[Healeys] high oil consumption

[Kees Oudesluijs]

I would check the crankcase ventilation first. Dismantle and see if it 
is blocked or dirty. Clean or renew and refit.

On some of the cars there is a diaphragm in the crankcase ventilation 
system fitted between valve cover and inlet manifold under a spring 
loaded disc that you can remove. Perhaps the diaphragm is split.

Also check the accuracy of the dipstick. If an engine is overfilled with 
oil it will often consume a fair bit of oil until the oil level is normal.

If the car emits blue smoke continuously when accelerating hard: worn 
rings/pistons/bores.

If the car emits blue smoke momentarily when accelerating after 
decelerating on the engine: worn valve guides or seals.

Kees Oudesluijs


Op 17-9-2019 om 16:16 schreef warthodson--- via Healeys:
> 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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