?

Thanks -- brookspw

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1994 C280, dark green metallic
105k miles

1991 190E 2.6, Black
191,500 miles
(sold to another forum member)

2003 Chevy Tahoe LT, Redfire Metallic
105k miles

1989 Mustang GT Cobra Convertible
43k miles
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  #2  
Old 04-23-2002, 10:13 AM
pmizell's Avatar
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Join Date: Jun 2001
Location: Houston, Texas
Posts: 838
I don't know much about your engine, but if it has a coolant temperature sensor on the head (probably 2 pin, light blue) a bad one could be the cause of your cold start problems.

The only other item you listed that I can speak to are the shifter bushings. This should be no more than an hour job, with parts costing about $5 (2 nylon bushings). If you are just a beginner DIY'er you could do this job. It's all done underneath the vehicle.

Good luck!

~Paul

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'91 300E, 210k miles
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  #3  
Old 04-23-2002, 10:27 AM
Registered User
 
Join Date: Feb 2002
Location: Bend, Oregon
Posts: 112
I had the guides and seals replaced a couple of years ago on my 560SL. I was, like you, burning a quart of oil about every 500 miles. I believe I paid about $450 for the repair. From that point on my car never burned another drop of oil between changes. What a relief!

Best of luck to your and your car!
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Scott
2002 G500
2003 Audi Allroad
1999 Range Rover
1992 500SL (sold)
1999 ML320 (sold)
1989 300SE (sold)
1987 560SL (sold)
1986 300E (sold)
1983 300SD (sold)
1982 300D Turbo (sold)
1980 300D (sold)
1973 450SL (sold)
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  #4  
Old 04-23-2002, 10:27 AM
brookspw's Avatar
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Join Date: Dec 2001
Location: Nashville, TN
Posts: 551
Let me elaborate on my "cold start" problem. It is not only when cold, but even if left to sit for 15 minutes or so. It starts ok but runs rough for several seconds before smoothing out. Every once in a while it will continue if at a low idle (sitting at stoplight,etc.) and doesn't smooth out until at higher RPM.

brookspw
__________________
1994 C280, dark green metallic
105k miles

1991 190E 2.6, Black
191,500 miles
(sold to another forum member)

2003 Chevy Tahoe LT, Redfire Metallic
105k miles

1989 Mustang GT Cobra Convertible
43k miles
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  #5  
Old 04-23-2002, 10:30 AM
brookspw's Avatar
Registered User
 
Join Date: Dec 2001
Location: Nashville, TN
Posts: 551
Smalk -- I don't know the engine on your car, but mine requires that the head be removed to replace the guides. That adds about 10 hours to the job. Sure WISH I could have guides replaced for $450!

brookspw
__________________
1994 C280, dark green metallic
105k miles

1991 190E 2.6, Black
191,500 miles
(sold to another forum member)

2003 Chevy Tahoe LT, Redfire Metallic
105k miles

1989 Mustang GT Cobra Convertible
43k miles
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  #6  
Old 07-09-2002, 10:35 PM
Jane Selkirk Pabst
 
Join Date: Apr 2002
Location: Texas
Posts: 51
Smile cost of valve seal job

My 420sel was burning oil and I got on this forum and found out that it cost about $50 in parts and 2 1/2 hours labor instead of the 8 hrs. that the alldata website says. So instead of paying from$400-2000 that had been quoted me, I paid $280. I feel like a genius and I was surprised at the mechanics who were trying to rip me off. I got my mechanics respect and I fell like alot of car repair places are just sitting around waiting for uninformed people to come and get taken. Thank You Shopforum!

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