 | Home > Tdi > 200tdi turbo to manifold studs |
 
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3414   
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I believe they are M8 x 25. Standard nuts, no nylocks.
One thing I will advise is not use stainless. Its weak. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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20th Nov 2024 2:42pm |
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| Blue Blood Member Since: 14 Jun 2022 Location: Shropshire Posts: 122  
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Thanks for that, really appreciate it.
I wanted to use stainless but as I say not just 304 (which is your A2 grade) but more over 316 (marine grade which has much better strength properties). |
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20th Nov 2024 2:51pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3414
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Actually both 304, or as you well said A2, and 316, A4 grade, both come in either 70 or 80, which is their respective tensile strength. The 80 is less common, and is still almost half the strength of a 10.9 bolt/stud.
Stainless steel is prone to galling, and while a steel bolt may seize due to rust, stainless may seize due to galling. When I was younger and less knowledgeable about materials (not that I am now), I mounted my alternator with stainless steel bolts. Needless to say, it fell off, although did take a few years to happen. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing 2012 90 CSW, 2.2TDCI, Santorini Black |
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20th Nov 2024 6:29pm |
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| Blue Blood Member Since: 14 Jun 2022 Location: Shropshire Posts: 122
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What about something more exotic like grade 5 titanium?
I’ve found a chap on fleabay that sells some but didn’t know if the size would be alright: https://www.ebay.co.uk/itm/114056592306 |
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20th Nov 2024 9:12pm |
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| Dinnu Member Since: 24 Dec 2019 Location: Lija Posts: 3414
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No experience with titanium. 1988 90 Hard Top, 19J Diesel Turbo, Shire Blue - Restoration ongoing
2012 90 CSW, 2.2TDCI, Santorini Black |
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21st Nov 2024 6:31am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17414 
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What's wrong with the standard studs? Have you actually had difficulty with them in the past?
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21st Nov 2024 8:20am |
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| Blue Blood Member Since: 14 Jun 2022 Location: Shropshire Posts: 122
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I haven’t but the chat, but sometimes helps me out on my engine bits and bobs has. I think it’s just a case that I’d like to try and future proof as much as possible and I know I could use copper grease and other various bits and pieces but if I can try and mitigate Any potential problems by future proofing I’ll always try. I do intend to keep my truck for a very long while
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21st Nov 2024 8:26am |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17414
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Over the years I have had no issues with standard studs (on any vehicle of any type). Agreed that they do sometimes need replacing during overhauls, but the only actual failure I have ever had was a warped TD5 manifold shearing one stud on my Disco2. That would have happened earlier with stainless since it has a lower tensile strength, and removing the broken stud would probably had been more difficult.
My personal choice for manifold studs is always to stick with standard materials, they do the job and are a known quantity. I have had many problems with stainless fasteners (especially on my Patriot rack) and actually hate the things with a passion! |
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21st Nov 2024 11:27am |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5720 
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At least with a normal stud they can be cut, and drilled out with ease if anything does go wrong.
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21st Nov 2024 11:40am |
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| Blue Blood Member Since: 14 Jun 2022 Location: Shropshire Posts: 122
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Hmmm I think guys may be right. I just hear horror story’s of getting the studs out or the nuts off the studs.
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21st Nov 2024 11:48am |
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| landy andy Member Since: 15 Feb 2009 Location: Ware, Herts Posts: 5720
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I would definitely recommend GOOD quality nuts, there is a big difference in what you can get.
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21st Nov 2024 12:01pm |
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| Blue Blood Member Since: 14 Jun 2022 Location: Shropshire Posts: 122
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Do you have any you’d recommend? Or material type?
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21st Nov 2024 12:05pm |
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| blackwolf Member Since: 03 Nov 2009 Location: South West England Posts: 17414
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I used Wurth studs on my TD5.
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21st Nov 2024 12:08pm |
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| Mo Murphy Member Since: 01 Jun 2008 Location: Letchworth Garden City, Herts Posts: 2235 
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Mild steel studs and flanged copper nuts are used in other exhaust type applications.
Mo The Land Rover 90 - Many are called, few are chosen. 50 Shades of Pennine Grey |
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21st Nov 2024 12:25pm |
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