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Front suspension knock????? - Printable Version

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Front suspension knock????? - Sri~mike - 11:th-Mar-2019

Hey guys, I’ve recently noticed that driving over uneven/ rough roads that I’m getting a knocking noise, if I hit a pothole or large bump there’s nothing but any sort of slight bumps or similar and I’m getting lots of knocks like the anti roll bar bushes are shot, last weekend I got it on my mates 2 poster ramp and got the pry bar out checking everything and it’s all completely solid, but for how cheap they were I fitted a pair of new drop links thinking it could only be them but no joy, all my shockers are clean and bone dry and springs are perfect and I lowered the car so the tyres were about an inch off the ground and put a long pry bar under each wheel to check the top mounts and no play whatsoever, please help???? Oh also it’s a 1.4 Sri on a 65 plate with 40k miles thanks


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RE: Front suspension knock????? - Big Dave2 - 12:th-Mar-2019

Does it do it when the brakes are applied?

The knocking coming from mine turned out to be the brake pads rattling in the callipers. Drove me mad trying to find where the noise was coming from. A slight bend of the anti rattle shims was all it took to cure the noise.

Front suspension knock????? - Sri~mike - 13:th-Mar-2019

No mate it does it during normal driving, I’ve read somewhere before about there being a problem with the brake pad shims but I’ve had a good wiggle of each and there’s nothing ????


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RE: Front suspension knock????? - Rusty2009 - 16:th-Mar-2019

Could be the top mount they can fail or start to come apart had it on mine and there was no play it was only when changing the shock we found it.

Front suspension knock????? - Sri~mike - 16:th-Mar-2019

(16:th-Mar-2019, 09:36:03)Rusty2009 Wrote: Could be the top mount they can fail or start to come apart had it on mine and there was no play it was only when changing the shock we found it.


I’ll check that out cheers rusty, I’ve de catted my car today, searched high and low for a 4 branch manifold for it with no joy so took the gamble and ordered one off a Vauxhall corsa c 1.4 twin port and it fits perfectly and even mates up to the same flange at the bottom right next to the flexi joint, noticeable increase in power but has now given a slight rasp on initial revs, I’ll soon sort that with an extra resonator box sleeved into the system but has transformed the drivability as I was for getting rid of it for being so damn underpowered


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RE: Front suspension knock????? - welshp - 8:th-Dec-2020

(16:th-Mar-2019, 21:16:43)Sri~mike Wrote:
(16:th-Mar-2019, 09:36:03)Rusty2009 Wrote: Could be the top mount they can fail or start to come apart had it on mine and there was no play it was only when changing the shock we found it.


I’ll check that out cheers rusty, I’ve de catted my car today, searched high and low for a 4 branch manifold for it with no joy so took the gamble and ordered one off a Vauxhall corsa c 1.4 twin port and it fits perfectly and even mates up to the same flange at the bottom right next to the flexi joint, noticeable increase in power but has now given a slight rasp on initial revs, I’ll soon sort that with an extra resonator box sleeved into the system but has transformed the drivability as I was for getting rid of it for being so damn underpowered


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[quote pid='50875' dateline='1552767403']
Hi Sri~mike, did u make any progress with this?

I've had my anti roll bar bushes replaced, drop links replaced and brake shims sorted but still have a seriously annoying crash over smaller bumps / even roads.

I've just had a quote of £330 for front shocks & top mounts but having spent £400 already I'm seriously reluctant to double my spending just by guessing at resolutions.

Cheers,
[/quote]

RE: Front suspension knock????? - Jpbroad1970 - 8:th-Dec-2020

I've found the sri quite noisy on suspension anyway, I've had 2 and both the same. The elite I had was far softer and quieter.

RE: Front suspension knock????? - welshp - 8:th-Dec-2020

(8:th-Dec-2020, 21:13:58)Jpbroad1970 Wrote: I've found the sri quite noisy on suspension anyway,  I've had 2 and both the same. The elite I had was far softer and quieter.

I've got the SE CDTi so assume it 'should' be quieter. Mate has an SRI and TBF even that sounded a lot better. Obviously 'something' loose / worn but struggling to nail it down, 3 garages have looked now - So annoying (and getting expensive)

RE: Front suspension knock????? - Jetcolour - 8:th-Dec-2020

It could be caliper rattle. The slider pins on the brake calipers aren't the tightest of fits on the astras. When you hear it rattling, if you gently apply the brakes, does it stop?

RE: Front suspension knock????? - welshp - 9:th-Dec-2020

I did put brand new (new off eBay) ones on a couple of months ago. I found even the new ones on the bottom of the calliper were loose once fitted. The bottom ones do not have the rubber shim but rather a slither cut off the side of the pin. I packed it with grease and put a shim from a coke can around it and was sure it made a difference after driving but could have been placebo.

I will have a play again this weekend, could be that the shim has come out - I Will try and put the old top pins in the bottom as they didn't appear to have anything wrong with the rubber band.

RE: Front suspension knock????? - M222RJF - 22:nd-Dec-2020

I have new springs fitted to my GTC, after a few weeks a knocking noise started.

Bought new drop links and outer tie rod ends.

Didnt fix the problem. Springs were new.

It ended up being the bolt that is at the very bottom of the knuckle was loose.

Tightened it up about 2-3 turns and the noise stopped.