bmwm-power

help with diagnosis please

8 posts in this topic

hi guys

 

525d M57 engine (2.5 diesel no lci 3.0)

Symptoms as follows:

strong diesel fume smells in cabin now for past couple months, been getting worse so ive decided to do something about it

car doesnt feel as responsive from 1500-3500 like before

 

my searches show its likely to be a cracked manifold or broken flexi

 

my question is how can i confirm which one it is before ordering the cast iron manifold off ebay. I want to be sure

 

I would like to do it myself as ive done the swirl flaps so have the "ability" and tools to give it a go

Only thing worries me is snapping the studs on exhaust manifold

 

I have removed the top engine cover, smaller engine cover at back and left them off

I also removed the front undertray from underneath the car , will i need to remove the other undertrays aswell?

 

So whats the next step to diagnose it...when i start the car i can definitely smell exhaust fumes but cant see any smoke

 

also any links to diy guides appreciated

 

thanks

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Do both, and whilst you're there, get the turbo refurbished.  New manifold kits are about £60 upwards and Flexi about £25

Grizzle_E60 likes this

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ok, thanks, what sort of figure am i looking at for a turbo refurb...im thinking "if its not broke dont fix it mode at moment?"

 

and any pointers to diy guides ?

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I think price depends a lot on if you want a swap out unit or if you want to send yours off, I know about 10 years ago I paid about £250 for a refurb at Midlands Turbo who i'd recommend based on my experience but that was 10 years ago and was probably a simpler unit, no VNT that's for sure.

 

The cracked manifold would be obvious when removed but when in situ, I guess you could ask a friend to rev and see if you can see any fumes, or look for black soot there its leaking out.

 

I would definitely have a scan of the codes while your at it to see if can get any more detailed info.

 

How many miles has the car done out of interest?

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Dunno, my mech refurbed mine when he replaced the manifold.

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9 hours ago, Dotcom1970 said:

Dunno, my mech refurbed mine when he replaced the manifold.

 

Who did you use? Refurbishing turbos is very specialist work as the unit needs to be re-balanced after replacing the bearings (they run at upwards of 100,000 RPM if memory serves so needs specialist equipment). You can replace the whole central part and just swap into your old housings but that's basically a refurbished turbo that your swapping out. I have heard that some places just give it a bit of clean and call it refurbished:(

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2 hours ago, Anthonyc said:

 

Who did you use? Refurbishing turbos is very specialist work as the unit needs to be re-balanced after replacing the bearings (they run at upwards of 100,000 RPM if memory serves so needs specialist equipment). You can replace the whole central part and just swap into your old housings but that's basically a refurbished turbo that your swapping out. I have heard that some places just give it a bit of clean and call it refurbished:(

 

Mine just needed new oil seals.

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Quote

How many miles has the car done out of interest?

 

its done just past, 105000

its has full service history although not all by bmw

 

I took it to a local garage yesterday, they put it up on ramp, removed the second undertray which covers the dpf to reveal the flexi. The mechanic said the flexi was fine and no need to replace it.

 

He had a look under bonnet with a light and said that judging from the soot build up on the heatsheild on the car body in the engine bay it was the manifold.

Since removing the undertray there has been a huge reduction in the amount of fumes i can smell (almost non ) . I think its because the fumes are  flowing under the car now as appose to just coming in to the cabin via vents.

He quoted approx £150.00 labour to do it

I think i will study the diy guides online a bit more and order the manifold. i will attempt do do it and worst case i will drop it in

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