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Pete merritt
Pete merritt's picture
Last seen: 2 months 1 week ago
Joined: 13/04/2021
Blue exhaust smoke

My 1991 xflow puffs blue smoke when started hot. I live in Bournemouth and suspect there’s engine work to be done. Any advice and recommendations greatly appreciated.

jonsymons's picture
Last seen: 1 hour 49 min ago
Joined: 15/09/2020

Pete - worth doing an oil change to something like a Millers 20/50 Pistoneeze? Won't fix anything mechanical but might at least put off the expense for a while...

Wrightpayne's picture
Last seen: 7 min 6 sec ago
Joined: 17/04/2014

Do they have valve guide oil seals?

Englishmaninwales's picture
Last seen: 1 day 6 hours ago
Joined: 17/04/2014

Or even Millers 20/60, it reduced the smoke at start up on my twin cam, putting off the new valve guides for a bit.

AnkerB-S's picture
Last seen: 3 weeks 5 days ago
Joined: 14/11/2019

The original valve seals are junk. Burton Power has better seals and they are easy to change once the cylinder head is off. There are two sizes and Burton can help you figure out which size is the right one for you.

A compression and leak down test should be done first.

Anker Berg-Sonne
Stow, Massachusetts

Old fart pretending that age is just a number

1987 Caterham Super 7 1700 Supersprint
2004 Porsche Boxster S
2009 Mercedes CLK 350 Cabriolet

Beagler's picture
Last seen: 4 min 6 sec ago
Joined: 24/07/2021

If bore wear is not too bad we used to fit 2.5 or 5 thou oversized pistons. They were lapped in upside down with a handled flat steel attached to gudgeon pin.  Engine In situ .We used Ajax and oil. The engine was quite tight on startup but if they were run at intervals carefully on idle till they freed up a little they were cracking engines and lasted.


what mileage has the engine done.

2019 310S 1.6 Sigma