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Garage => Mechanicals => Topic started by: 13B on 13 August 2007, 09:42 PM

Title: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 13 August 2007, 09:42 PM
Two annoying things, about by 6.9, just wanted people's thoughts...

The suspension is leaking hydro fluid at the front LH corner and under the front of the engine... it was a small leak when I got it (couple of drops per night) now after 2000km its a small pool of oil (10-20ml I would say) and I'm about to top up my hydro fluid... The 5 cells and other items were replaced under Des' ownership, and I was just wondering if its something like fluid lines need to be re-tightened after a certain bedding-in period or something....?

Also, when cold it revs annoyingly high, its only 1400 or so rpm, and when it warms up it settles down to a normal 500 rpm blob-blob-blob idle... is there any way to adjust the cold idle speed to 900 or 1000rpm?  At 1400rpm putting the car into reverse feels like its trying to remove the diff from under the car...  BTW I'm going to do the styria disconnect 9th fuel injector mod tonight...

Oh and lastly the sunroof leaks but there's nothing inexpensive that can be done about that... :-(

I.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 14 August 2007, 01:34 AM
Oh and now she smokes when she gets a dose of hydro fluid on the exhaust manifold :-/

Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: Andrew280SEL on 14 August 2007, 01:42 AM
Des?  :D

I think he's gone for good. Taken off into the inescapable mystic zone that is RR land... :(

Anyway, I think that cold rev speed is quite normal though, all our w116's rev like that when cold...but if you really hate it I'm sure someone will be able to tell you how to lower it.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: john skene on 14 August 2007, 04:50 AM
When adjusted correctly all 116's should have a steady idle whether hot or cold. I have read how to do it in the manual, but I think it is best to leave it to an expert.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 14 August 2007, 06:32 AM
Thanks guys.... getting my "violin" out I'll just bitch for a moment that I've just moved house and am snowed under at work and completely exhausted.. unfortunately the last thing I have time to do is carefully analyse the suspension and sunroof, so I'm going to pay a specialist on Thursday to go over the hydro system looking for loose and perished hoses... i need the car to get to work... for the moment I'm back to the RX7...

The cold idle speed is something I think I can handle if someone can explain to me where the adjustments are and what I'm looking for... i't can't be that hard to adjust..

As for the sunroof, when I drive in the rain or it rains heavily, water comes in from above the sun visor, down the visor and into my lap in a very undignified way.  I think even once I saw some water come in above the centre rear-view mirror...  Have to re-check my receipts but I'm pretty sure I read Des put in F&R window seals... in any case its not a big issue yet as in my new house I have a large enough garage to park it in, and work is under cover, so the car doesn't cop as much rain as could be.  Sorry to you purists who won't drive their 6.9s in the rain, this all must sound awful to you but I did buy my car to be a daily driver, not sit around looking purty waiting for dry weekends to go out and enjoy it.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: Bandolero on 14 August 2007, 06:39 AM
Ha Ha, not all of us "baby" their cars.
I live on a dirt road and the 6.9 is sideways more often than not!!   ;D
Also, I drive it in "hail, rain or shine."

The front water leak could be the windscreen seal.

Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: oscar on 14 August 2007, 08:11 AM
13B, sorry to hear about the leaks. 
Re the over revving, I've been told previously with d-jets the auxillary air valve lets too much air thru.  K-jet's are similar though I have no experience.  But here's an easy mod  I was told about and that I've tried previously with success.
You just need to restrict the air flow to the aux air valve and it can be done without bashing down the aux air valve.  I was told on the MBCNSW forum to place a hollowed spark plug thread into the intake hose of the aux air valve.  I instead used a 3cm piece of 7.5mm injector fuel hose.  It reduced the air flow enough to reduce the revs significantly from the 1500-1800approx cold idle I was getting in the 350.  The hose to the k-jet aux air valve looks different and maybe bigger, but try experimenting with some kind of thick hollow tubeing inserted into the aux air valve intake and see how you go.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 16 August 2007, 12:06 AM
Its the hydropneumatic pump on the front of the engine, its leaking...

So they're sourcing a good used pump so this should be fun... here's hoping the same pump is used on all self-levelling V8 engines...


Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: CraigS on 16 August 2007, 12:13 AM
You can get a rebuild kit for these, but they are damn difficult to install and get right. They operate at around 2000 psi, so it is critical that they are installed correctly, or they will leak.

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&ih=003&sspagename=STRK%3AMEWA%3AIT&viewitem=&item=130142097928&rd=1

Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: AMG69 on 16 August 2007, 12:24 AM
I'm sure Des had work done on that pump didnt he????  major deja vus......I thought it was mentioned in some old threads.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: CraigS on 16 August 2007, 12:33 AM
I think you're right, but Tasmania is a long, and expensive way to go for a warranty repair - unless you take the pump off and send it to them, and then the car is off the road for who knows how long. I would try and find one at a wreckers. Try Dave Walton in Brisbane. He will send it to you. His number is 07 - 5532 8888.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 16 August 2007, 12:38 AM
QuoteYou can get a rebuild kit for these, but they are damn difficult to install and get right

I was told just that, but the person looking at my car says they've had better luck with good used pumps, so he's sourcing one of those...

Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: oscar on 16 August 2007, 03:04 AM
Craig, that's incredibly cheap.  I paid $90AUD but it also had a second large O ring of a different diameter.  But my old pumps only have one.

13B, where abouts from the pump is the leak coming from?  It sounds like it's leaking externally, I wonder if it's leaking internally as well.  Something I think I told Des was to make sure the inlet fitting is very tight.  The outlet banjo fitting has to be tight too though not as much and there should be two copper seals, one either side of the banjo.  The pump will leak externally if attention isn't given to these connections.  Especially the inlet pipe.  It would only leak when the engine was started.  No stripped threads or scored contacts, the only way it would stop leaking was to tighten the locknut of the inlet pipe very tight.

I rebuilt mine last year and I can tell you I haven't lost a drop since.  Yay, but it was an expensive road getting there as far as going thru $300+ worth of hydro oil before I worked out what or was told what was going on.  Are you losing everything to the floor?  My rear seal on the pump's shaft was leaking causing oil to go into the sump.  I don't know where the oil goes in the case of a 6.9 since it's a dry sump and all.  Anyway, I've got a spare from a 6.9 that I'll be rebuilding next week hopefully.  My spare worked for a few months before it too started leaking thru the rear seal but not as bad as before.  You may have to get a recon one just to save oil and if you want, I can give you the one off my 280S.  But I'd recommend getting a kit to reseal the old one.  In the meantime, the 280S one is available for indefinite loan if you want it.  As far as I know it doesn't leak internally or externally.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 16 August 2007, 06:28 AM
Thanks for the offer Oscar, I'll not worry about it for the moment, as the guy looking at my car reckons he can source one and get the car back on the road tomorrow.  I'll see what he turns up and make sure I get the old one back.  In the back of my mind a good used one is probably not the best way to go but if mine was rebuilt and it hasn't lasted, this gives credence to my repairer saying he's done better with good used pumps than rebuilding old ones.

I'll have to check if my engine oil is especially thin due to hydro fluid ending up in it...

My previous 6.9, #3904, leaked power steering fluid, my 450SE leaked engine oil... they always leak something methinks.

Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: CraigS on 16 August 2007, 07:16 AM
As they say about Buick's, if they're not leaking, their empty !
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 16 August 2007, 06:00 PM
2-3 drops a night would be OK for me, just put down a drip tray in my garage and top the fluids up every fortnight when I check other fluids (water, oil, brake fluid and washer water) but 1 litre of Penrite MB-15 in the 13km drive from work to home is just too much.. even for a 30 year old car.

Hope everyone has their fingers crossed for me, I'll let you know how I go after lunch.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: oscar on 17 August 2007, 06:31 AM
Quote from: 13B on 16 August 2007, 06:00 PM
Penrite MB-15

What's this then?  I thought from previous advice that anything other than FEBI or Lemfoerder hydro oil will stuff seals in struts.  Especially AT fluid.
What are you using 13B?  I mean what's the go with the Penrite stuff?
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 18 August 2007, 04:00 AM
MB 15 is Penrite's special hydro fluid for Mercedes Benz self levelling systems.  It ranges from $8.50/ltr if purchased from Penrite factory in Melb, to $20/ltr from Bursons.  The place replacing my hydro pump sells it for $12/ltr... Trouble is most knuckle-dragging Penrite stockists don't know it exists, and Penrite's web site makes no mention of it either.

Have a read:

http://www.penrite.com.au/files/NJVEX1RTUZ/MB%2015.pdf (http://www.penrite.com.au/files/NJVEX1RTUZ/MB%2015.pdf)
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: oscar on 18 August 2007, 04:26 AM
 8) 8) 8) Thanks for that.

Cheapest Febi/Lemfoerder I've bought in Aus was $20/L at MBSpares.  My mechanic charged me $34 and the local spares dude that wants my business made a phonecall and came back with $50 delivered in a coupl-a-days.  Struth!!

I can guarantee I wont be able to get the Penrite stuff locally any cheaper than $20 but I'll keep it mind and source some from the city next time I've drained a system empty and give it a try.  I've got Lemfoerder ATM and I suppose it wouldn't be a good idea to mix brands.  Very handy to know there's an alternative.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 19 August 2007, 06:06 PM
$308 drive-in-drive-out to repair, not bad, this included a good used hydro pump and 3 litres of oil, and labour.  Will cover some km and let you know how it goes.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: Des on 25 August 2007, 07:15 AM
Just read this thread, I hadn't been alerted to it earlier,

I did mention the sunroof leaking here a long time ago, when I put the car through a car wash,

some people here and on the M100 site mentioned that it is normal under the high pressure of these washers for the seals to leak.

As I never drove it in the rain, well maybe once or twice in over 1 years ownership, I never noticed the sunroof leaking.

I hope, contrary to the feeling I got reading the posts earlier in this thread that I sold Ian a lemon and bolted with his money.

Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 116Benz on 25 August 2007, 07:48 AM
Quote from: Des on 25 August 2007, 07:15 AM
Just read this thread, I hadn't been alerted to it earlier,

I did mention the sunroof leaking here a long time ago, when I put the car through a car wash,

some people here and on the M100 site mentioned that it is normal under the high pressure of these washers for the seals to leak.

As I never drove it in the rain, well maybe once or twice in over 1 years ownership, I never noticed the sunroof leaking.

I hope, contrary to the feeling I got reading the posts earlier in this thread that I sold Ian a lemon and bolted with his money.



Des, I'd be really surprised if anyone here really thought you sold a lemon and bolted. You lavished attention on the car as would any other enthusiast. Regardless, things perish, things break no matter what car it is.
P.S when are you going to show us pics of the Bentley?
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: 13B on 25 August 2007, 05:23 PM
Nah its all good Des, I don't expect perfection in a 28 year old car.  The car's no lemon, and with the replacement pump the suspension is better than ever.

As for the sunroof, well, lets just say I've never owned a 116 that hasn't had a leaky sunroof.

For purpose I bought the car for, now the suspension has stopped bleeding, its still the car I'd prefer to drive each day.

I.
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: Andrew280SEL on 25 August 2007, 08:34 PM
Quote from: Des on 25 August 2007, 07:15 AM


I hope, contrary to the feeling I got reading the posts earlier in this thread that I sold Ian a lemon and bolted with his money.



I hope that wasn't because of my post.... :(

I wasn't implying anything like that, I was referring to your whereabouts on the forum as Ian might have wanted to ask about the little issues and what you know about fixing them.

Sorry if I caused any confusion  :)
Title: Re: Help, my car is bleeding... and warm up is too noisy!
Post by: Des on 25 August 2007, 09:18 PM
That's ok guys,
i may have miss read it all,

I am glad Ian is happy with his car


as for Bentley pictures, my camera is givng me the gripes at the moment, will try with a friends this week