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928 '83 4.7 puffs grey smoke at 3,000 + revs
https://forums.tipec.net/viewtopic.php?f=27&t=22715		 Page 1 of 1
Author:  rajg [ Wed Jun 14, 2017 9:16 pm ]
Post subject:  928 '83 4.7 puffs grey smoke at 3,000 + revs
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?
Author:  Brett928S2 [ Wed Jun 14, 2017 10:35 pm ]
Post subject:  Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
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 :)
Author:  rajg [ Thu Jun 15, 2017 8:05 am ]
Post subject:  Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
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?
Author:  Brett928S2 [ Thu Jun 15, 2017 8:18 am ]
Post subject:  Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
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 :)
Author:  rajg [ Sat Jun 17, 2017 2:01 pm ]
Post subject:  Re: 928 '83 4.7 puffs grey smoke at 3,000 + revs
Thanks Brett...will swap oil out.
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