Rear oil leak

[garak112]

Just looked under the new car and noticed oil on the exhaust, which seems to be coming from the diff mounting point.

 

What is this oil and where is it coming from?

 

[Ewen@Clark Motorsport]

The bush is oil filled and over time they bleed.

 

We sell poly bush replacements from Whiteline.

 

Drop me a PM if I can help

[garak112]

Thanks for the quick reply.

 

What's involved in changing it over and can it be left for a bit?

[Ewen@Clark Motorsport]

It will be fine for a while this is just the start of it deteriorating. They are not simple to change but if you are relatively competent you will manage it.

[garak112]

After looking at the workshop manual it doesn't look too difficult to get the diff out. Do the subframe and exhaust need to come out as well?

 

How hard is it to get the old bushes out, do they need a press? Any difficulties getting the new ones in?

[garak112]

I have bought the bushes and had them delivered today but am a bit confused by them - the steel tube inserts are tight when in the thinner half of the bush but loose when in the thicker half (the hole is bigger). Is it supposed to be like this as it looks like it would cause the whole thing to move around?

[ZMANALEX]

I have fitted and sold many of the diff bushing kits and had no issues.

 

I am assuming that you are referring to the front bushings and not the bushing that has failed.

 

You have not said what brand of bushing kit you purchased or who supplied it, so if you provide that info then I can advise further.

 

However may also be a plan to direct this question directly to your supplier.

 

Alex.

 

[garak112]

Its a whiteline bushing kit

 

http://s28.postimg.org/nl71y7sbx/WP_20140903_19_42_46_Pro.jpg

[ZMANALEX]

Prior to Whiteline changing the colour of the bushings to black from yellow I have not known of such issues as the sleeve was always a tight fit in both the bushings.

 

Go back to your supplier and talk with them and give them the opportunity to sort it for you, as something does not appear to be right.

 

Alex.

[garak112]

Thanks Alex, I have dropped the supplier an email.

Hopefully I can get this sorted quickly as the car is booked in with Sly next week to have it changed.

[garak112]

I have had my replacements delivered today (prechecked before sent out) and they fit the tubes properly. I took a couple of shots where you can see the difference:

 

 

Correct one on the left

 

 

The correct one can be seen through the hole in the incorrect one. Both bushes are stamped 67415 but the ones with the big hole are also stamped Z1. Looks like they may have been drinking the day they put these in the bag at the factory!

 

I am just grateful that the replacements arrived so quickly.

Edited September 5, 2014 by garak112

[ZMANALEX]

Result, happy days:

[gillywig2]

Did mine on Friday.

The hardest/most awkward job is removing the Rear diff bush. I drilled out the rubber and used a hacksaw to cut through the metal sleeve.

http://my350z.com/forum/engine-drivetrain-and-forced-induction-diy/495887-diy-solid-diff-bushing-install-no-subframe-drop-method-no-c-clamp-either.html