Date: Mon, 19 Oct 2009 16:20:20 -0700
Reply-To: Bill MacLachlan <billmacla@GMAIL.COM>
Sender: Vanagon Mailing List <vanagon@gerry.vanagon.com>
From: Bill MacLachlan <billmacla@GMAIL.COM>
Subject: Re: oil pressure diagnosis.
In-Reply-To: <BAY132-DS5CAB09444B6B572928538A0C10@phx.gbl>
Content-Type: text/plain; charset=ISO-8859-1
Thanks Dennis....they did guides & seals too, so I'm hoping the oil
consumption issue is resolved.
Their analysis was that oil use was due to sludged up rings not moving
right. Therefore they replaced rings and con rod bearings.
Shops first answer to the oil light was that it was a sensor ( " they can be
sensitive"), but then they used a pressure gauge - pressure low at idle, OK
at running speed. Not sure how warm the motor was when they read the
guage.
Thaks for the info on the pump, and the inlet screen. I'm thinking the
inlet screen may be dirty or the pressure relief may be gummed open. This
would be the sort of non culpable careless stuff I've run into with work
they've done. Sigh. No I won't use them again.
Engine load is minimal and I don't rev it.
Bill M
On Mon, Oct 19, 2009 at 3:55 PM, Dennis Haynes <d23haynes57@hotmail.com>wrote:
> Excessive oil consumption on these engines is usually the result of bad
> valve stem seal and/or worn guides. You need to confirm hot idle oil
> pressure with a gauge. May only be a bad sensor. Rarely do these oil pumps
> wear out but a sludged up or other dirty engine can clog the pump inlet
> screen. Usually these engine will run fine on 10w-40 unless you are getting
> things really hot form hi revs or high load. Also be careful that the oil
> level is not too high.
>
> Dennis
>
>
> -----Original Message-----
> From: Vanagon Mailing List [mailto:vanagon@gerry.vanagon.com] On Behalf Of
> Bill MacLachlan
> Sent: Monday, October 19, 2009 6:26 PM
> To: vanagon@GERRY.VANAGON.COM
> Subject: oil pressure diagnosis.
>
> Hi all, I need a little bit of list wisdom/feedback here.....
>
> Just over a year ago I had a local shop put replaced my worn out I4 motor
> with a used one.
>
> The one they installed has been a lemon.
>
> Shop has just replaced rings and con rod bearings because the engine they
> put in was burning 0.5 litre of oil every 300 miles.
>
> Now when the motor is warmed up , the oil light's on at idle - wasn't
> before, but now it is. The only change has been the rings & bearings.
>
> Raise the revs 50 rpm and the oil light is off. Shop says oil pump's worn
> -
> low pressure at idle, but OK above idle - 60 lbs. @ 3000 rpm
>
> I wouldn't be surprisd if the oil pump is worn, but I'm also thinking
>
> (1) oil weight too thin- should be 20/50 not 10/40
> (2) is this a symptom of worn main bearings too? It wouldn't surprise me.
>
> any thoughts welcome... it'd be good to hear your opinions....
>
> Bill M
> 82 I4 GL
>
>
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