SE5A Project - Swindon

If you have a long-term project and would like to share/document progress, this is for you.

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gtcse8
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SE5A Project - Swindon

Post by gtcse8 » Sat Sep 21, 2019 5:58 pm

The Silent city. :lol:
OD is still available. :wink:
Indicator stalk, OR full unit ??. :?:
Rocking horse poo. :w
Enjoy your hols :D
Mark


Mark Wilson. See the Beast on youtube under" RELIANT SCIMITAR CONVERSION LOL.,Three Se5a, Se6a, Two Se6b`s,1 & 1/2 GTC`s & not a lot of sense
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Post by Rev Light » Sun Sep 22, 2019 3:23 pm

Sorry, just need the stalk as it is the horn swicth that is kaput.


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gtcse8
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Post by gtcse8 » Sun Sep 22, 2019 3:30 pm

I have a few dead units that the horn switch can be pulled off/repaired/replaced.
Hardest bit is the central wire for the contacts inside the knob at the end.


Mark Wilson. See the Beast on youtube under" RELIANT SCIMITAR CONVERSION LOL.,Three Se5a, Se6a, Two Se6b`s,1 & 1/2 GTC`s & not a lot of sense
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Post by Rev Light » Sun Oct 20, 2019 5:38 pm

So I have been slowly stripping my spare engine to take a look see what the 'funny noise' was that forced its removal from its previous home. The engine itself was, apparently a recent recon, with limited miles and good oil pressure. So I thought it might be worth the risk. Having removed the heads and pistons I was scratching my head to try and figure out what the issue might be. There was nothing obvious

The bores were, good, with cross hatching still visible, no discernable top lip and no scores.
The pistons were good, the big ends - barely any wear. The little ends - no discernable play.
Crank end float - minimum spec.

I spoke to Dave Peak at the Wiltshire Noggin this week, as he had heard the engine running with its issue. Dave seemed to recall that the 'knock' was not at crank speed , or even piston speed, so thought it might be timing?
Dave volunteered to come round today to take a look and check my sanity. Thanks Dave - its the first Essex I have stripped.

Having looked things over that I had already removed, we finally pulled the pulleys off so we could get to the timing wheel and look at the crank and cam. This is when we notice this nylon timing wheel. The crack in the nylon teeth that is clearly visible on the front of the wheel, is was almost all the way through to the back. The tooth to the left of the crack is mobile - slightly. This engine, was very close to a catastrophic failure.

This is the likely candidate for the 'noise' we think.

Why would you recondition an engine and leave one of these in place?

Cheers

Steve
Attachments
WP_20191020_10_14_38_Pro.jpg
10 minutes from total failure
WP_20191020_10_14_38_Pro.jpg (156.94 KiB) Viewed 823 times


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Post by willholderogri » Sun Oct 20, 2019 6:11 pm

That will be the noise lucky escape I reckon


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SE5A Project - Swindon

Post by philhoward » Sun Oct 20, 2019 8:34 pm

The only reason I can think for not changing the gear is that for some reason, sone people don’t think the nylon gears are an issue.


I think you’ve just escaped a rebuild of much more than a few gaskets by the skin of your teeth (excuse the pun)..


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Post by reliant-reviver » Sun Oct 20, 2019 9:11 pm

Well to be fair they aren't an issue... up until the point where they fail :roll:

If you haven't got a replacement gear already I can assist with supplying an alloy one whilst I still have stock.


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Post by Roger Pennington » Sun Oct 20, 2019 9:26 pm

Wow, that certainly was a narrow escape! :shock: It should serve as a salutary warning to others.


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Post by Old and Slow » Sun Oct 20, 2019 9:45 pm

Very rare to get a picture of how the teeth are going to fail. Must be one in a million - I'd buy lottery ticket this week too!


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Post by Rev Light » Tue Oct 22, 2019 12:01 pm

Not sure if you can tell in the picture, although I did allude to it, but the nylon band, underneath tooth to the left of the crack, has come away from the metal subassembly. The failure mode, as far as I can see, is that the nylon band will come unstuck underneath the next tooth, etc. until there is enough 'flapping around to jam up and break off. At this point, the rest of the teeth are likely to be shredded as the valves and pistons lose sync and come to blows.........

Cheers

Steve


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