V6 essex timing gear

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V6 essex timing gear

Post by philhoward » Mon Apr 15, 2019 9:16 pm

Sounds like you have the later nylon tooth gear. Not quite as fragile as the early “fibre” gear but still at risk as instead of “just” shedding teeth, the outer ring tends to come off in many bite sized pieces. The end result is the same - anywhere from no damage (rare) to needing a full set of valves, guides and pushrods and their guide plates - or anything in between.


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Post by Stoddy » Mon Apr 15, 2019 10:49 pm

Thanks for your advice. I have history for the car back to 2004 and can't see anything suggesting it's been replaced since then so I'll get a steel set ordered. Is there anything else I should look to replace at the same time while the front of the motor is apart?



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Post by Roger Pennington » Mon Apr 15, 2019 10:53 pm

As well as the gaskets for the front cover and sump, it's worth checing that the kit includes a crankshaft front oil seal, as it's in the front cover, so worth changing while it's off.


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Post by cannonball » Mon Apr 15, 2019 11:46 pm

Are there any warning signs of timing gear immanent doom? Just wondering.



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Post by Roger Pennington » Mon Apr 15, 2019 11:56 pm

cannonball wrote:
Mon Apr 15, 2019 11:46 pm
Are there any warning signs of timing gear immanent doom? Just wondering.
No, not usually; the first signs of it happening, are when it happens. :(


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V6 essex timing gear

Post by philhoward » Tue Apr 16, 2019 6:43 am

cannonball wrote:
Mon Apr 15, 2019 11:46 pm
Are there any warning signs of timing gear immanent doom? Just wondering.
As Roger says, it’s purely luck. Certain things can make it more likely to fail (lack of oil changes, overheating), but there no warning signs. It will fail at some point - could be tomorrow, could be in another 20 years, could be in another 40.


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Post by willholderogri » Tue Apr 16, 2019 7:53 am

I agree no warning at all mine went at 60000 miles


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Post by cannonball » Tue Apr 16, 2019 9:53 am

That's very scarey, I had better check and see what's hiding behind that casing.



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Post by willholderogri » Tue Apr 16, 2019 10:47 am

Worst bit is cleaning all the teeth out of the sump


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Post by willholderogri » Tue Apr 16, 2019 10:47 am

Oh and the bent valves one on each cylinder head


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Post by Nick » Tue Apr 16, 2019 11:34 am

As an aside, it is interesting that many modern engines (my MR2 for example) have non interference valve gear, i.e. if the cam belt breaks valves do not meet pistons, whilst most old engines do! Progress I supose.


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Post by Roger Pennington » Tue Apr 16, 2019 12:22 pm

While it does sound scary, it's perhaps worth mentioning that it's no different to the cam drive belts used on a high proportion of modern engines, and at least in our case, there is a totally effective preventative solution, whereas with a cam belt there's nothing you can do except keep on changing it regularly.


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Post by willholderogri » Tue Apr 16, 2019 12:51 pm

Nick wrote:
Tue Apr 16, 2019 11:34 am
As an aside, it is interesting that many modern engines (my MR2 for example) have non interference valve gear, i.e. if the cam belt breaks valves do not meet pistons, whilst most old engines do! Progress I supose.
I thought it was the other way round most old vehicles were non interference and a high proportion of new cars were .side valves are definitely non interference


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Post by philhoward » Tue Apr 16, 2019 12:58 pm

Not many modern (<30 years old) engines are non-interference - your MR2 is the exception rather than the rule, Nick.


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Post by Penfold13 » Tue Apr 16, 2019 10:40 pm

Hello,

I ordered my timing gear from www.essexengines.com having seen a reference to it somewhere on here and they were very helpful on the phone. Got plenty of advice including take the opportunity to change some of the engine plugs whilst I had the cover off. Price was good for the gear (get both in the kit, plus all gaskets and seals) just waiting for the bits to arrive now.

Burton no longer do alloy gears, only steel like most other places that I found.

Thanks again,
Chris


‘72 SE5A

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