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South African engine


mcintbg
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Hope someone can help me.

I bought a replacement engine for my A, its a 1.9 from South Africa.

Looks identicle BUT when i come to swap the manifold the bolts dont fit.

The origional one has m8 bolts and the S.A. one looks like M10 but the thread seems tight when i put them in.

 

Are these the right bolts ????

 

TECHNICAL SPECIFICATION
Thread Size M10
Thread Diameter 10mm
Thread Pitch 1.50mm
Flange Diameter 21mm
Spanner Size 15mm
Length (L)

35mm

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3/8 BSF has the same pitch as M9, but has a slightly deeper depth.

We used to tap the manifold bolt holes in the head as it was easier to get 3/8 BSF cap head screws in the ‘80s to use with 4-2-1 manifolds 

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Got some M10 with a 1.25 pitch to try... no good

So M10 pitch 1.5 no good as well.

The M9 ones push straight into the holes.

I am a bit stuck what to try next.

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2 hours ago, mcintbg said:

Got some M10 with a 1.25 pitch to try... no good

So M10 pitch 1.5 no good as well.

The M9 ones push straight into the holes.

I am a bit stuck what to try next.

3/8 UNC perhaps ?

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