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Top Hat orientation on struts

96K views 93 replies 40 participants last post by  amberkiza  
#1 ·
I wasn't aware of the orientation being important with respect to the tophats when installing the front struts. I read somewhere here that to make sure the arrows are pointing in towards each other, but I also read elsewhere that due to the bolt spacing on the tophat there is only one way for it to go. I had to rework my driver side Koni shock install and made sure that the arrow was pointing in the right direction when I put it back in. I am wondering if its necessary to recheck the passenger side if in fact its true that there is only one way for it to go as long as you have it on the correct side of the vehicle.. so basically I can't have gotten it wrong.

True or False ?
 
#4 ·
I hadn't paid attention to it before, but you will notice that the body cants inwards at the mounts. The tophat supposedly is built to address this and orienting the arrow inwards puts it in the right position. Problems associated with having it wrong is noise and potentially unnecessary wear on the tophat bearings.

I am going to call the dealer today and see if they will answer the question for me. I will let you know what they say.
 
#3 ·
There is a green arrow on the top hat. The arrow is suppose to be pointing towards the engine bay which I guess you can say is towards each other. If you don't, it cause some noise in the struts form the springs turning loose..or something like that..i don't remember exactly. But I know if you don't had the arrows pointing the right way, it'll cause noise..i just don't remember how to describe it..like a clunking/clicking noise..
 
#5 · (Edited)
The arrows are suppose to point towards the FRONT of the car, not each other.

Below are pics to illustrate this. Pics are of a STOCK passenger side suspension.

Marked the stud on the top hat stud to note orientation before removal of assembly...
Image


After removal, the marked stud as a reference point confirms that the arrow is suppose to point towards the front of the car, therefore not at each other:

Image


Again this is the passenger side so as you can see using the all the reference points and the brake caliper, the arrow is suppose to point towards the front of the car, not each other.
 
#7 ·
So i just took the drivers strut out and checked. Sure enough the arrow was pointed to the outside of the car. (Fender) I'm going to take it for a drive real quick and check some of the driveways i was having issues with and i will post up the results on if it is fixed or not. Either way I'm glad you guys told me this because it was installed wrong so thank you all for your help. This is the whole reason I joined this site.
 
#9 · (Edited)
The top mounts spin freely from the boot so Im not certain on why this really matters.I have also thought they install pointing in towards the motor ...i could stand corrected.I have also installed them like this with no noise on an si but on an ex had alot of pop/clunk noise .i will be retrying this with the arrows facing in this direction When i do my reinstall on the ex.hopefully this eliminates the noise .
 
#10 ·
The reason why is the mounting point on the body of the car for the strut mount is at an angle and not flat.

When you stand the strut assembly on the ground and keep it pointing straight up, you can see a slant on the the top mount. When you correctly install the top mount with the arrow pointing the correct direction, there will be no gap between the top mount and the mounting point on the car as the top mount will sit flush with the body.

If the arrow is pointed in the wrong direction, a gap is created between the mounting point of the body and the strut mount. That gap can cause noises via the strut mount clicking with the body mounting point, the strut bearing can be damaged, which can cause the noise as well. The problem is if you reinstall the strut assembly, and noise persists, the damage to the strut bearing assembly would require replacing it. If I had noise issues due to installing the struts with the arrows pointing in the wrong direction I would just buy new bearings and new strut mounts.
 
#12 ·
The whole mount is angled, which is why the arrow must point in the correct direction. I drew a rudimentary diagram demonstrating a strut assembly before inserting it to the body mounting point to help illustrate what can happen when the arrow isn't orientated in the correct direction. The angle is exaggerated to further clarify how and why noise can develop if the top strut mount isn't sitting flush with the body mounting point:

Image


On the left the top strut mount will sit flush, because the angles match so there's no play when the assembly is bolted on. On the right, if the top mount isn't sitting flush with the body mounting point then when load is on the suspension it can allow movement via the top mount flexing and the studs can rub against the hole. The flexing can also distort the strut bearing assembly.
 
#13 ·
Ok so i did the drivers side first because thats where i was mainly getting the noise. It was a clunk/pop/rubbing/banging noise i was getting. I took it for a test drive after installing it the right way. Just to confirm or whatever the arrow is pointing to the front bumper. Anyways so after the test drive the car actually felt a little more stiff and I felt a little more control overall. Anyways so yeah i took it to the parking lots and driveways I was having issues and the noise with snd no noise AT ALL. The funny part is now im hearing a little from the passenger side. So i came home and looked at that side and sure enough the arrow was facing the inside of the car. So it was backwards. Anyways so I took that one off an installed it the right way and took a drive again. Suspension feels great. No noise at all. It's smooth and stiff like I was expecting when i bought these struts and shocks so I am finally happy with the setup now that its quiet....lol. I totally spaced and didnt take any pics when I did the drivers side but i snapped a couple of the passenger side. Here they are. Before, when the strut was out, amd after.


Here is the top hat before I took it off.




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Here is the strut when I took it out to show the bottom and how it lined up.




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Here is the top hat after the adjust and install amd where the arrow is now pointing.





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#18 ·
I can almost guarantee that this is your problem. Mine was pretty much a clunk sound and now nothing so hooefully this will fix your problem.

On another note I do have another question.

I just purchased some used struts from someone on here and I don't see the white line on them like the ones I already have. I am going to be installing these new ones I got in the next few days so I can sell my skunk2 sport strut/shock and lowering spring setup I have in right now and I wanted to include the top hats amd everything with the sale so is there another way to figure this out?

On the new onea I purchased I see the green dot on them but no white line. My old onea that are on now dont have the green dot and only habe the white line so i cant compare the 2 to make sure they are lined up the same with that dot.
 
#24 ·
Chris g Yes i came across this problem and am having same sound issues as you.Im going to do the reinstall this week hopefully .i would inspect your top hats and bearings as you can lift up on the bearing assembly ( do not fully remove top hats or bearings go everywhere ) to see if there pited or damage or to regrease.
 
#25 ·
Mind going into more detail with the noise you are getting? You can visitor message or PM me if need be. I am curious if we are experiencing the same thing. I am going to be ******* pissed if it's anything to do with the suspension being assembled incorrectly... as I paid to have that done.

I guess I should add that my suspension is not clunking at all... not once.
 
#28 ·
after fixing my top hat orientation I wasn't able to hear any more noise up front. The passenger one was right but the driver was completely backwards. I also took a moment to add some additional grease to the top hat bearings. Now I just need an alignment and for my broken hand to heal up enough so that I can start racing again.

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#31 ·
So my tophats are oriented correctly (marked bolts inward) but my driver side front seems to be close to an inch lower than the rest of the car. I'm rolling stock LX-S springs with Koni yellows. The springs have 75k miles on them. 90% of that is rolling on twisties (east TN mountain roads). I installed the yellows last weekend, so I've given them a week to settle in. Any ideas why my FL is riding lower than the rest of the car? I'm wondering if my springs are shot.


~Sent through this great digital frontier using my Dinc.
 
#32 ·
well I don't think prolonged use of top hats in the wrong position would cause that. From what I read that generally causes advance wear and tear on the top hat bearings.

Silly question, but have you checked that you don't have the springs inserted backwards with the rubber cushion towards the back. it should sit towards the outside.

How long have you had the springs?

P.s. as good measure, did you put down some grease on the top hat bearings since you had the struts out anyways? It's unrelated to your question.

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