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MG parts spares and accessories are available for MG T Series (TA, MG TB, MG TC, MG TD, MG TF), Magnette, MGA, Twin cam, MGB, MGBGT, MGC, MGC GT, MG Midget, Sprite and other MG models from British car spares company LBCarCo.

MG TD TF 1500 - Correct Mark II Carbs Available

I have a set of completely authentic re-manufactured 4031 carbs available, if anyone with a Mark II has the wrong carbs. I could also work out a part-exchange, if your correct carbs are worn out.

Tom Lange
MGT Repair
t lange

Tom, Early or late 4031s? Hope they go back on a TD/c / MK II.

Bill Chasser

TD-4834
W. A. Chasser

See your email, Tom. Thanks!
Kevin McLemore

Bill - I have one set of early, and one set of late.

Tom Lange
MGT Repair
t lange

Hi Tom, what is the difference between the early and late 4031 carbs?
Hugh Pite
H.D. Pite

Mark II cars all used the 4031 H4 1-1/2" carbs. Early Mark IIs used the 1-1/4" air intake manifold (snorkel) but the smaller bolt holes of the snorkel did not fit the larger flange bolt spacing of the 4031. (Nor did the small snorkel help breathing - read Tom McCahill's diatribe in Mechanix Illustrated...) To make the early snorkel fit the larger carbs, at the factory the carb flange bolt holes were enlarged with a round file (often roughly) inward, to an oblong shape. The earlier 1-1/4" air intake manifold bolts then fit. Earlier cars also used the 1-1/4" intake manifold, bored out (again, often roughly) to fit the larger carbs.

Later cars used a re-designed and larger air intake manifold that had a revised bolt pattern, so there was no need to file the holes oblong. These later cars also used the later, dedicated 1-1/2" intake manifold, with bolts for the carbs (if you see one with studs, it came from a TF or TF1500).

Hope this is clear, and helps.

Tom Lange
MGT Repair

t lange

This thread was discussed between 21/03/2017 and 22/03/2017

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