Welcome to 911UK
The only place for Porsche, 911uk is the definitive enthusiast and resource site for the Porsche 911.
Registration is fast, simple and absolutely free, so join up today for full access to the site and benefit from latest member offers.

Porsche Classifieds
Porsche Buyers Guides
Sell Your Porsche on 911uk
Create a Free Classified Advert
Search Ads
Classified Adverts FAQ
Trade Classified Information
Buyer & Seller Fraud Protection
Pre Purchase Inspection (PPI)
Porsche Car Sourcing
Porsche Cars Wanted
Porsche 911
991 : 2011- 7
997 : 2004- 64
996 : 1997-2005 37
993 : 1993-1998 7
964 : 1989-1993 0
Carrera 3.2 : 1983-1989 0
Carrera SC : 1977-1983 0
930 Turbo : 1975-1989 1
Early 911 : 1964-1977 0
Porsche Other Models
Classic : 1950-1965 0
Boxster : 1997- 13
Cayman : 2005- 17
Cayenne : 2003- 9
Macan : 2014- 1
Panamera : 2009- 1
912-914-924-928-944-968 5
959 - CarreraGT - RaceCar 0
Car Parts For Sale & Wanted
Other Items For Sale & Wanted
Wheels Tyres For Sale & Wanted
Number Plates For Sale Wanted

Porsche Services
Porsche Body Shop Repair
Paint Protection & Body Wrapping
Porsche Classic Insurance
Porsche Classic Parts
Porsche Classic Restoration
Porsche Design Collection
Porsche Engine Gearbox Rebuild
Porsche Heritage & History
Porsche News
Porsche Picture Gallery
Win a New Porsche 911

Porsche Parts
Body Parts, Body Styling
Brakes, Clearance
Electrical, Exhausts
Engine Cooling, Engine Electrical
Engine Rebuild, Heating Cooling
Interior Incar, Lighting
Rubber Seals, Service Parts
Steering, Suspension
Transmission, Workshop Tools
Early 911, 911 - 930, 928 - 968
964 - 993, 996 - 997, Boxster
Cayman, Cayenne, Panamera

Porsche Model Range
911 [991] 2011-Current
Porsche 911 [991]
911 [997] 2004-Current
Porsche 911 [997]
911 [GT] GT1-GT2-GT3
Porsche 911 [GT]
911 [996] 1997-2005
Porsche 911 [996]
911 [993] 1993-1998
Porsche 911 [993]
911 [RS] RS-RSR
Porsche 911 [RS]
911 [964] 1989-1993
Porsche 911 [964]
911 3.2 1983-1989
Porsche 911 3.2 Carrera
911 SC 1977-1983
Porsche 911 SC
911 [Early] 1964-1977
Porsche 911 [Early]
Boxster & Cayman
Porsche Boxster & Cayman
Cayenne & Panamera
Porsche Cayenne & Panamera

911uk Site Partners

Post new topic   Reply to topic
Author Message

Joined: 25 Feb 2017
Posts: 3

PostPosted: Sat Feb 25, 2017 6:01 pm    Post subject: White Smoke From Exhaust on Start Up Reply with quote

I have a Low Mileage 1991 Porsche 965 (Turbo). Plenty of Oil Pressure at normal Operating Temperature and performs brilliantly. The car has been kept in my garage unused (on the road) for around two years. I start up the car regularly to keep the Oil Circulating and stop the Oil Seals from drying out. I started the car up today and masses of white smoke was being pumped out of the Exhaust. I let the car run up to Operating Temperature as normal but the thick white smoke was still being pumped out. l calmed the neighbours down and assured them there wasn't a fire - kind of them to ask. I shut the engine down and made a coffee while the white smoke cleared. After 20 minutes or so, l started to car up again and,,,,,,,,,,,,,NO MORE WHITE SMOKE - Hallelujah !!! What was going on ???
View user's profile Send private message

Joined: 16 Sep 2010
Posts: 2422
Location: The Middle lands

PostPosted: Sat Feb 25, 2017 6:48 pm    Post subject: Reply with quote

When the car sits for a length of time, oil will migrate into the cam covers/ valve gear. When this happens often it get sucked through the valve seals and burns off in the combustion chambers, hence white smoke.

Can also be classic oil overfill being burned off if you have recently topped up the oil. Thumb
- 964 C2 The Red Baron - 914 2.0 Project Blue Book - Amber Alert! -
View user's profile Send private message

Joined: 25 Oct 2009
Posts: 11181
Location: Cheshire

1993 Porsche 964 Anniversary

PostPosted: Sun Feb 26, 2017 12:08 am    Post subject: Reply with quote

Also it's not a good idea to just keep starting the car up and not driving it. More wear is done. Better to leave it be then after several months pull the DME relay to build oil pressure first as you turn it over. Replace DME then fire it up Thumb
Me? The 13th Duke of Wybourne? Here? In a sixth form girl's dormitory? At three o'clock in the morning? With my reputation? What were they thinking of?
View user's profile Send private message

Joined: 19 Jan 2014
Posts: 72
Location: Prestwick

PostPosted: Mon Feb 27, 2017 3:43 am    Post subject: Reply with quote

Chief's correct, a common issue.
Rothsport make a one way valve which fits in the oil line and prevents this, you'd need to check that the fitment is correct for your car though.
It's also bloody expensive for what it is IMO at $300 + shipping +rip off import tax.
I'd be surprised if you also don't have oil dripping onto your heat exchangers as the lower rocker area will be full of oil and the valve covers are not the best at sealing.

Best preventative measure, take it for a drive at least once a week .... Says me who's done around 10K in 11 years in mine.
View user's profile Send private message

Joined: 25 Feb 2017
Posts: 3

PostPosted: Mon Feb 27, 2017 11:01 am    Post subject: Reply with quote

Thanks to everyone for all the very helpful suggestions concerning the possible cause/s of the White Smoke at start-up.

Since the initial time this had happened, l have started up the car and everything appears absolutly fine - no sign of white smoke and no sign and/or smell of burning oil and perfect, smooth running at Tickover.

The Oil Level is perfect at full engine working temperature and l have since thought the problem might have been caused by a small amount of Power Steering fluid leaking from the Pump and running down the Flexible Hose which connects to the Power steering Reservoir which sits above the right-hand Heat Exchanger - the Chassis Member is a little wet in this area.

The PS Reservoir had needed Topping Up after a run on a couple of ocassions.

Lets hope this is the cause - l will keep the Forum informed.

And, once again, a Big Thanks again for all the interest shown and the time taken to Post suggestions !!!

I will now concentrate on getting the Beast out for a long run at speed and clear its lungs out - YES, Porsches really DO need to be driven !!!
View user's profile Send private message
Display posts from previous:   
Post new topic   Reply to topic   All times are GMT - 11 Hours
Page 1 of 1

Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum
You can attach files in this forum
You can download files in this forum
You cannot post calendar events in this forum