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Vauxhall Tigra - Question about nuts, bolts and torque - Derseffect66

Vauxhall Tigra 1.4L 2009, Plate :LT09UBC VIN: W0L0XCR978E007716

Hey everyone, I recently got told I need both lower control arms replacing as it is making my vehicle creak a lot. Currently, I am trying to learn to fix these things myself and am confident enough I can do the job. However.

My issue is I have no idea how to know which bolts I need when replacing them. I get the material is an important factor, how do I go about easily finding out which bolts I need for which parts on my car? Often parts don't come with the fastening material.

Aside from googling, is there a good way to find torque specs of certain bolts on my car? I see tutorials for a Corsa C which is similar, parts are the same, but does this mean torque of bolts is the same?

If anyone knows by any chance which bolts I need for a 09 tigra lower control arm replacement that would be great also :P

Vauxhall Tigra - Question about nuts, bolts and torque - elekie&a/c doctor
I’m all for diy repairs , but replacing the lower arms is a straightforward job for a garage with a ramp who will have the correct tools. You only need replacement bolts if the originals are damaged . Final torquing needs doing with the car on its wheels. The geometry will also need to be checked after the repair.
Vauxhall Tigra - Question about nuts, bolts and torque - Derseffect66

Thanks for your reply, unfortunately looking at the internet you get different answers everywhere. I had been seeing it's best to replace these things but I didn't really see the need if they look in good shape. I'm planning an allignment at a garage after the works done.

Vauxhall Tigra - Question about nuts, bolts and torque - edlithgow

Quick look finds

downloadworkshopmanuals.com/index.php/8-workshop-m...b

For a tenner, which isn't too bad assuming it isn't a rip off.

More extensive poking around might find it for free, though of course its the Internyet, so you might get a free virus too.

You'll need axle stands, and a basic tool set. Better check the manual and/or youtubery and owners groups for any gotchas like special tools needed, though I wouldnt particularly expect any.

As above, you shouldn't need to replace bolts, unless any are TTY, "stretch bolts" which I wouldn't expect in this context.

If you do. replace like with like. The grade of steel is likely important for suspension components

Edited by edlithgow on 03/01/2025 at 23:23

Vauxhall Tigra - Question about nuts, bolts and torque - Derseffect66

That's very useful I did have a brief look for something like that but couldn't find much. I did manage to get Autodata for a month and downloaded what I could, but may also purchase that too. I've went out and got myself a good few tools I'd need for repairs, and lucky the ball joint comes installed so no special tools.

Vauxhall Tigra - Question about nuts, bolts and torque - elekie&a/c doctor
Yes , you’re right . The arms come with new ball joints , but you need to get the old ones out of the hub . They generally don’t fall out and need some persuasion. Do you have a ball joint splitter ?
Vauxhall Tigra - Question about nuts, bolts and torque - blindspot

it's a DIY job . if you have no experience of doing this plenty could go wrong. youtube is your best teacher. buy a ball joint separator do not buy online manuals change drop links at the same time and maybe tie rods .

Vauxhall Tigra - Question about nuts, bolts and torque - edlithgow

Re ""Aside from googling, is there a good way to find torque specs of certain bolts on my car? I see tutorials for a Corsa C which is similar, parts are the same, but does this mean torque of bolts is the same?""

I'd say the chances are that the torques are the same, except where they are different.

I base this on analogy with my last car, A Daihatsu Skywing, built in Taiwan based on the Daihatsu Charade

I had workshop manuals (downloaded from an Australian Charade site before they banned me for arguing) for the CB20 and the CB23 Daihatsu engines, which had torque values mostly the same except where they were dramatically different, as for the crankshaft bolt, where one was twice the other.

Unfortunately, the Skywing as a Taiwan-only car, was undocumented, documentation not being Taiwanese style.

It allegedly (I say allegedly because thats what the handbook that came with the car said, but it was for a Daihatsu Saphir, which I’d never heard of but had to assume was the same thing) had a CB22 engine, which I couldn’t find specs for anywhere, so I assumed CB23 specs applied,

.A guess, really, but (a) the best I could do, and (b) I think torque is very overrated, so I was disinclined to worry about it.

Neither of these conditions probably apply to you,

If you cant find a workshop manual (Youtube is probably NOT "your best teacher" for torque values, if for anything) you could perhaps check critical values with a garage or dealership.

This wouldnt be likely to be productive in Taiwan

Edited by edlithgow on 09/01/2025 at 03:20

Vauxhall Tigra - Question about nuts, bolts and torque - edlithgow

Alternatively, if you really can't find the torque values, you can assume that the fastners are currently correctly torqued, and use the "turn of the nut method",marking them and recording the number of turns it takes to take them off, and putting them on using the same number of turns.

This has the collateral advantage that you can apply lubricant, antiseize etc without affecting how tight they are, whereas torque values are often specified dry.

Unfortunately you cant effectively directly measure fastner torque settings, since "break out" torque values are an uncertain guide to how tightly they have to be done up, though generally higher.

Vauxhall Tigra - Question about nuts, bolts and torque - medview

I suspect that you are talking about the anti sway bar drop links which generally cause creaking after about 2 years of use on our r****** roads. They are very easy to change.

Joe

Vauxhall Tigra - Question about nuts, bolts and torque - edlithgow

I suspect that you are talking about the anti sway bar drop links which generally cause creaking after about 2 years of use on our r****** roads. They are very easy to change.

Joe

They can be VERY solidly rusted in on a Nissan Sunny in Edinburgh.

BFH, full weight of the vehicle and much persistance required.