What manifold - which screws?

transexl

transexl

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Guten Tag zusammen

I cannot help but feeling that my "Rover 3500 & 3500S Parts Catalogue", Part No. RTC9022B, dated September 1977, does NOT show the inlet manifold that I removed, glass bead blasted and sprayed clear :?

The two that are pictured within look different from Jimmys.
Whilst trying to work out what screws to buy (possibly stainless steel ones) for thermostat housing, coolant flange/underside pipe and choke light otter switch (have I missed out a thread into the manifold??) I feel VERY insecure.

The nomanclature itself is quite a piece of work for the average German mathmatics idiot ( :roll: ), but looking at a picture of a manifold that might be different apart from it having more threads and differing plugs and stuff is very confusing.

I am sure that otter switch screw 257064, REF.NO: 1122, that looks like it is about three milimetres wide and about five milimetres long is NOT "screw 10 UNC X 7/8 long", as 7/8 inch is some two centimetres long.
Besides which, the pic seems to show a blank plate where I removed the otter switch :shock: ,.. .

Can somebody shed some light??

DANKE!

s.
 
Hi, don't take the line drawing too literally for size comparison. Sometimes the manifolds
were machined for the switch but the vehicle they were going in didn't need it so a blanking
plate was fitted, maybe for such cars as Morgan or TVR for example. The manual date of
1977 was after P6b production was finished and they were already into SD1 production which
didn't have it either. Here is some information of the thread size. -

https://www.carbidedepot.com/formulas-tap-standard.htm

Colin
 
colnerov said:
Hi, don't take the line drawing too literally for size comparison
Click to expand...

Hey Colin,

I do not have the screws in hand, they´re with the car.
But this was the size from memory, not from the drawing - I did figure out that that would be pointless :wink:

What I did not think of is the SD1/Morgan i.a. - parts!
So the manifolds depicted might even be NEWER than Jimmy, not older as I thought :shock:

THANKS for that AND the link!!
Gonna study tonight and measure with the screws in front of me!!
 
Be careful with stainless fasteners into aluminium. They are at opposite ends of the galvanic spectrum and are known to have issues in each other's company.
Use a good quality anti-sieze with them or you will suffer later when removing things.
 
Hi John

That is the reason for me hesitating.

On my motorbikes I changed some screws to stainless, but left out e.g. the ones that go into the fork clamps, that are made of aluminium, as a mate of mine gave me the advise you give.
Is not the anti-seize a similar Problem? Until years ago it was copper paste for all and everything, and that brings another material into the galvanic mix, right?

I might just use the old, re-zinked screws - or new zinked ones - when going into the process.
 
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