Question for mechanics

[agri knives]

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.

 

[Farmer_Joe]

id be more tempted fo fit a new oil feed and banjo bolts if it were me and or gaskets associated with oil feed.

 

[Pebd99]

Depends on the age of the old bolts really. Not fine putting old bolts in with possible a picked up thread or snapping halfway torqued up. Boring out sheared studs isn’t fun.

 

[avag]

Yes ive always replaced, it aint worth the hassle of reusing them most genuine bolts are cheap enough

 

[startinghandle]

New bolts every time

 

[agri knives]

Depends on the age of the old bolts really. Not fine putting old bolts in with possible a picked up thread or snapping halfway torqued up. Boring out sheared studs isn’t fun.

In this case origionial would be 12 year old

 

[deleted user 837354]

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.

 

[agri knives]

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]

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...

 

[deleted user 837354]

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]

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 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.

 

[yellowbelly]

As for coming loose there’s no guarantee this is due to re-used bolts...

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

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.

 

[deleted user 837354]

For something like that it should be torqued up properly and in the correct sequence. There is a myriad of tools out there to help twist nuts and bolts up correctly without growing a new hernia in the process.

 

[agri knives]

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]

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]

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 ,

 

[agri knives]

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!

The more I’ve learned since about this guy the worse it gets , he has cost some lads a fortune . I only heard all these stories since .

 

[agri knives]

Can you find a workshop manuel / procedure ,

The guy doing it now , could do it right with a blind fold on And one hand tied behind his back.

 

[ridger]

Always heard that an expert was an ordinary person, away from home, and the further he goes the more he knows

 

[Chae1]

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

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.