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Tie Rod Installation

 
Old 03-17-2019, 04:15 PM
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awilli6
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Default Tie Rod Installation

Hey guys,

i installed new tie rods and ends on my 89S4 Friday. Took it to Sears to get an alignment. Technician said he couldnít align it. He has it screwed as far as he can get it. Thinks it may be the wrong parts. I got the parts from Roger. Is there anything I could have done wrong? Put the on the same way I took the others off.

The only thing I saw different from old parts is the part that screwed into the rack had four indentions (where wrench slides on) where as the new ones had 2.

Last edited by dr bob; 03-19-2019 at 02:06 PM. Reason: title spelling
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Old 03-17-2019, 04:21 PM
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Adamant1971
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1. If you got parts from Roger Iím sure they are correct.

2. Donít take the car to Sears, find a 928 mechanic or at least a Porsche shop.

3. Post pics of your tie rods please.
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Old 03-17-2019, 04:27 PM
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Sears still has open stores?

Are they using a rack centering bolt in the rack?
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Old 03-17-2019, 04:32 PM
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Originally Posted by SeanR View Post
Are they using a rack centering bolt in the rack?
+1. Sean hit he nail on the head me thinks.
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Old 03-17-2019, 04:34 PM
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Originally Posted by Adamant1971 View Post
1. If you got parts from Roger Iím sure they are correct.

2. Donít take the car to Sears, find a 928 mechanic or at least a Porsche shop.

3. Post pics of your tie rods please.




Here are the tire rods installed
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Old 03-17-2019, 04:45 PM
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Originally Posted by SeanR View Post
Sears still has open stores?

Are they using a rack centering bolt in the rack?

Dont know about a rack centering bolt. Iíll check.
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Old 03-17-2019, 05:56 PM
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It looks like you got the wrong tie rods,
the ones on your car appear to be for the older series 78 to 86,
Look on E bay and you will see used tierods for a 1988 S4 available,
and then compare them to a 1978 928 and the newer year inner rods are clearly shorter


Did you match them up before you installed them?

Last edited by Mrmerlin; 03-19-2019 at 09:03 PM.
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Old 03-17-2019, 06:16 PM
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Thanks Stan. The boots are on, just pulled back so I could tighten them to the rack
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Old 03-18-2019, 10:18 AM
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Compressed

Extended
Ashley - Number one - I am sorry you are having issues.
928 347 031 10 is early 78 to 86 & 928 347 031 09 is late 86.5 to 95. (ROW 78 to 85 & 86 to 95)
Looking at the pictures you do have the correct tie rods. However now I have the early 78 to 86 & later 86.5 to 95 side by side there is very little difference between the two.
The hub end is the same part on both early and late. When shortened as much as possible the early tie rod is 10mm shorter than the later rod.
When extended to max length there still is only a 10mm difference between the two.

So apart from the 10mm what makes them different?? For instance the same steering rack is used on an 86 as on an 86.5. So it must be in the geometry of the hub.

Of course I could have missed something completely.
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Old 03-18-2019, 01:14 PM
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Ashley - if you look at both wheels head-on at the front of the car are they pointing towards the center of the car (toe-in) or outwards (toe-out)??
With both tie rods on max compression they should be pointing inwards (toe-in) substantially.
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Old 03-18-2019, 05:25 PM
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I think "max compression" (shortest overall tie rod length) will give you toe out.
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Old 03-18-2019, 06:06 PM
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Originally Posted by Geza View Post
I think "max compression" (shortest overall tie rod length) will give you toe out.

Good point, I was thinking backwards when talking with Roger this morning. Told him that it would be like looking at your nose. You are correct.
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Old 03-18-2019, 06:07 PM
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Originally Posted by Geza View Post
I think "max compression" (shortest overall tie rod length) will give you toe out.
Sorry you are right of course - either way I need to know Ashley please?
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Old 03-18-2019, 07:23 PM
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I canít tell. I have the front sitting on ramps. What do yíall think
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Old 03-19-2019, 03:25 PM
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Impossible to say from the pics.

Do you know how to do 'jackstands & strings' to check your alignment?

Short version:
Tie a long string to a jackstand, put it behind the tire. It has to be low (or high) enough that it only hits the sidewalls of the tire, not the rim. I can't tell what wheels you have, but normal man-holes bulge out in the center and can mess this up.
Run the string out in front of the car to another jackstand. Repeat on other side.

Measure distance between strings at front of car, and again as far out as the strings go. I usually go 10 feet (strings are about 15'). Basic geometry (trapezoids) will give you toe. You can get see quite easily if it's not at least close.

It's pretty 'fiddly' and the setup has to be near perfect. I have the string wrapped around the back side of the tire and just barely touching at the front. Double check the string a few times. I use an old folding carpenter's rule. It's rigid and can be put across the span without flexing.I (again) just barely touch the end to one string and see where the other string is without touching. Take each measurement multiple times.

With a bit of effort and a willingness to check and recheck a few times, I can get my toe set pretty good.
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