Question for mechanics

If you are fitting a manifold and a new turbo do you use new bolts or reuse the old ones, a good mechanic I know will only use the proper new bolts , says the old ones can be pulled and might not stay tight.
 
New fixings, new gaskets, renew oil feed if applicable, renew renew renew now whilst it's in bits and you are already in there. It's not the sort of thing you want to push your luck with for the sake of a few quid.
The full story is I have a good mechanic doing a job on the fastrack , and he’s putting in all new bolts but I only got a new turbo fitted by a so called expert and 300 hours later everything came loose , we are lucky to escape major damage . The mechanic I have can’t believe that the old bolts were reused , he says that is a simple no go , and from the above comments all you good mechanics are on the same page. He’s redoing all the gaskets and fixings , hopefully it won’t loosen again. I’ll deal with the so called expert after.
 

jd6820

Moderator
Arable Farmer
The full story is I have a good mechanic doing a job on the fastrack , and he’s putting in all new bolts but I only got a new turbo fitted by a so called expert and 300 hours later everything came loose , we are lucky to escape major damage . The mechanic I have can’t believe that the old bolts were reused , he says that is a simple no go , and from the above comments all you good mechanics are on the same page. He’s redoing all the gaskets and fixings , hopefully it won’t loosen again. I’ll deal with the so called expert after.
Your mechanic is spot on, the exhaust bolts undergo plenty of heat cycles and strain from weight imposed by the turbo charger. Corrosion usually becomes a factor too. Well worth changing them out for oem spec bolts. Not generic hardware store examples. As for coming loose there’s no guarantee this is due to re-used bolts...
 
The full story is I have a good mechanic doing a job on the fastrack , and he’s putting in all new bolts but I only got a new turbo fitted by a so called expert and 300 hours later everything came loose , we are lucky to escape major damage . The mechanic I have can’t believe that the old bolts were reused , he says that is a simple no go , and from the above comments all you good mechanics are on the same page. He’s redoing all the gaskets and fixings , hopefully it won’t loosen again. I’ll deal with the so called expert after.

Any fixing (or anything really) attached to or involved with an exhaust will be dealing with a lot of hot/cold cycling and/or a lot of vibration and grief. It's not the kind of place where using the wrong spec stuff or old, tired fixings or the like want to be reused. They are just asking to fail on you. Having a loose exhaust manifold which suddenly lets hot exhaust gases escape into the engine bay is just asking for a serious failure of something else or an instant bonfire in the engine bay. Sounds like you were lucky.

I'm not a mechanic by any means but I do enjoy throwing stuff away and new shiny bits when working on stuff. Had an exhaust related issue a while ago with my fudging chainsaw. Old bolts attaching the exhaust to the cylinder were fudged. New ones fitted and nipped up tight beautifully.
 

ACEngineering

Member
Location
Oxon
The full story is I have a good mechanic doing a job on the fastrack , and he’s putting in all new bolts but I only got a new turbo fitted by a so called expert and 300 hours later everything came loose , we are lucky to escape major damage . The mechanic I have can’t believe that the old bolts were reused , he says that is a simple no go , and from the above comments all you good mechanics are on the same page. He’s redoing all the gaskets and fixings , hopefully it won’t loosen again. I’ll deal with the so called expert after.

On perkins 1100 series engines the bolts have Loctite on them (y) on the last of the 1000 series perkins there is a set sequence the bolts should be tightened as well! plus i think they have a special set of bolts to line the manifold up on the engine? originals are loose in the manifold to allow for expansion etc and the fitting bolts are bigger to line the manifold up while you get some normal ones in.
 
Any fixing (or anything really) attached to or involved with an exhaust will be dealing with a lot of hot/cold cycling and/or a lot of vibration and grief. It's not the kind of place where using the wrong spec stuff or old, tired fixings or the like want to be reused. They are just asking to fail on you. Having a loose exhaust manifold which suddenly lets hot exhaust gases escape into the engine bay is just asking for a serious failure of something else or an instant bonfire in the engine bay. Sounds like you were lucky.

I'm not a mechanic by any means but I do enjoy throwing stuff away and new shiny bits when working on stuff. Had an exhaust related issue a while ago with my fudging chainsaw. Old bolts attaching the exhaust to the cylinder were fudged. New ones fitted and nipped up tight beautifully.
Yes when my mechanic seen it he advised me to bring it over to him on the low loader , I had a lucky escape . What’s really annoying me is that the other mechanic claims to be an expert on these tractors. And charges expert prices.
 

ACEngineering

Member
Location
Oxon
Yes when my mechanic seen it he advised me to bring it over to him on the low loader , I had a lucky escape . What’s really annoying me is that the other mechanic claims to be an expert on these tractors. And charges expert prices.

I have never used the word expert to describe myself! Just setting your self up for a fall sooner or later! There's always new things to learn and everyone messes up once in a while!
 

br jones

Member
Yes when my mechanic seen it he advised me to bring it over to him on the low loader , I had a lucky escape . What’s really annoying me is that the other mechanic claims to be an expert on these tractors. And charges expert prices.
Can you find a workshop manuel / procedure ,
 

Chae1

Member
Location
Aberdeenshire
....very true some mechanics (most of 'em are only really 'fitters') need to work out more or buy some longer spanners :bag::bag:

We don't buy much new machinery nowadays but when we did a lot of it came out after a PDI with all sorts of stuff not torqued up properly.
Why do mechanics have longer spanners?

One of the big questions in life!

I'm just a bodger farmer with a roll of silverline spanners.
 

SFI - What % were you taking out of production?

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  • 100% I’ve had enough of farming!

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Red Tractor drops launch of green farming scheme amid anger from farmers

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As reported in Independent


quote: “Red Tractor has confirmed it is dropping plans to launch its green farming assurance standard in April“

read the TFF thread here: https://thefarmingforum.co.uk/index.php?threads/gfc-was-to-go-ahead-now-not-going-ahead.405234/
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