Classic cars forum & vehicle restoration.

[Martin A]

Peter, Thank for that information. This brings me round full circle. Can you suggest where I can get suitable gaskets for the inlet manifold, or can you confirm they can be made out of gasket paper?

I have been told that Zephyr inlet manifold gaskets cannot be reused, so I don't want to take the inlet manifold off until I have suitable replacement gaskets in my hand.

I don't have any means for testing the compression. But I see from Ebay that compression testers are not expensive - maybe I should send off for one.

Martin

[Peter_L]

[Martin A]

Thank you Peter for that useful information. I will send off for a compression tester.

It is possible that the problem has been resolved.

Early this evening, I remembered that, with a Zenith VIG carb, the active part, with all the jets, the float, and the accelerator pump, can be removed by simply undoing two bolts. So I realised that, with a second carb available (except for a missing external part) I could swap the active part in a couple of minutes. In effect, a complete carb swap, so far as most of the functions of the carb are concerned.

I did the swap and then took the car for a couple of circuits round a 2-mile country route. Once the engine was warm, and with the choke control pushed all the way in, not a single backfire through the carb. Too early to pronounce the problem definitely solved, but looking quite hopeful.

I won't have the chance to drive the car for a week or so now, but once I have been able to verify whether or not the problem really has been resolved, I'll come back here and post a report.

Martin

[D4B]

Hi Martin,

Not sure if this is at all relevant to your problem, but my Land Rover 2.25 petrol with a Zenith 36IV carb would only run half decent with the choke knob pulled out a touch.....

So after reading various threads about this problem, I set about rebuilding the carb, in particular, sanding the carb halves flat on a piece of glass.

Runs lovely now!