Bulkhead loom rubber

[Cookie807]

Hello again, please does anyone have any tips on that little piece of rubber with a hole in it that SOME HOW I’m supposed to get my new wiring loom through, also does the three screws that hold the rubber securely in place go through the holes and screw directly through the same bracket but on the inside. Someone told me there’s only one on the bulkhead in the engine bay, but I got two in the kit so believed two have to be fitted.
Once again many thanks Rob

[les]

Yes it’s a rubber grommet, and there is only one. I’m trying to visualise the assembly, I believe the grommet is compressed between the two parts you have, then the whole item is screwed to the bulkhead. Might be a plan to pass the wiring harness through before screwing in place, you’ll have to see.

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[simmitc]

The grommet, like the plates (there are two, one each side of the grommet), is split so that it just slips over the harness in the correct place, no need to thread it. It is then clamped between the plates and the screws pass through both plates and then secure into the bulkhead. Feed the harness through the bulkhead before trying to fit the grommet assembly. The split in the grommet should not align with the splits in the plates, and the plates should be set so that their splits do not align either. See diagram https://www.moss-europe.co.uk/en-gb/wir ... 16--16--01

[les]

Yes, you’re right, I’m just wondering if the rubber in the ‘kit’ unlike the original, is a one piece affair. Going by the OPs description, as a piece of rubber with a hole in it. However, thinking about it, my previous remark of passing the loom through would probably be impractical considering the complexity of the harness, therefore if the grommet is not split, a sharp knife should be employed!

[Cookie807]

Great info guys, and a great help, the rubber grommet does not have any groove around the outside to sit halfway inside the bulkhead it’s simply a small rubber donut, the two holding plates are identical so an not be on the same side of the bulkhead, I’m assuming one must be inside and held with the same screws.
Thanks again Rob

[philthehill]

The three parts - that is the split plate, the split doughnut and the second split plate fit on the engine bay side of the bulkhead.
None of the parts are required to be fitted inside the car.
The rubber doughnut is held between the two split plates and the whole assembly is screwed to the bulkhead with the three screws.

[geoberni]

This post is most interesting....
I went through the Parts Lists for Cars and LCVs, and both appear to illustrate a single 'Cap'.

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The Car list calls it 'Cap - grommet retainer to dash'',
while the LCV list calls it 'Cap - ferrule retaining'.
You'd think they could use a common description. ESM call it 'Metal Cover For Wiring Loom Grommet'. All sources have it as Pt No AAA1891.

Both Car and LCV Parts Lists do say that Quantity 2 are fitted, as does ESM, but unsurprisingly for my car, there's only one.....

If I'm right in my thoughts that the loom was fitted around 1999/2000, it's been like it around 25 years, so it can wait a while longer...

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[Cookie807]

Great illustrations, and many thanks for the explanation. I’ve done a little research but there does seem to be some contradiction between different illustrations but it’s great to see and hear about other owners opinions.
Many thanks Rob

[Cookie807]

Hi all,
Just a quick note on my progress with the wiring loom,
Had a great idea to roll the grommet up a tapered punch I have then rolled it onto a steel short steel tube then removed the punch to leave the grommet on the tube, then patiently threaded the loom in a certain sequence to get the grommet in situ where it was needed.
It’s probably been done thousands of times but it was in my opinion the only way possible.


Please see the pictures attached

[simmitc]

As explained previously, you do NOT need to thread the loom through the grommet, the grommet is split. It's a couple of seconds to wrap the grommet round the loom.

[philthehill]

Talk about making extra work for oneself.
Looking at the photos above - you have totally the wrong grommet.
Get the right parts and the job is easy.
This is the grommet you need for the job:-
https://www.morrisminorspares.com/elect ... ad-p829865
The split grommet sits between the two split metal washers
which are screwed to the bulkhead.
https://www.morrisminorspares.com/elect ... 91-p829866

[Cookie807]

Hi Phil, firstly I don’t agree regarding totally the wrong grommet, it is actually the grommet in you link, and when it arrived it was just not split, but after talking to other Morris minor enthusiasts, they all agreed that splitting it is NOT the way to correctly fit it but it is the easiest way.
Wanting to do things correctly I thought is was a good idea, and just wanted to share it, after all it probably only took an hour.
You can see the same grommet on my invoice

Many thanks for sharing your comments.

[philthehill]

I have to disagree with your Morris Minor enthusiasts.
Whilst the ESM grommet when it arrived was not split the original bulkhead grommet BMC Pt No: AAA1501 was split.
The genuine BMC bulkhead grommet that was fitted to my Minor was split from new.

[Cookie807]

Yes Phil ok, I understand what you’re saying, but you actually said I’ve totally bought the wrong grommet, “It isn’t and I’ve put in on correctly.
Once again many thanks

[les]

The pictures in the links show the grommet split, enlarge it and look carefully, you will see. So I’m surprised that one was received not split. I can only assume the pictures are of the original split grommet but the stock, like a lot of things now, are not as they should be. To recap, if you want it correct, the grommet is split and encapsulated within two split metal plates screwed to the outside of the bulkhead with three screws. The split in the grommet is self explanatory, ie to fit around the harness easily, the original production line would demand it be quick. However is someone chooses a different approach, fair enough. I just wanted to state the correct components and fitting.

[StillGotMy1stCar]

The three parts - that is the split plate, the split doughnut and the second split plate fit on the engine bay side of the bulkhead.
None of the parts are required to be fitted inside the car.
The rubber doughnut is held between the two split plates and the whole assembly is screwed to the bulkhead with the three screws.

Intrigued by this, I’ve just checked my 1970 Pickup with original loom and the grommet is not fitted as you would expect a grommet to be fitted, it is in fact a split doughnut and is fitted exactly as described above by Phil.
The loom cover is the correct colours and I like your paint work, vans look very nice in green.

Regards John

[simmitc]

So all exactly as I wrote in the 2nd reply to the OP at the top of the thread. I am in complete agreement with Phil. If the grommets currently being shipped are the wrong part, then I can understand why some people may get confused. However, rather than using cones and tubes and spending ages on a job, for anyone now reading this topic, may I suggest that a good pair of scissors or a sharp knife will solve the problem.

[les]

I thought MY 2nd reply mentioned a knife ! Seems the OP is happy anyway, so ( and as it’s not on my car) everything is fine !
I’m the proud owner of an original split grommet !

[Cookie807]

Hi all,
just got home from the South Cheshire Morris minor meeting at Blakemere, spoken to many people regarding this issue about the mentioned grommet, that I have completed three days ago, and in my opinion I’ve done a great job.
All the Moggie guys I explained the issue to said “if they were in my situation (installing a new loom) they would have done exactly the same” and if they we’re replacing a perished grommet then obviously you would not pull all the loom out to put the loom through it.
Two guys also said the picture at ESM is only for illustration purposes, because if you are renewing the loom you certainly don’t want a split grommet.
So to conclude I think we’re all right, but it’s the situation that determines whether you want a split or not in your grommet
Have a great day