Smoky exhaust

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SamMorris2019
Newbie
Posts: 4
Joined: Wed Jun 17, 2020 7:26 pm
MMOC Member: Yes

Smoky exhaust

Post by SamMorris2019 »

Hello. I have blue smoke from my exhaust. I know its caused by excess oil being burnt. I have an small oil leak from the manifold to downpipe connection and where the exhaust clamp meets, small amounts of oil can be found around it. Any suggestions.?.
SteveClem
Minor Legend
Posts: 1904
Joined: Sun Jul 03, 2011 11:37 am
Location: Near Belper
MMOC Member: Yes

Re: Smoky exhaust

Post by SteveClem »

Is it just when you start the car, or continually smoking?
SamMorris2019
Newbie
Posts: 4
Joined: Wed Jun 17, 2020 7:26 pm
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Re: Smoky exhaust

Post by SamMorris2019 »

Its as soon as I start the car, when its idling and when its reving 😭
myoldjalopy
Minor Legend
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Joined: Tue Jan 29, 2013 10:32 pm
Location: Kernow
MMOC Member: Yes

Re: Smoky exhaust

Post by myoldjalopy »

A smoky exhaust is usually a sign of cylinder bore or piston ring wear. Compression test would be useful. If you get a low reading which increases after putting a teaspoon of oil down the plug hole and re-testing suspect worn rings. If not, maybe valves sticking or leaking. Presumably the car is using a lot of oil?
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