Problem with H&R lowering springs

Problem with H&R lowering springs

Author
Discussion

chippy minton

Original Poster:

5 posts

116 months

Monday 18th November
quotequote all
Hi folks. I’m having some issues with the fitment of some aftermarket (H&R) lowering springs for my 04 3.8 C2S.
An MOT spotted that one of the front springs had cracked at the base. Not an uncommon problem so I’m told.

I decided to go lower so ordered a set of H&R -30mm springs and all of the associated sundries inc top mounts, bearings etc.

These were fitted by a garage.

I’m not saying who supplied them or who fitted them as at present they are hopefully working towards a resolution.

I would say though that I’m surprised that they let me drive off with them in the state they are in.

The problem is that the top diameter of the new lowering spring is too big, and it sits outside the location it is meant to sit within so it doesn’t seat correctly and it moves around, and especially at low speed, making a racket and pulling the steering to one side until it clinks back into something like a normal position.

The garage confirmed that all the elements of the assembly are correctly installed.

The parts supplier claim it’s the right part and the garage are stumped. Sadly the stock springs have been thrown away so I can’t make a comparison.

Any ideas?

Could they have been marked incorrectly? Do C4’s have a different top mount? Could they just be made incorrectly and they got through QC?

chippy minton

Original Poster:

5 posts

116 months

Monday 18th November
quotequote all

cossers

1,778 posts

88 months

Monday 18th November
quotequote all
What idiot fitted that? Just looking at that I’d guess the incorrect springs has be been sent, that is not sitting tight on the spring central locator, the spring top should sit fully within that triangle, that’s just bloody dangerous not to mention, possibly damaging the top mounts.

Watch this vid from about 7 mins in, you’ll see how it sits inside the top cup.

https://m.youtube.com/watch?v=icbfGIcVENs

Edited by cossers on Monday 18th November 23:37

chippy minton

Original Poster:

5 posts

116 months

Tuesday 19th November
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Thanks for that - a useful point of reference. clearly shows how far off my spring is.

cossers

1,778 posts

88 months

Tuesday 19th November
quotequote all
no probs and I honestly would not be driving your car until that’s sorted! If you do it could prove very costly indeed

R8_BAV

63 posts

49 months

Tuesday 19th November
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That is completely the garages fault as even if the incorrect springs were sent they should have had the sense and decency to stop the install as soon as they saw they didn’t fit, instead they just sent you on your way!? Looks like they have either put something in upside down or backs on the front etc?

Hax

26 posts

84 months

Tuesday 19th November
quotequote all
Not just that, why has the paint rubbed on the second coil?
Coils shouldn't be in contact with each other even on full compression.

chippy minton said:

mlsporsche

38 posts

27 months

Tuesday 19th November
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C2 and C4 different springs as are PASM & standard, what numbers are on the springs?

FTW

267 posts

124 months

Tuesday 19th November
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The pictures make it appear that the spring is going coil bound (fully compressed) and has rubbed away the protective coating. It won't take long to corrode and snap in that portion. I think the Porsche spring has a plastic sleeve to stop the wear in that portion.


Personally I'd be questioning if the parts are correct for the car. If they are then the part is poorly designed.


Filibuster

1,232 posts

163 months

Tuesday 19th November
quotequote all

Slightly OT, and not meant as an excuse for poor fitting on the garages part but:

This is exactly the reason, why most garages won't fit customer supplied parts....

Not meant as a rant to the OP! I for instance will be bringing my 997 tomorrow to the garage to get the Brembo discs and Textar pads fitted I bought 2 months ago. I intended to do the works myself and even bought a brake piston compressor tool. I just never found the time to do it (no own garage), so I bring it to the only one man garage I know that still fits customer supplied parts.

But I can see why basically all garages I know won't do it anymore...

cmoose

45,312 posts

177 months

Tuesday 19th November
quotequote all
FTW said:
The pictures make it appear that the spring is going coil bound (fully compressed) and has rubbed away the protective coating. It won't take long to corrode and snap in that portion. I think the Porsche spring has a plastic sleeve to stop the wear in that portion.


Personally I'd be questioning if the parts are correct for the car. If they are then the part is poorly designed.
The correct H&R spring does have a plastic sleeve. Here's H&R fitted to the front axle of a 987 (which is the same as the front axle of a 997), you can see the sleeve:



That image is with the car on the ground and the spring compressed.

Oh, and this...

Hax said:
Not just that, why has the paint rubbed on the second coil?
Coils shouldn't be in contact with each other even on full compression.
...is not correct. Some of these springs are designed to be partly coil bound on compression - ie to have some of the coils touching each other but obviously not all.

chippy minton

Original Poster:

5 posts

116 months

Wednesday 20th November
quotequote all
Filibuster said:
Slightly OT, and not meant as an excuse for poor fitting on the garages part but:

This is exactly the reason, why most garages won't fit customer supplied parts....

Not meant as a rant to the OP! I for instance will be bringing my 997 tomorrow to the garage to get the Brembo discs and Textar pads fitted I bought 2 months ago. I intended to do the works myself and even bought a brake piston compressor tool. I just never found the time to do it (no own garage), so I bring it to the only one man garage I know that still fits customer supplied parts.

But I can see why basically all garages I know won't do it anymore...
It’s a fair point and I wouldn’t normally supply parts to a garage, but I cross checked the price of the parts they quoted against a well known specialist and they were cheap enough to make it worthwhile. (Especially as they had a 10% flash sale on) The cost for top mounts and bearings was quite different.

The parts supplier is ordering a set of C2 and C4 springs and checking fitment against the top mount, and then sending the correct springs to the garage to fit them. Hopefully there’s no damage to the rest of the assembly.




chippy minton

Original Poster:

5 posts

116 months

Wednesday 20th November
quotequote all
cmoose said:
FTW said:
The pictures make it appear that the spring is going coil bound (fully compressed) and has rubbed away the protective coating. It won't take long to corrode and snap in that portion. I think the Porsche spring has a plastic sleeve to stop the wear in that portion.


Personally I'd be questioning if the parts are correct for the car. If they are then the part is poorly designed.
The correct H&R spring does have a plastic sleeve. Here's H&R fitted to the front axle of a 987 (which is the same as the front axle of a 997), you can see the sleeve:



That’s interesting- when I collected the car the garage did call out that the spring didn’t have a plastic sleeve like the factory parts do, and it might be noisy. That’s what I put the ‘clonks’ down to.

Thanks for sharing the picture - this is very helpful 👍