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 Post subject: Re: occasionally smokey
PostPosted: Thu May 30, 2019 11:31 am 
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Joined: Thu Nov 10, 2016 10:01 am
Posts: 27
Location: sa
Before I did the valve stem seals I took out the pcv valve and added a catch between this and the other vent on the rocker cover, the catch can also had a vent on it. this unfortunately didn't change it at all. I put it back to standard.
When the oil cap is loose it does not "dance" at all, it is actually being sucked down if anything.

Oil wise, I ended up running a run in oil after I had smoke issues just to see if this would change anything (it didn't) so after 300 or so kms on this I dropped it again and tried a Caltex 10w30 oil which was even worse so dropped that and tried a Toyota 15w40 (I work for Toyota so have access to multiple grades of oil) this oil has improved the situation but since this I have done the valve stem seals.
So my question is which oil should I run for the best outcome in my situation or what should I try next other than set fire to it and walk away?


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 Post subject: Re: occasionally smokey
PostPosted: Thu May 30, 2019 9:32 pm 
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Joined: Mon Oct 12, 2015 11:30 am
Posts: 465
Location: Napier
Off gas downhill has a vacuum in inlet manifold, drawing oil from somewhere (most likely valve stem seals). Jumping on the gas then burns the oil in the combustion chamber. You obviously know this working for Toyota.

Either a seal is not seated or a guide is worn, causing the valve to move slightly, allowing in the oil. Sounds like its head-back-off time to check them all again.

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