Hi John
The mist is clearing (it was 10 years ago when I put it together).
Just had a look at my head and it is stamped 68422.
But this is a Wosleley 4/44 head - my original which is a 22952 was cracked so
I used this one. WosleleyXPAW engines are much more common in NZ than TDs so
not uncommon to see this. My block is original to the car.
I have another Wosleley head which I have just measured and it is 3/4"reach -
so that is why I have the 3/4"plugs! Anyway from what people say the 7ES is too
cold so I will go back to the B5ES plugs.
Cheers
Douglas
-----Original Message-----
From: John Seim [mailto:kingseim@earthlink.net]
Sent: Wednesday, 2 November 2016 12:50 a.m.
To: Douglas Ormrod <Douglas.Ormrod@Neurological.org.nz>
Subject: Re: [Mg-t] Post winter TD blues
Spark plugs are too cold.
Go to NGK B6HS. Verify that the cylinder head has 22952 cast into it, top
right, front. Should be able to be seen, next to valve cover.
You either have a stuck needle to seat, or a sunken float, or both. Remove
float bowl. Observe needle drops. Spray carb cleaner at needle and seat area.
Remove float, shake, listen for fluid in float. Do same with other float.
John Seim
Irvine, CA
USA
On Oct 31, 2016, at 6:21 PM, Douglas Ormrod wrote:
> Greetings from New Zealand
>
> Long-time no chat, but long-time no problems.
>
> My 51 TD has given very little trouble over the last 8 years, but now it is.
>
> It has had very little use over the last six months, it was winter and I must
> be getting soft. Perhaps 4 outing and 50 miles. Summer now here.
>
> Started OK at the weekend, but before I could take off it started running
> very rough - sounds like down to three or two cylinders and backfiring
> through muffler. Coaxed back into the garage on almost no power.
>
> Took out plugs (which were new six months ago) and they were covered in soft
> black soot. New plugs are NKG B7ES, old ones were NKG B5ES. Cleaned them up,
> also cleaned all distributer contacts, rotor contact, and took out cleaned
> and reset the points. Checked cables for tightness. Started easily and took
> it for a 10 mile run - apart from a little missing at first all seemed fine
> once it warmed up. Power as normal.
>
> Decided to take it work today (sun out), but same scenario, started and
> sounded OK, but after a few minutes ticking over started running very rough,
> backfiring and power gone almost gone. Plugs all black and sooty again and a
> couple of them quite wet.
>
> Only part of the ignition system that was not renewed at rebuild was the
> lucas sports coil - I did have it checked at the time.
>
> So any suggestions as to the possible source of the problem?
>
> Thanks in anticipation of your collective wisdom.
>
> Douglas
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