[Healeys] high oil consumption

[Bob Spidell]

re: "Some did say they say a "little black smoke, occasionally"."

That would indicate a rich mixture; if so, some unburned gas might be 
getting past the rings and diluting the oil, making it even thinner.  
Certainly, a compression test is called-for.

On 9/17/2019 7:48 AM, warthodson at aol.com wrote:
> Bob,
> The owner is aware of the issues with oil & I think he is using 20w/50 
> Castrol synthetic oil. I will confirm at the meeting. On the trip to 
> Conclave no one noticed any thing unusual about his exhaust. Some did 
> say they say a "little black smoke, occasionally". I will be 
> interested in seeing the plugs. If not rings, how else could oil be 
> getting into the combustion chamber?
> Perhaps the valve stems could be leaking. How could we test for this? 
> How about valve stem seals leaking?
> Gary H
>
> -----Original Message-----
> From: Bob Spidell <bspidell at comcast.net>
> To: healeys <healeys at autox.team.net>
> Sent: Tue, Sep 17, 2019 9:22 am
> Subject: Re: [Healeys] high oil consumption
>
> What brand/viscosity oil is he using?
>
> If it really isn't leaking it can only be burning it; I'd expect quite 
> a bit of blue smoke out the tailpipe.  My BJ8's engine was rebuilt a 
> couple years ago and uses some, less than this one, but isn't leaking 
> it--I was under it yesterday--and I only get a little blue smoke after 
> a long downhill run in gear.
>
> Bob
>
> On 9/17/2019 7:16 AM, warthodson--- via Healeys wrote:
> Our local AH club will be checking a BJ8 for high oil consumption this 
> weekend. He says it is not leaking out. We will verify that when we 
> inspect it.
> He added 8 quarts of oil on the round trip to Conclave recently (2100 
> miles total). The engine was professionally rebuilt in 2011. The 
> engine builder has recently retired & moved to a Caribbean island so 
> we cannot contact him, true story.
> In 2012 he used 6 quarts of oil on a 5000 mile trip. About 2-3 years 
> ago I checked the compression, performed a leak down test & inspected 
> the spark plugs. Every thing was in the normal range.
> My question is: If the engine passes all the usual tests this weekend, 
> what are some of the unusual ways you have come across that could 
> cause high oil consumption & how would we test for them?
>
> Gary Hodson
>
>
>

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