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325d/330d Glow plug replacement
Published by coopersim
02-02-2013
325d/330d Glow plug replacement

Short guide to explain the process used to remove the glow plugs on pre LCI 6 cylinder 325d & 330d M57N vehicles.

This guide can be combined with the thermostat replacement guide available here, courtesy of shane55: http://www.e90post.com/forums/showth...ght=thermostat

It can also be used to aid in the replacement of the glow plug controller unit on the M57N engine.
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File Type: pdf 325d Glow plug replacement.pdf (4.11 MB, 2268 views)
  #1  
By superflyguy9 on 02-03-2013, 07:30 AM
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Gold Standard DIY write-up

That my friend is exactly how a DIY write-up should be......You just need to take the rest of the car apart now and document in the same way ;-)

Fantastic work
Last edited by superflyguy9; 02-03-2013 at 07:32 AM. Reason: didnt do the ratings doh
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  #2  
By coopersim on 02-03-2013, 05:15 PM
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Quote:
Originally Posted by superflyguy9 View Post
That my friend is exactly how a DIY write-up should be......You just need to take the rest of the car apart now and document in the same way ;-)

Fantastic work
Thanks for your kind words. Hope it's useful to you
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  #3  
By Najt on 04-21-2013, 03:50 PM
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thank you
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  #4  
By tmarshall57 on 07-28-2013, 04:28 AM
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Thanks for this guide. I used it last weekend for the purpose of replacing a glowplug on my 2007 e90 330d. I found a few differences which I have included below together with some tips which others may find useful.

I could not remove the rear engine cover. I fought with it for over an hour but I found it impossible to remove until I removed the housing below the windscreen into which the two stabiliser bars fit. This requires the removal of the edge trim fitted to the panel containing the windscreen wiper mechanism and then the stabiliser bar housing, held on by 3 bolts can be removed by firmly pulling. I could then just manoevre the rear engine cover into a position that it could be removed.

On the rear of the manifold there were 2 small brackets holding wiring looms in place. One is held by a 10mm stainless bolt and the other by a torx bolt. I used a mirror and torch to help locate and identify these.

On the right side rear of the manifold (when facing the engine) there is a vacuum pipe connected to the swirl flap vacuum mechanism. This needs to be removed. Both the EGR and this vacuum pipe are difficult to remove however there is enough slack in the pipe length to cut the pipe as close as possible to the vacuum mechanisms.

On the RHS of the engine I needed to detach the oil dipstick holder and a wiring loom conduit from the bracket bolted to the RHS of the manifold. I could then access the bolt to remove the bracket.

When lifting off the manifold please be really careful that none of the orange rubber/metal washers drop from underneath the manifold. There are seven of these and they are located at the bottom of the holes in the manifold which accommodate the 7 studs on the RHS of the cylinder head from which you removed 7 11mm nuts. One of these washers dropped off when I removed the manifold and I could not find it. I removed the undertray, searched for hours with a torch and purchased an endoscope camera off ebay to search within the inlet ports - all to no avail. I never found the washer or one of the EGR valve bolts which I also dropped.

I had heard that Glowplugs can be seized and can snap when being removed. I found a useful document produced by Beru which specifies the breakage torque and recommends setting your torque wrench to approx 34NM when removing the plug. If the plug does not release at this torgue then repeated application of heat and release fluid is the way to guarantee easy removal. Mine came out easily. The link to the Beru PDF is http://www.beruindia.com/pdf/GLOW%20PLUGS.pdf

The orange gaskets were in good condition and I reused all gaskets.

My EGR Valve was only slightly carbonised and it took me only 20 minutes to clean it. My car has done 145,000 miles.

There was signs of oil (Diesel) leakage around the swirl flaps. I removed these, cleaned them up and replaced them using Tiger Seal to hopefullly prevent further leakage.

Given the lost washer I held my breath before starting the car but the car started first time with no undue noises.

I hope this helps others

PS - I eventually found the orange washer some months later - sat on a ledge near the starter motor. I also found the EGR valve bolt on the radiator section of the undertray! All places I had examined numerous times previously!!
Last edited by tmarshall57; 06-09-2014 at 06:01 PM.
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