Tom,
You can be defected for smoke, usually you'll know yourself if it's bad
enough. There used to be a 3 second rule in place years ago when you took
off from the lights, oil smoke will attract the police to the car in the
first place as I've found that's not usually the only thing wrong with it.
Most Datsun heads wear in the valve guides after about 140' klm and you can
replace the seals but these don't last as long as the originals and guide
replacement is fairly expensive so most of us never get it done. We can
change the guide seals in a morning so that's what we prefer to do. Some
oils burn a lot easier than others and are good for 3-4' klms then fall
apart, you could change you oil brand and see if that helps and of course
there are the additives which imho are a waste of money - can good for a
temporary fix if you've got a rwc inspection.
In closing I think Nissan Japanese oil rings are crap as they prematurely
collapse but if you use Hastings, Total Seal or similar the problem with oil
rings goes away for good as they will outlast the compression rings.
terry
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED]]On Behalf Of Tom Richardson
Sent: Saturday, 16 September 2000 11:41 AM
To: [EMAIL PROTECTED]
Subject: The mystery cam and engine wear
The guy at Wade gave me some more people to ring up so it's gonna lead
somewhere I hope hehe thanks for providing a starting point tho Errol :)
I'll post the lobe height and width as soon as I remember these calipers!
Thanks for the advice on the oil burning too! Does anybody know if the can
police book or defect for burning oil like that?
Thanks
- Tom
----- Original Message -----
From: "Errol Smith" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Saturday, September 16, 2000 8:10 AM
Subject: Re: Engine wear
> Tom,
> If there is only smoke during the changes it may just be a bit of guide
> wear and stems seal on the valves. As you back of the throttle to change
> gear, oil is sucked down the guide into the inlet tract. At partial
> throttle or better there is insufficient vacuum to pull the oil into the
> inlet tract. I would do a leakdown test on the engine to check rings etc
> and if that was OK dont worry about it unless the smoke is more than a
> slight tinge of blue as it is just a symptom of an older engine with a bit
> of wear. It also provide some upper cylinder lube!
> Cheers
> Feral Errol
>
> ----------
> From: Tom Richardson <[EMAIL PROTECTED]>
> To: [EMAIL PROTECTED]
> Subject: Engine wear
> Date: Friday, September 15, 2000 11:12
>
> Hi list
>
> Could somebody please offer a diagnosis on my L18? It blows a decent puff
> of smoke during gearchanges if driven hard-ish (changing at 5000rpm).
> Otherwise not smokey at all. What is likely to be wrong and what would it
> cost to fix?
>
> Thanks!
>
> - Tom
>
>
>
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