Outer track rod end confusion
Outer track rod end confusion
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Discussion

Oldandslow

2,405 posts

237 months

Saturday 31st August 2019
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The youtuber was right if you are replacing like for like but just to get close enough to then drive it to the alignment shop.

In your case you need to figure out how much longer they are. Measure centre of ball joint to end of bar on new versus old. Then figure out the thread pitch. It'll be something like 1.5 maybe. Count 10 threads and measure, divide by 10. Figure out how many pitches in the extra distance (say, for example, pitch is 1.5 and extra length is 18mm then 18 divided by 1.5 is 12, so 12 extra turns). Then alignment shop.

E-bmw

13,593 posts

183 months

Saturday 31st August 2019
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What he meant was:

Measure 1cm along the threaded end, see how many turns you need to screw the end on to get there & reduce your 13 by this amount.

So, if it takes 5 turns to go 1cm you will end up putting them on by 8 turns instead of 13.

GreenV8S

31,027 posts

315 months

Saturday 31st August 2019
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The goal is to get the joint itself in the same position relative to the rod. If the threaded part of the joint is 2cm longer then it will need to be threaded on 2cm more to get the joint in the same position.

Are you sure they are the right part? 2cm is a huge discrepancy.

GreenV8S

31,027 posts

315 months

Saturday 31st August 2019
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CWFN2 said:
Hypothetically speaking, say if i leave it at 13 spins which is the same as the old shorter rod and take it to alignement, what would happen after its aligned? Would it drive dead straight or would something be wrong?
If you drive the car with the track rod lengths wrong by a couple of cm the tyres will suffer a lot of wear. Maybe OK for a mile or two but far from ideal.

If the threads have enough adjustment in them to take up the extra length then after the alignment is corrected there will be no impact at all, it will be as good as new. But that is a big difference to take up.

GreenV8S

31,027 posts

315 months

Saturday 31st August 2019
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CWFN2 said:
right, well rain kicked in so couldn't change it out. But to summarise, I will remove the outer track rod, work out what the difference equates to in spins and then do 13 spins + the number of spins to cover 1.5cm and then lock the jam nut in place. This way relative to the old rod, the setup will be similiar?
Sounds correct to me. Bear in mind that I haven't see the two parts you're talking about so I'm just going by your description.

Matt_E_Mulsion

1,746 posts

96 months

Saturday 31st August 2019
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If you do one side, keep winding it on until your steering wheel sits straight when you drive it up the road. Then it won't be far off where the original ball joint was located.

Repeat on the other side and you'll be somewhere close to where you want to be. Then take it to a garage and get it tracked up 100%.

Oldandslow

2,405 posts

237 months

Saturday 31st August 2019
quotequote all
CWFN2 said:
GreenV8S said:
Sounds correct to me. Bear in mind that I haven't see the two parts you're talking about so I'm just going by your description.
I did 12 turns (i cant remember if the original was 12 or 13 turns). 10mm of threads were 7 so 1 thread is 1.428576... so rounded to 1.5mm a thread as stated above. Then i worked out the total rod lengths with a ruler. It seems they are exactly 1cm apart. So 10/1.5 = 6.6 turns. So rounding down I did 12 + 6 = 18 turns.

It looks like this, there doesnt seem much threads behind the jam locking nut. https://imgur.com/a/Y4YxMFb

What do you say? Should I just stick to this number of 18 turns and do the passenger front and then just leave it for alignment?

https://imgur.com/a/gfriMiW These are the rods. fk sake why couldn't they just be the same size!! rolleyes
Sounds like you're pretty close. There's not much room left there for adjustment but it may not be needed. If worst comes to worst you could cut the extra 1cm off the end of each of them.

GreenV8S

31,027 posts

315 months

Saturday 31st August 2019
quotequote all
CWFN2 said:
Does it matter in the end?
If the alignment is out you'll get wierd handling and accelerated tyre wear. If they're close enough for the wheels to look about right to the naked eye then you'll be ok for short distances and low speeds.

GreenV8S

31,027 posts

315 months

Saturday 31st August 2019
quotequote all
CWFN2 said:
in the end would it matter?
As long as there is enough adjustment left in the thread to get the alignment right then it doesn't matter.

Jakg

4,058 posts

199 months

Saturday 31st August 2019
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CWFN2 said:
It's defo the right part. The numbers matched and the listing shows its for the FN2 type R.
Never trust an eBay listing when it comes to any kind of unusual car, always use the manufacturers website if possible.

I have a PH2 MK2 RenaultSport Megane. Some rear discs listed as being compatible with my car are for the PH1 and won't fit, and some are for the non-RenaultSport models so definitely won't fit. Even stupid stuff like front pads (4 piston brembo caliper vs single piston sliding caliper). I buy about half my car parts from eBay without issue - you just need to double check it's the right part.

In this case the part number listed is right for an FN2 Civic Type R - but it's listed as being 195mm long.

https://web2.carparts-cat.com/default.aspx?32=2658...

EDIT - Although those aren't Meyle HD as you said. The Meyle HD part is 31-16 020 0054/HD - https://web2.carparts-cat.com/default.aspx?32=2658...

Edited by Jakg on Saturday 31st August 19:36

E-bmw

13,593 posts

183 months

Saturday 31st August 2019
quotequote all
CWFN2 said:
Say one car did 15 spins and goes to get alignment, and one does say 20 spins and goes for alignment in the end would it matter? As in will the alignment make how many turns the outer rods made on the spindle irrelevant?
Well of course it won't make any difference, as they will then be adjusting them to make them right!

That is given the caveat mentioned a few times already that you have not got far to go & will only be going slowly as you handling may possibly be a bit strange if they are too far out, you may possibly get a lot of tyre squeal depending on the road surface, and you may possibly get a (relatively) high degree of tyre wear.

Although I have to admit that after telling you to just add the number of turns it took for 1cm I have no idea why you then rounded it to the next number twice before doing it to a different place, so even then it was going to be wrong.

Jakg

4,058 posts

199 months

Saturday 31st August 2019
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EDIT - My mistake - the part number on the eBay listing isn't the one you've got...? You've got the HD ones

E-bmw

13,593 posts

183 months

Sunday 1st September 2019
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No they are exactly the same for the very reason that you replace them the same number of turns & so end up with the same alignment & level of adjustment remaining.

227bhp

10,203 posts

159 months

Sunday 1st September 2019
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If you've got a length of string and a bit of common set the tracking up yourself. The accuracy of that is dependent on how long you want to take over it and your level of intelligence.

normalbloke

8,968 posts

250 months

Sunday 1st September 2019
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Just out of interest, did the originals fail on play or the rubber cover?
My head hurts reading this. I wonder how much the MOT station would have charged to change them both....

GreenV8S

31,027 posts

315 months

Sunday 1st September 2019
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CWFN2 said:
E-bmw said:
No they are exactly the same for the very reason that you replace them the same number of turns & so end up with the same alignment & level of adjustment remaining.
What are exactly the same? You mean the old and new rods apart from the 1cm extra?
We're being trolled.

E-bmw

13,593 posts

183 months

Sunday 1st September 2019
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Either that or we have unearthed the missing link! wink

E-bmw

13,593 posts

183 months

Sunday 1st September 2019
quotequote all
CWFN2 said:
spinning the inner rod makes the number of turns on the outer rod irrelevant.
Pardon?

You MUST be able to understand that the whole idea is to get the actual joint at the end in the correct place to point the steering in the same place as it was before you started?

So if they are longer you need to screw them in by the same amount more.

That is a really simple concept, otherwise the wheels will both point in by too much.

(they still should be the same as the originals though, so you likely have the wrong ones as others have said before me)


Edited by E-bmw on Sunday 1st September 19:44