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benniferj

Member Since: 20 Oct 2016
Location: Basingstoke
Posts: 361

My odd engine config and some belt issues

Changed my pas & alt belts yesterday and with normal (good) belt tension I now have noisy steering but no alt light or squeal/slip. Before changing belts everything was fine and I re-bled steering box/pump and am pretty sure that isn't the issue.
My steering is groaning and losing PAS, at very low speed steering is heavy and no hydro assist.

To introduce my engine: 200tdi Disco in Defender '85. However it has a original 2.5 manifold leading to having a top mounted Garrett turbo rather than traditional Disco low mount (so it looks more like a real Def 200 engine). This leads to some interesting intercooler routing. I believe my alternator is Disco 200 (130amp uprated) and sits in a fairly low position - almost horizontal with the pulley it runs off of. I had to modify the slide bracket to allow extra slide for proper tensioning.

I technically don't know what model the belts I have replaced are: They came spare with the vehicle but are Bearmach/Dayco quality ones.

Questions:
- Are Defender 200tdi pulleys/belts and wider or narrower than Disco 200 ones?
- If an Alternator belt was used as a main drive belt by mistake would this cause problems (are the 2 belts different widths normally?) - I ask as the lengths I had were basically perfect but they could be totally wrong
- If belts are the wrong width then would that lead to the symptoms I am describing?

I will try and source normal Disco 200 belts tomorrow and fit, I can't really do much tonight as the vehicle is at my flat with minimal tools.

Thanks for any help and just ask if I can explain anything in more detail!

The only reason I did the change was to sort out the sketchy intercooler and air box routing/mounting from my previous owner - I had spare belts and hadn't changed them for the last year so thought I should time stamp their replacement asap!

21st Feb 2017 6:54pm

ibexman

Member Since: 13 Dec 2008
Location: Essex
Posts: 2945

Go online and compare belt pat numbers

21st Feb 2017 7:52pm

Gonarezhou

Member Since: 08 Mar 2015
Location: White River
Posts: 178

2015 Defender 110 Puma 2.2 SW Alaska White

Your problem is the "bane of my life" with my 1989 with a 200 Tdi disco engine! I will take some photos for you ....but basically I think you have to make your own plan.

Good luck

21st Feb 2017 8:32pm

Retroanaconda

Member Since: 04 Jan 2012
Location: Scotland
Posts: 2656

If I recall correctly on a Defender 200Tdi the alternator/water pump belt is a 10mm and the PAS pump belt is a 13mm, however the Disco lump has a very different belting arrangement so that may be of no use.

Post a picture of your belt setup so we can see what you have, I am struggling to picture it from your description.

Standard Discovery 200Tdi belt setup:

21st Feb 2017 9:06pm

Retroanaconda

Member Since: 04 Jan 2012
Location: Scotland
Posts: 2656

Defender 200Tdi setup for comparison:

21st Feb 2017 9:07pm

NickMc

Member Since: 01 Oct 2014
Location: Norn Iron
Posts: 1628

200 Tdi belt system is a pretty crap design to start with and now theyre all at the mileage where the other compontents are getting very worn, inspect everything carefully and buy good quality belts like "Gates" or "Conti". I did a set a few weeks ago and remember being a bit shocked at the price they'd climbed to, odd sizes.

22nd Feb 2017 12:44am

benniferj

Member Since: 20 Oct 2016
Location: Basingstoke
Posts: 361

Thanks very much guys!

I have replaced belts with standard config Disco 200 main/aux and also re bled my steering pump and it is all working well.
I think I had replaced with a pair of Def 200 belts which were similar length but not the same tooth depth which was causing too much resistance. The pump had also got some air in it which I attribute to me not topping the reservoir enough when I did a quick bleed the other day.

I now have a nice pair of Conti belts on there thanks to Euro car parts. I think my only confusion now is that I am running a Def alternator on what is otherwise basically a Disco 200 with wrong manifold and turbo.

Cheers!

23rd Feb 2017 6:18pm

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