850 T5 Blue Smoke after a couple hours of sitting

fantajuice · Post by **fantajuice** » 24 Aug 2020, 07:58

I bought myself kind of a cat-in-the-bag 850 T5 (and I love it) a few days back, didn't really have any info on it, but the price was good and it recently passed MOT (in Finland), and it obviously has issues which the previous owner did not mention.

The current biggest issue I'm trying to figure out, is what's causing it to smoke after stating the car up after it has sat still for a little while. It smokes visibly gray-ish until I floor it, after that the smoke's gone, but during the first flooring it leaves a giant trail of blue smoke behind. Doesn't happen with a warm-ish engine. Sometimes doesn't happen at all.

Changed the oil and filter yesterday but the issue is still here.

Post by **Sveedy** » 24 Aug 2020, 08:27

Welcome to the madness !

Typically, what your describing is a sign of valve seals going bad. Oil seeps down the valve stems when the car sits and collects in the piston cylinders. When you fire it up the oil burns off.
Not the end of the world.

Post by **RickHaleParker** » 25 Aug 2020, 22:36

Leaking Valve stem seals.

Does it smoke going a down long hill?

You might try a bottle of ATP's AT-205 Re-Seal in the crankcase.

If you have a air compressor and the valve seats are good. You can replace the Valve stem seals without removing the cylinder head. You use the compressed air to hold the valves up as you change the seals.

fantajuice · Post by **fantajuice** » 26 Aug 2020, 03:25

It doesn't smoke at all once I've driven for a couple of minutes, only during the first minutes when the car warms up and when I start driving.

I'll try the oil leak stopper, thanks for the tip!
Honestly thought it was the turbo at first, never had a turbo gasoline car before.

callahanoffroad · Post by **callahanoffroad** » 26 Aug 2020, 05:43

fantajuice wrote: ↑26 Aug 2020, 03:25 It doesn't smoke at all once I've driven for a couple of minutes, only during the first minutes when the car warms up and when I start driving.

I'll try the oil leak stopper, thanks for the tip!
Honestly thought it was the turbo at first, never had a turbo gasoline car before.

Be cautious about driving it too long with leaking valve stem seals, as the leaking oil will cake onto the valves and eventually burn out your valves, which is much more money and work than just fixing the stem seals.

That's actually my next project myself.

fantajuice · Post by **fantajuice** » 26 Aug 2020, 11:32

I kind of don't want to make a new thread for this, but my ABS light came on after reseating the fuses (to check them all), and it won't go off. Speedo works.
Diagnostics tool under the hood won't respond to ABS (3A) and neither will it let me reset codes, won't do anything except react to pushing the button.

Post by **RickHaleParker** » 26 Aug 2020, 12:03

fantajuice wrote: ↑26 Aug 2020, 11:32 neither will it let me reset codes, won't do anything except react to pushing the button.

Read all the codes twice, after seeing the first code the third time.

1. Press and hold the button for more than five seconds, then release it. This get it into erase mode.

2. When the LED lights, press the button again for more than five seconds and release.

3. If the LED goes off, then the memory is cleared.

Post by **June** » 26 Aug 2020, 12:07

If this is your first experience with a turbo equipped car than you should familiarize yourself with proper care. The owners manual should have instructions for things like proper shutoff procedure after spirited driving for example. Welcome to MVS! You're in the right place!!! June

fantajuice · Post by **fantajuice** » 26 Aug 2020, 12:21

RickHaleParker wrote: ↑26 Aug 2020, 12:03
fantajuice wrote: ↑26 Aug 2020, 11:32 neither will it let me reset codes, won't do anything except react to pushing the button.
Read all the codes twice, after seeing the first code the third time.

1. Press and hold the button for more than five seconds, then release it. This get it into erase mode.

2. When the LED lights, press the button again for more than five seconds and release.

3. If the LED goes off, then the memory is cleared.

Thing is, it won't flash for ABS or for resetting at all. Module 7A did respond so I know the thing is working somewhat. If it matters, in port 3, when plugging it into the port, the led glows dimly without pressing anything.

June wrote: ↑26 Aug 2020, 12:07 If this is your first experience with a turbo equipped car than you should familiarize yourself with proper care. The owners manual should have instructions for things like proper shutoff procedure after spirited driving for example. Welcome to MVS! You're in the right place!!! June

I spent 8 hours reading through the owners manual a few days back, though I still didn't get through the entirety of it. Thanks for the warm welcome!

Post by **misha** » 26 Aug 2020, 16:56

callahanoffroad wrote: ↑26 Aug 2020, 05:43
Be cautious about driving it too long with leaking valve stem seals, as the leaking oil will cake onto the valves and eventually burn out your valves, which is much more money and work than just fixing the stem seals.

I have leaky valve stem seals for last 10+ years.

Engine burns a liter of oil per 2-3k km.
It doesn't get worse since the oil consumption is pretty much the same for last 10+ years.

When it was almost brand new(69k km) it used 1-1.5l/10.000km if you drive it hard.

Runs and pulls strong and purrs like a kitten.

Daily driver from almost brand new.

I think that main secret is to floor it in high rpms 2-3 times a month,to burn off those oily deposits from valves.
Maintained regularly and engine never had a hiccup.
Mileage is 320+k km.