help!! Loud engine knocking noise... :(

[Big_Richard]

It's probably a lot cheaper to find a complete motor on eBay or local wrecker and drop that in.

Nathans got 2 of them lying in his back yard. 

Yes, but these are M117 986 motors,with K-Jet rather than D-Jet.
I think, given the work that was done on Ryan's engine, it would be better in the long run to persevere with the existing engine.

Tim

surley it would be a walk in the park for someone like you to remove and replace heads, you should be able to remove and reinstall intake manifolds blind folded by now 

[TJ 450]

surley it would be a walk in the park for someone like you to remove and replace heads, you should be able to remove and reinstall intake manifolds blind folded by now 

One would think so, but one needs to use new bolts (screws), as having a bolt shear off in the cylinder head during reassembly isn't pleasant. This occurred whilst reinstalling the intake manifold on my 450, during the weekend. 
That note aside, it wouldn't be too difficult, just time consuming.

Tim

[13B]

Would K-jet heads fit on a D-jet motor if you used hydraulic lifters from a K-jet engine?

This is the 2nd time this pair of heads (with the rest of the engine) has appeared on evil-bay: Link

I don't know; which is why i am posing the question....

TJ do you know much about the oil galleries in the K-jet heads (which are not present in the D-jet ones as they don't need to feed the lifters)?

I.

[TJ 450]

Those heads and the rest of the engine look pretty reasonable.

I haven't investigated those oil galleries, as I haven't removed the heads off an M117 (yet). They do look remarkably similar in layout, but whether or not they fit, I don't know.

Tim

[Ryan1980]

Is there anywhere else you can get this bent allen key? The link 13B gave me, ive emailed the guy to enquire about postage to australia and he isnt getting back to me. 

would i be correct in saying theres 14 head bolts that need removing?

I have the right rocker cover off again and power steering pump, and im in the process of removing the exhaust manifold.

What do i do with the timing chain? Remove the sprocker i guess and somehow stop the chain falling down when the head comes off?

[TJ 450]

Is there anywhere else you can get this bent allen key? The link 13B gave me, ive emailed the guy to enquire about postage to australia and he isnt getting back to me.

I've been considering asking the same question. I need a 10mm as well, for the M-100.

would i be correct in saying theres 14 head bolts that need removing?

There is quite a number... not sure exactly at the moment.

What do i do with the timing chain? Remove the sprocker i guess and somehow stop the chain falling down when the head comes off?

Exactly, I would try and cable tie it off to the side somewhere. You should be able to get it to "behave itself" by folding it up and somehow wedging the bundle against the distributor drive sprocket or something, for the time being. You will need more than two hands when removing the head anyway.

Tim

[Ryan1980]

damn that guy on ebay wont post to australia.
perhaps a normal 8mm with a uni-joint will work.

[TJ 450]

It will probably work to remove it, but not for reassembly. It will have to be a good quality socket, though.

Tim

[CraigS]

This might be an option

http://cgi.ebay.com.au/Mercedes-450SEL-engine-4-5L-W116_W0QQitemZ190281789171QQihZ009QQcategoryZ161423QQssPageNameZWDVWQQrdZ1QQcmdZViewItem

[Ryan1980]

Progress - i think !

I have the exhaust manifold off , the power steering pump off. I've removed 12 of the big (8mm) head bolts. I used a uni joint to get around the camshaft.
I also removed one 6mm hex key bolt near the power steering pump. There is one more hex key bolt which appears to need to come out, inside where the timing chain is. This is what's worrying me. I cant seem to get it out, its very hard to get to and im worried i've rounded the bolt

Im really hoping someone will tell me it doesnt need to come out anyway!

Do the bolts that hold the camshaft in place need to come off?

Went and bought myself a torque wrench as well.

[WGB]

Leave the camshaft towers alone and connected to the heads.

Not sure about the 6mm bolt.

I think you will need to remove the cam followers again though and then the sprocket and tie some wire to the chain,

Bill

[TJ 450]

The 6mm bolt will need to come out and they are very easy to round out if the key doesn't fit tightly. What you need is a long 6mm allen key with the top ground off, inserted into a socket. If the key is at an angle to the socket or otherwise not seated squarely it will round out. If I remember correctly, some of the cam tower bolts go right through into the block, although I'm not sure which ones if not all. It would pay to check the service manual here.

Tim

[Ryan1980]

Okay i checked the manual and i believe i have all the required bolts out except for that one 6mm bolt. Unfortunately i think it may have rounded, i did try what you said tim but i think its cactus.
So , any ideas cos i think im really in the shit here !

[Ryan1980]

so um, getting pretty desperate here this bolt could not be in a harder to access spot...
if any of you guys think you could get this damn thing off...  i would greatly appreciate some help...
tim, bill , anyone? haha
or even if you guys know someone who could help?

I had this idea of possibly attempting to pull the head off with the bolt in place, snapping the bolt off... and then just drilling it out once the head's off?

[TJ 450]

I could assist with removal, it's just a matter of when. Send me a PM if you like.

I would not attempt to remove the head in the way you described, as it will more than likely crack either the head, or the block, whatever it goes into. Believe me, it's not worth the risk.
 
Tim