Gtrawr

went to couple mechanics im getting more and more different answers thought id join the fourm and have you guys hear what is going on, im an import type of guy but was always inlove with the e55 AMGs so i picked one up ... issues that came 2 days into owning the car..

-water pump blew = replaced it with a new one from mb

-found sludge in oil = condensation .. just did 4 oil changes

- oil only had about 4-5 L < when drain from previous owner

-coolant is being burnt out of the exhaust = sweet smell out of the exhaust a bit of white smoke not to much>? loosing coolant ? no leaks just painted garage floor not a single drop (hg) maybe?

- after all this i hear a knock and im shocked.. engines idles smooth i know these engines are loud buddy of mine owns one beats on it... i own a r32 gtr known for there knocks this knock is ab normal only happens on load , or when idles at 2000 - 4000 rpm

engine runs smooth idles smooth

here is a video

let me know your thoughts and what i should do ... already got quoted 10-16k for a full engine rebuild honestly do not see it worth it unless im keeping the car and go all out .. cannot find a single parts car through out Canada for a new engine.


http://vid1290.photobucket.com/album...pskz58fjg5.mp4

StarvingArtist

Those are all the symptoms of a head gasket leak. Since it idles smooth, there might not be any damage yet. Stop running it. There are some tests you can do, but I would just pull the head and look at this point.

Gtrawr

im getting told the bottom end is damaged , if u listen to the video half way through u hear a rod knock like sound which is what is stopping me from doing a hg job

Hulk

Do a compression test

Gtrawr

ill do a compression test soon here , other than that the engine runs and honestly had all its power but when i heard that knock i drove it home slow , and it idles smooth with no knocking only when revving up to the 2k mark , i thought it was valves but my rb did the same with the rod knock but worse

W219CLS55

Remove supercharger belt and rev engine again. Wishful thinking - maybe it's a bearing in the supercharger!?
I saw a video the other day and it kinda kinda sounded like that, but louder. If it was a bearing on the rods it would be louder

StarvingArtist

It sounds like steam expanding and being compressed at the same time. One of your spark plugs will be cleaner than the rest. Rods knock worse when you let off the throttle. Really, stop running it.

Gtrawr

took the belt off still had knocking sound , pulled all the plugs there all white the last 16th plug left hand side of the motor 4th cylinder basically had corrosion on it < guessing thats the bad boy burning coolant cracked head or ? hg i assume and also can that be the cause of my knock

2000UZJ

I think a couple of 60-130 pulls would do that engine wonders. Also, keep revving it up with the knock. You'll hopefully grind down whatever is in there and make it smooth again. Maybe another oil change will fix it too...

It's not my money nor my car, I don't care what you do. If I were in your shoes I would gear up to pull the top end of the motor off and start inspecting.

Stop running it, it's not going to fix itself magically overnight

Gtrawr

thanks tips ^ did i say i was driving the car no. i took a quick video shut it off tried couple more things sorry to tell u but regardless of the noise its not there unless the engines under load. tried couple things already know it has to be torn apart hence why its parked and already in pieces ?

2000UZJ

Good. Keep us posted and best of luck! I hope it's nothing serious

Gtrawr

any ideas tho to what it could be? just an assumption since im digging in

Dublinoh

Sorry to hear, welcome to the forum. I hope it is limited to the head gasket.

new55

head gasket does not make a knocking sound -- probably a connecting rod or a wrist pin .

StarvingArtist

I'm sorry, but this is incorrect. Water in the cylinder expands and makes a horrible detonation sound, not always, depends on the leak. I've seen it before.
Rods have a very distinctive pattern, they tighten up under load, and knock the worst just as you start to let off. That point between accel and decel. I've never seen a wrist pin fail, so can't speak to that. It's rare.

My grandmother had a Toyota with a slight detonation knock. Took years and 50k miles before I figured it out. I bought all new gaskets and timing belt stuff before I took it apart, when I got it open some of the head bolts were loose and it looked like I could have just tightened them up.

It will be the cylinder with the anti-freeze residue on the plug. It's the piston that will be steam cleaned. I forget stuff.

new55

i did not know that know that - my experience is limited but its what i have seen - either way it will need to be torn down and inspected, - good luck

Gtrawr

so question is worth the risk of digging in , getting the heads machined clean the block etc , putting new gaskets , new chains get the tools needed for sure on this , and hopeshe isnt knocking , im thinking of ripping the oil pan off see if theres anything that will move by hand rod wise , i checked all the oil filters there is no metal particles drained or in the filters

StarvingArtist

Try to find the cause of the failure as you take that side apart. Look for a stretched head bolt or signs that it's been worked on before. Tool marks, scratches, etc.
I don't know if the head bolts are reusable, but I would replace the ones around the leak at least.

gjunon

Have you got it compression tested yet?

Rocman8

What do we mean by "all the oil filters" ?

Dublinoh

He did do four oil changes.

Rocman8

Ah hah. Got it!