E36 questions

E36 questions

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Discussion

BGarside

Original Poster:

1,564 posts

137 months

Thursday 23rd November 2017
quotequote all
Posting for suggestions.

My '95 E36 328i is making a single clunking noise when turning into corners or changing cornering direction RH to LH or vice versa, as well as when setting off from standstill in 1st gear. The noise seems to be coming from the rear of the car. I assume some bush or balljoint is worn somewhere but would like to narrow down the most likely candidates.

Although the car is 22 years old the mileage is only 39k miles and so I assume age-related degradation rather than mileage-related wear. The rear shock top mounts have been replaced last year but everything else is original.

I know rear trailing arm bushes are prone to failure on these, but is there any other problem area I should check out? Also what is the best way to test the various bushes and balljoints for wear?

I assume the issue is not a worn propshaft coupling or bearing as I cannot get the noise to repeat by accelerating repeatedy and lifting off the power.

As a secondary question, is it necessary to stick to original BMW coolant (at £11/litre!) with the M52 engine or could I use any blue-green 2 year life antifreeze?

Thanks for any suggestions.

Ben

helix402

7,861 posts

182 months

Thursday 23rd November 2017
quotequote all
Coolant is G48.

SebringMan

1,773 posts

186 months

Friday 24th November 2017
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Unless you don't care about the car I always put G48 into most cars now. If you that coolant is pricey don't go to Ford ; their 10 year coolant is very pricey!

I say that from the last 3 coolant changes I've done. Almost everytime cheap blue coolant always has rust in it the next time around ; the corrosion inhibitors are simply very poor. I've not suffered that issue with OAT based coolants, G48 or genuine coolants ; I suspect Comma's other coolants would be fine too.

It's no suprise some cars gain a reputation for having 'cooling' issues...

BGarside

Original Poster:

1,564 posts

137 months

Tuesday 28th November 2017
quotequote all
Thanks for the advice on the coolant guys.

Can't find the source of the suspension noise so it's off to my local Indy tomorrow - another bill.....

SebringMan

1,773 posts

186 months

Tuesday 28th November 2017
quotequote all
The clonking could be down to anything. I doubt it is the RTABs ; the car would drive like a dog IMHO.

It may be the subframe bushings but again the car would have issues like tramlining etc.

I hope for your sake it's not the Rear Axle Carrier Panel (RACP) sustaining damage.

TroubledSoul

4,599 posts

194 months

Wednesday 29th November 2017
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Is the clunking at low speed when turning? if so, would I be right in guessing your car has an LSD?

Try some higher quality diff oil if that's the case thumbup

BGarside

Original Poster:

1,564 posts

137 months

Sunday 3rd December 2017
quotequote all
Thanks for replies. No LSD on my car but I think my local indy put the thicker 75W140 oil in the diff, possibly by mistake.

Boot floor looks intact, but most of it hidden under sound deadening so not sure if I can actually see diff mounting area.

Local specialist thinks noise actually from front suspension (hard to tell from inside car) so has tightened everything up and reckons noise gone. I'll try it on Monday.