Hello,

I keep finding (since ownership) that the exhaust manifold nuts on cylinder 1&3 keep working loose a and coming right off. Initially I thought the tapping noise was valve clearances needed doing but after finding the nuts near the rear spring well that fave it away
I've done them up 3 times in 3k kms - but really I shouldn't need to

I'm scared to over tighten them it tbh I do them up fairly tight. I can't get my torque wrench in there unfortunately.
Should these nuts be replaced each time?
Is this a trait of nc30's to work loose?
Any tips to stop it happening?

would it be possible to remove them and fit 2 standard nuts so that you can lock em together once tightened if you know what i mean

Mm.mm not thought of that but tbh it's hard enough getting one on there!!
On a car they are normally brass but these aren't.

what about some of these bud?

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simes205 wrote:Hello,

I keep finding (since ownership) that the exhaust manifold nuts on cylinder 1&3 keep working loose a and coming right off. Initially I thought the tapping noise was valve clearances needed doing but after finding the nuts near the rear spring well that fave it away
I've done them up 3 times in 3k kms - but really I shouldn't need to

I'm scared to over tighten them it tbh I do them up fairly tight. I can't get my torque wrench in there unfortunately.
Should these nuts be replaced each time?
Is this a trait of nc30's to work loose?
Any tips to stop it happening?

Tighten them up properly, certainly not a trait.

Never had any come undone before that were put on tight enough. It's Only reason I can think of is they are not tightened enough.

rear cylinders? do you mean the stubby or the pipes to stubby? genuine or aftermarket system?

or use some plain and spring washers.
In stainless of coarse.......

Nice one,

Thanks

Simon