Help! My classic car keeps stalling.
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- čas přidán 27. 01. 2024
- How to prevent stalling due to vapour lock in a classic vehicle. The example here is a Morris Minor, but the same techniques and solutions can be applied to almost any car of the period.
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Exhaust Wrap
www.carbuilder.com/uk/exhaust...
Heat Shield Sleeving
www.ebay.co.uk/itm/375088276440
HIFF44 Carb Spacer
www.minispares.com/product/cl...
A truly excellent video. Well filmed, edited and narrated. On such a lovely, clean Moggy too. Epic.
What a beautifully filmed, well made, instructional video. Reminded me of old school. NIce to have an old motor where you can actually work on it.
That was certainly a comprehensive belt & braces approach! I had exactly the same problem in my Series 2 but it was literally just the fuel vapourising in the fuel line (badly routed right past the manifold imo). I just used the reflective wrap technique on that section of fuel line and never had the problem recur in the last couple of years since I did it.
My 1960 Minor used to do that at junctions, red lights, etc., not due to vapour lock, but because it was knackered! New cars do it by design!
SUGGESTION (From experience). Worth thinking about is - BMC 'A' and 'B' series engines are supplied with fuel by an electric fuel pump (Moggie has it in the engine compartment (on engine bulkhead; see video), Oxford / Cambridge type cars have it in the boot). Because of wear and tear, (like the distributor) the points in the diaphragm-type pump wear and can cause intermittent fuel starvation similar to vapour-lock. You can hear the pump clicking as it builds-up pressure when first switching the ignition on. If you don't then tapping the body with a screwdriver handle should get it working again. You used to be able to buy replacement contacts but it would be by specialist outlets now.
Awesome like a moving picture Haynes manual except without the oily fingerprints.
Great video
It can also help to fit a small bore fuel return line off the SU float chamber back the tank, although this is a lot of work it helped on my twin SU Triumph engine to deal with the alcohol it was never originally intended to when sitting in traffic
Probably wouldn't have been a problem with the std mowog cast manifold.
This was also a problem with the similar Triumph 4-cylinder engines as used on the Dolomite, Herald and Spitfire. One reason is that modern unleaded petrol burns hotter than the old 4-star. Another fix is a heat shield between the inlet and exhaust manifolds. Ceramic coating of the exhaust manifold is also another option.
FUEL starvation due heat , obstruction in fuel flow .
Hopefully your cure works, however a more substantial heat shield could be created, using exhaust/catalytic converter heat shield from a scrap car. Easy to cut with snips and bend to shape. Should the pipe from the fuel pump to the carburettor not be flexible?
I don't know if your petrol in the UK has ethanol in it like many parts of the USA and here in South Africa. The vapour lock became so bad that i went to the electric pump route.
Did you use a gasket when installing the base plate?
Why didn’t you change the route of the fuel line ?
Malheureusement, l'ordonnance fédérale d'interdiction du contrôle des gaz d'échappement (BABVVO) interdira bientôt la conduite de moteurs à combustion en public en dehors des trajets domicile-travail et des transports prouvés, le contrôle des gaz d'échappement deviendra alors une infraction au code de la route.
what heat shield off and part no
Now my 1997 Toyota Hilux is carburated but don't have vapour locking problems because it has a cross flow cylinder head
Put an electric fan in front of the radiator =no over heating that causes vaporising of the fuel ( fan blows towards the engine)
Just stumbled onto your