Exhaust Changed. Are The Nuts Missing From The Resonator Bolts

[omeo]

I had my exhaust rear and central silencer replaced. I have attached an image. Are the resonator spring bolts missing nuts at the end or is this normal set up??? I can see a flat head at the top of the threaded bolt on the other side of the plate which seems to secure the bolt thread in to the plate. It seems really solid and there's no movement at all.

Thanks

[The Transporter]

Mine has nuts on to lock the bolt but I can't see it being a big issue.... Chances are that the nuts were so corroded that they chucked them.... If it bothers you then pop back to the exhaust fitter who did the job...

[is200 Newbie]

Yes - nuts are missing - it not fitted then the seal will break as the exhaust flexes and it will be an MOT failure

[omeo]

Cool . I can get some nuts myself and attach them on

[Shekie]

looking at the pic there should be nut on them unless the holes are threaded then you should be ok.

[omeo]

The holes are threaded. I saw the guy use a torque wrench on the the two bolt heads on top of the spring until he could not tighten anymore

[omeo]

I finally spoke to the guys who installed my exhaust my they said Yeah as the flange which is the plate is threaded no need for bolt

[The Transporter]

The nuts are there to lock the bolts to ensure that the bolts don't come loose. I've never seen an exhaust fitter use a torque wrench....Most of them wouldn't know what one was..

[omeo]

He was a mechanic .

I spoke to 2 lexus parts departments . The exhaust i have is very similiar to the oem design . They advised that the oem bolts which I'm using to connect the rear and centre are captive nut. They are designed to thread into the phlanj plate. They advised even an oem nut does not exist.

[The Transporter]

Yeah, Just had a look at my new pattern exhaust that is waiting for me to fit, the flange is threaded with no captive nuts welded on.. It is satisfactory but I shall fit a couple of new nuts and washers to spread the load when I get round to fitting it. The old exhaust has nuts.....Or blobs of rust

[omeo]

Weird design compared to other manufacturers but seems sturdy. I see how it goes just might later add some nuts and washers if I feel there is an issue. Remember to use a thread lock . Thanks for all your help guys.