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Evil Elsie

Member Since: 25 Feb 2023
Location: Cumbria
Posts: 226

Exhausted

Hey folks,
Currently got the exhaust manifold sitting on my bench. It's not warped but has all of the webs intact. Before I refit it, is it worth running a hacksaw down the webs...??

Cheers, Dave. 2002 Land Rover 110 Td5 Utility

1980 Yamaha RD 350LC
1976 Yamaha RD 400C

14th Oct 2025 4:18pm

blackwolf

Member Since: 03 Nov 2009
Location: South West England
Posts: 18017

2007 Defender 110 Puma 2.4 DCPU Stornoway Grey

I'd say that it is worth dewebbing but there's more to it than you suggest if you want to to a good job. Ideally you will remove the entirety of each web and smooth the manifold to remove any stress-raisers, so the when you finish it looks as though there never was a web. You will need more than a hacksaw for this.

If, as I infer from your post, you simply cut a slot in the web you greatly increase the risk of the manifold cracking.

14th Oct 2025 5:40pm

Evil Elsie

Member Since: 25 Feb 2023
Location: Cumbria
Posts: 226

Thank you very much - a couple of quick hacksaw cuts was exactly what I was thinking of...
You've saved me a great deal of trouble. Now, do you know anything about removing snapped drills from exhaust manifolds...😄
'cos that's what I've just done, trying to drill out a sheared bolt on the EGR blank....

It's been one of those days....😢😢😢😁 2002 Land Rover 110 Td5 Utility

1980 Yamaha RD 350LC
1976 Yamaha RD 400C

14th Oct 2025 6:09pm

Mdm

Member Since: 11 Sep 2013
Location: Sunny Lancashire
Posts: 1681

as above some folk say leave well alone and some say slot with a big grinding disc.

we tend to find total removal is best option and then a coat of heat resistant paint .

for broken drill bit removal. a small hole saw can work.

as can a decent set of extractors, all depends how much you can grab onto

14th Oct 2025 6:55pm

landy andy

Member Since: 15 Feb 2009
Location: Ware, Herts
Posts: 6043

2006 Defender 110 Td5 USW Zermatt Silver

I go for total removal.

Click image to enlarge

14th Oct 2025 7:02pm

Evil Elsie

Member Since: 25 Feb 2023
Location: Cumbria
Posts: 226

Thanks Gents - appreciated 👍

I'm going to leave it alone (apart from the bloody drill bit🤬) - it's nearly 24 years old and covered 179k miles - it doesn't need my ham-fisted attempts to 'improve' it... 😁😁

Cheers, Dave 2002 Land Rover 110 Td5 Utility

1980 Yamaha RD 350LC
1976 Yamaha RD 400C

14th Oct 2025 9:16pm

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