OM642 EGR clean

[Wighty]

View attachment 72489

As requested...

amazing how much space the same engine in the E class has for room to work/access

 

[Wighty]

@Wighty was this an OCD job or was there an issue.
Have you done the PCV yet?

OCD job buddy , yes I did the new metal pcv pipe today on another thread . I also have an updated pcv unit that’s been fitted for a year or so

Om642 metal breather cap replacement

Bought one of these the other day because a couple of people mentioned they are worth replacing . My car has 114k now so for sub £30 I treated her . I removed the 3 bolts for the pcv itself first and pushed it out the way then two bolts to remove on the new metal breather part and gently...

forums.mercedesclub.org.uk

 

[mioba]

OCD job buddy , yes I did the new metal pcv pipe today on another thread . I also have an updated pcv unit that’s been fitted for a year or so

Om642 metal breather cap replacement

Bought one of these the other day because a couple of people mentioned they are worth replacing . My car has 114k now so for sub £30 I treated her . I removed the 3 bolts for the pcv itself first and pushed it out the way then two bolts to remove on the new metal breather part and gently...

forums.mercedesclub.org.uk

ha ha Love it, I have no more OCD jobs on my 642.

 

[mioba]

View attachment 72489

As requested...

wait till you see whats under the scuttle panel

 

[oigle]

Sure makes electric look more and more sensible. Oh for the old simple days. Maybe less efficiency but at least one could easily maintain it.

 

[Noddy 99]

Inspired by wighty, I removed my EGR valve and gave it a clean today. It was formidably resistant to coming out: the trick of loosening the bolts and then revving the engine failed miserably so I had to resort to some serious pounding with a wood chisel.

Anyway, it probably didn't need doing as it turned out. There was a thin coating of soot but superficial only - nothing that could be prised off. I cleaned it anyway with Mr. Muscle Oven Cleaner and a really handy brush which I got from B&Q.

Nice and sparkly(ish) now...

 

[Wighty]

Inspired by wighty, I removed my EGR valve and gave it a clean today. It was formidably resistant to coming out: the trick of loosening the bolts and then revving the engine failed miserably so I had to resort to some serious pounding with a wood chisel.

Anyway, it probably didn't need doing as it turned out. There was a thin coating of soot but superficial only - nothing that could be prised off. I cleaned it anyway with Mr. Muscle Oven Cleaner and a really handy brush which I got from B&Q.

Nice and sparkly(ish) now...

Good job buddy , it was a lovely sunny day here so I managed some tinkering as well

 

[such]

Resurrecting this thread - got a few errors pointing to a stuck closed EGR valve - original, never been out before in 189k. Wish me luck..

 

[ajlsl600]

Helicoil. Easy job in alli if there is access done right, stronger than origional. I helicoiled my lazer sight onto my berrata 9mm inox. Thread lock is not good in alli if you ever need to get bolt out again. .

 

[onefortheroad]

Resurrecting this thread - got a few errors pointing to a stuck closed EGR valve - original, never been out before in 189k. Wish me luck..

If and when you get it lifted a few mm , I used a woodworking chisel to get mine started , get some penetrating spray in there , twist and lift . It's the rubber o ring that seems to latch on . From what I can remember

Good luck.

 

[Wighty]

+1 for the chisel , watch the very soft metal though .
Might be worth getting the engine very hot first and spraying release lube in the gap before you start .
I also used a piece of wood and a hammer to knock the egr left and right slightly.

 

[Doug1234]

There was a video on YouTube a long time ago but I’m afraid I’m unable to find it where someone got some steel bar and basically made a C spanner type affair that had two steel dowels that fitted into the bolt holes on the egr valve and then they could rotate the valve gently back and forth and remove it.

 

[supernoodle]

Loosen the bolts and go for a drive, that got my stuck valve free.

 

[such]

some very helpful tips here, thanks - I'll be prepared for it to be well stuck so I'll try @supernoodle suggestion first.

 

[such]

Well managed to get the valve to turn about 1/4 inch but cannot get it out. I used penetrating spray and loosened the bolts took for a drive. When the valve turned there was a steady stream of coolant squirting out - I was not expecting this as it wasn't mentioned anywhere - is this normal? There is no coolant hose connected to the valve as far as I can see. Also can't get it to turn back to screw back in!
I've left it now as it's pi55ing down - will have to fix tmrw as need the car for 12pm...

 

[onefortheroad]

Well managed to get the valve to turn about 1/4 inch but cannot get it out. I used penetrating spray and loosened the bolts took for a drive. When the valve turned there was a steady stream of coolant squirting out - I was not expecting this as it wasn't mentioned anywhere - is this normal? There is no coolant hose connected to the valve as far as I can see. Also can't get it to turn back to screw back in!
I've left it now as it's pi55ing down - will have to fix tmrw as need the car for 12pm...

You might need to use a light hammer on it , to get it out all the way . Dont let it boss you . It might shrink a bit when it cools down

 

[such]

You might need to use a light hammer on it , to get it out all the way . Dont let it boss you .

I have been but it's awkward trying to get the access to hit it in the right place. is the coolant leaking out going to be a problem? Thanks for the quick reply.

 

[onefortheroad]

I have been but it's awkward trying to get the access to hit it in the right place. is the coolant leaking out going to be a problem? Thanks for the quick reply.

I've no idea what that could be , probably exhaust gases ??? When I popped mine out on the c250 it was a o ring that was bonded to the housing ,stopping it from coming out . I tapped mine round one way then the other , pulling up on it as I went , eventually it gave in.

 

[such]

I've no idea what that could be , probably exhaust gases ??? When I popped mine out on the c250 it was a o ring that was bonded to the housing ,stopping it from coming out . I tapped mine round one way then the other , pulling up on it as I went , eventually it gave in.

There was definitely exhaust gases coming out as well as what looked like water spraying out, which eventually stopped

 

[such]

Right - got the valve to move and then saw there is a hose to the bottom left which is not on properly hence the coolant leak. I've had to top up coolant a couple of times in the last month so this could be be the reason. I can't access the clips to remove the pipe so have refitted everything back. Not having a great day - this plug has broken off the housing due to the brittle plastic. What is it and can I still drive the car?
I overtightened the top bolt and the flaming housing has cracked - it still feels secure. I may just get the damn thing replaced now.

I have the AA coming out to have a look at the coolant leak - I also have parts and garage cover and have the fault codes for the stuck egr.

My cay can only get better...