akolodesh

My wife and I have a number of good friends (at least 10) at LexisNexis. It is certainly a major employer in the area. We live about 5 miles from it. When you visit, definitely contact me. One of our LexisNexis there just hosted a group from Europe last week.

Caveman

Will do, I visit them a few times a year (I work for their parent company Reed Elsevier).

Cheers,

David

Rick Lee

I got a good puff of bluish smoke when I fired up my 993 today. I keep her in a secure garage about 10 miles from my house and she's been sitting for a week. But I don't think it puffs any smoke at all when I start it during regular weekend use. I've put 1000 miles on her since she came back from the shop and the level hasn't dropped at all. So I don't think I have anything to worry about. I look forward to DIY'ing this rebuild, but don't have time to deal with it for quite a while.

Pedro356C

I don't know if this rule is applicable to my car's "grandsons" but for a pushrod engine...black smoke means unburned gas because your mixture is too rich and you can easily fix that...blue smoke means oil is escaping past the rings and valves...

Test: Go to a quiet road, accelerate strongly (in secong gear) until close to red line and then just take your foot off the gas and let the engine slow the car while you keep an eye on the rearview mirror...

Take care...

Dave R.

If oil is seeping past the rings, you may be able to reduce that by idling the engine just before shut down (30-60 seconds?) so that the scavenge pump has time to clear the crankcase and fill the oil tank.

In other words, idle it long enough for your oil level gauge to come up and stabilize, then shut down.

Less oil in the sump, less to seep past the rings.

orcfromthesouth

Pedro's formula is a good test for the seals. As you close the throttle, the high vacuum formed by the piston sucking on a closed gate will suck oil past the faulty seal and into the intake runner. Thi soil is the tell tale blue smoke you see on deceleration.

Marv

I am on the north side, above Springfield.

Marv

GabiOsz

What does black smoke mean?

Rick Lee

Black smoke means your mixture is too rich. Check your O2 sensors and head temp sensor.

GabiOsz

Where's the head temp sensor, is that a DIY replacement?

Rick Lee

Not sure where it is on a 993. Probably the same as older 911's, which would be the forward-facing part of the head on cyl. #3 on the underside of the engine. IFRC, you can cut the old wire off and use a socket to get the sensor out. Getting the new one in (since you don't want to cut that wire) is a little trickier. You probably have to buy, borrow or make a special tool. But of course, you'd want to test it and be sure that the problem before going through this job.

GabiOsz

Ok, I don't have a lift, so I may have to consult my mechanic.

Rick Lee

You don't need a lift for this. Just put the rear on jack stands. I don't have my workshop manual on this new computer yet, of I'd be able to tell you for sure.