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 Post subject: 928 '83 4.7 puffs grey smoke at 3,000 + revs
PostPosted: Wed Jun 14, 2017 10:16 pm 
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Joined: Tue Dec 14, 2010 10:10 pm
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Hi all, just getting my 928 running in after its been stood for 3 years. I've noticed it puffs of grey smoke at high revs roughly at 3,000 or when driving and revs over 3,000rpm. At idle its perfect with no smoke. I've just given her a oil filter/oil change using 5/40.

I did run her at low revs just to run her in after been stood.

Any suggestions?


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 Post subject: Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
PostPosted: Wed Jun 14, 2017 11:35 pm 
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Joined: Mon Nov 05, 2007 4:15 pm
Posts: 2411
Location: BOURNEMOUTH
rajg wrote:
Hi all, just getting my 928 running in after its been stood for 3 years. I've noticed it puffs of grey smoke at high revs roughly at 3,000 or when driving and revs over 3,000rpm. At idle its perfect with no smoke. I've just given her a oil filter/oil change using 5/40.

I did run her at low revs just to run her in after been stood.

Any suggestions?


Hi :)

Umm your oil is too thin...

Change it again for either 20/50 or I use 15/50 Full synthetic...

I tried 0/40 when i got mine and had exactly the same smoke problem....

05/40 IS FINE if you run a modern 911... but our engines were never designed for an oil that thin...its going past the rings and valve stem seals...

And more revs...more smoke...


All the best Brett :)

_________________
928S2 AUTO V8 4.7 1986-XPIPES ANDERSON RACE EXHAUST,K&N, WIZARDS OF NOS MAXX RACE CONTROLLER & WON RACE REVO NITROUS KIT 2000 HP CAPABLE.
-UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk


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 Post subject: Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
PostPosted: Thu Jun 15, 2017 9:05 am 
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Joined: Tue Dec 14, 2010 10:10 pm
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Brett928S2 wrote:
rajg wrote:
Hi all, just getting my 928 running in after its been stood for 3 years. I've noticed it puffs of grey smoke at high revs roughly at 3,000 or when driving and revs over 3,000rpm. At idle its perfect with no smoke. I've just given her a oil filter/oil change using 5/40.

I did run her at low revs just to run her in after been stood.

Any suggestions?


Hi :)

Umm your oil is too thin...

Change it again for either 20/50 or I use 15/50 Full synthetic...

I tried 0/40 when i got mine and had exactly the same smoke problem....

05/40 IS FINE if you run a modern 911... but our engines were never designed for an oil that thin...its going past the rings and valve stem seals...

And more revs...more smoke...


All the best Brett :)


Thanks Brett, Just to ask is there any breather pipes I would need to look out for for blockages, leaks for filters that could be clogged?


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 Post subject: Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
PostPosted: Thu Jun 15, 2017 9:18 am 
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Joined: Mon Nov 05, 2007 4:15 pm
Posts: 2411
Location: BOURNEMOUTH
rajg wrote:
Brett928S2 wrote:
rajg wrote:
Hi all, just getting my 928 running in after its been stood for 3 years. I've noticed it puffs of grey smoke at high revs roughly at 3,000 or when driving and revs over 3,000rpm. At idle its perfect with no smoke. I've just given her a oil filter/oil change using 5/40.

I did run her at low revs just to run her in after been stood.

Any suggestions?


Hi :)

Umm your oil is too thin...

Change it again for either 20/50 or I use 15/50 Full synthetic...

I tried 0/40 when i got mine and had exactly the same smoke problem....

05/40 IS FINE if you run a modern 911... but our engines were never designed for an oil that thin...its going past the rings and valve stem seals...

And more revs...more smoke...


All the best Brett :)


Thanks Brett, Just to ask is there any breather pipes I would need to look out for for blockages, leaks for filters that could be clogged?



Hi :)

Not really..a blocked air filter wouldnt help or oil filter but thats it really...

All the best Brett :)

_________________
928S2 AUTO V8 4.7 1986-XPIPES ANDERSON RACE EXHAUST,K&N, WIZARDS OF NOS MAXX RACE CONTROLLER & WON RACE REVO NITROUS KIT 2000 HP CAPABLE.
-UK 928 1/4 Mile and Top Speed Record Holder-208.10 mph- Email managingdirector@pchealthcare.co.uk


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 Post subject: Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
PostPosted: Sat Jun 17, 2017 3:01 pm 
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Joined: Tue Dec 14, 2010 10:10 pm
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Thanks Brett...will swap oil out.


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