AMG3.2

You got it man.

Sweet -- feel free to write up your experience in this thread. As this car ages, and becomes cheaper, I think we'll start to see a lot of DIY'ers taking this job on, and this could be an awesome all around thread for them.

Jasonoff

Revised OE head bolts already has sealant on the head flange.

AMG3.2

I didn't see any sealant on mine..?

Jasonoff

There was a film of white paste. You can see it in this pic. It squished out a little when torqued.

Mag1c Carp3t

Not sure about your cls but the c63 motor is required to be removed for studs due to clearance issues when installing the heads on studs. If you opt not to use the water jackets than the studs can be installed with the heads on. Also studs are not required as the revised headbolts are plenty for a blower.

Jasonoff

Who told you that? The head has guide pins that hold it in place. You just drop the suds in. You don't lift the head over pre-installed studs.

Mag1c Carp3t

Yes that is true. David Lehman from eurocharged recommends the motor to be removed due to the water jackets being used to ensure cleanliness.

AMG3.2

Ahhh gotcha. I didn't know that was gasketmaker/sealant. Added a bit more just for the heck of it.

Jasonoff

Your comment doesn't make sense. What does "due to the water jackets being used" mean?

The water jacket is a cavity/channel inside the head that coolant flows through. It just so happens the bolt shaft passes through that cavity as well.

Sure, pulling the engine out to work on while it's bolted to a stand will help keep things clean, but it's absolutely NOT necessary.

Mag1c Carp3t

Yeah that's probably what he was talking about just keeping things clean.

KECLS63

Really hope you will write this up. Interested in how it came together.

AMG3.2

Fantastic video on cam timing:

BLKROKT

You know that your car is about to blow up any minute because you did them one-at-a-time, right?

AMG3.2

That's what I hear

Jasonoff

Nice, that guy has a bunch of decent vids.

AMG3.2

He does. I just downloaded them all so I don't lose them. I hate when there's a good vid out there that get's deleted. If I had seen that timing vid prior to taking this on, I'd have been so much more confident.

KECLS63

Really curious with an 2007 cls if you want to install the arp head studs as preventive measure instead of newer head bolts does the motor have to be pulled to have proper access?

Jasonoff

No. Sliding in a stud is no different than sliding in a full bolt.

AMG3.2

And by the way, if you're looking for a more in depth DIY (step by step), I've started a site (www.diytechnica.com) where you can purchase a more in-depth DIY for 10 bucks. But if you don't want to go that route, happy to answer any questions you may have about the process here.

KECLS63

Oh cool! The DIY write up interests me! Eurocharged guy in Houston said he thought the motor had to be pulled to do the stud replacement. That it doesn't look s good news.

AMG3.2

Cool. Well check it out then.

Re: pulling the motor, I'll assume they meant heads, but if the head gasket hasn't been compromised (aka not consuming coolant), the consensus is that you should completely fine replacing one bolt at a time.

KECLS63

No he was saying pull the whole motor out of the car to do the stud replacement not just the heads. Had to do with clearance of studding the block with arp studs to then put the heads on. You would not have clearance to put the studs in and then get the heads over the studs and leave it would n car to do that.

Jasonoff

Heads have a dowels to hold it in place. You put the studs in after the heads are in place.

It was likely this guy. https://mbworld.org/forums/c63-amg-w...ml#post7262323

Maybe you just misunderstood or he mislead you. 50:50 on that one lol...

KECLS63

Could be. But it got my attention when he said pretty sure you have to pull the motor I explained to him that others had done the mod in car. It was late in the day when I spoke to him and not sure he was "the guy" to talk to.

roadkillrob

Certainly the motor does not need to come up, while true that there is not enough clearance to get the heads onto the studs after the studs are installed, ARP recommends installing the heads first then the studs, so there is no issue there and like others have said, you just put the studs in just like head bolts with the heads on and if you don't have a coolant leak, the heads do not need to come off, you can just do one bolt at a time and replace with a stud.