Howto change a head gasket on a 12v 3ltr M103 - Page 3

Ian B Walker · 13-11-2008, 11:50 PM

Quote:

Originally Posted by dka-66

I just found the site, read through this post, and had to register so I could ask if there has been any progress on this and if there has if the poster going to give an update.

As far as I am aware everything is ticking over nicely. Ask JPSKiller, it was and is his car. I always leave the exhaust manifold on the car as it gives you some purchase to break the head gasket seal. There is enough room to unbolt the inlet manifold and pull it to one side. Doing this helps with vac line assignment.

Ian B Walker · 14-11-2008, 12:02 AM

Quote:

Originally Posted by ms500

If only the M104 was as simple

Actually it is. The secret of a 104 engine is to set the crank at 30 degrees and lock the cams in the locating holes. After that, the procedure is very similar. However be warned that the chain idler cog retaining screw is a left handed thread. Next time I do a 104 head I will write it up.

ps2cho · 03-01-2009, 05:19 PM

I'm starting my Head Gasket replacement today...finally!
I'll let you guys know how it goes. Gonna try and take your advice about leaving the intake stuff on.

ps2cho · 03-01-2009, 09:17 PM

Mid way through. Coffee break!

Possible Misfire cause? Cracked!!

New Belt going on now

Gonna remove the head without the intake side attached. As far as I understand it is possible, but a little more tricky. Less removed = less potential lost items and problems in general.

Thinking of getting my valve cover and exhaust manifolds powder coated too. Silver valve cover and black exhaust manifolds. What do ya guys think :naughty:Mid way through. Coffee break!

Possible Misfire cause? Cracked!!

New Belt going on now

Gonna remove the head without the intake side attached. As far as I understand it is possible, but a little more tricky. Less removed = less potential lost items and problems in general.

Thinking of getting my valve cover and exhaust manifolds powder coated too. Silver valve cover and black exhaust manifolds. What do ya guys think :naughty:

Dieselman · 03-01-2009, 09:34 PM

I don't see how you're going to have the exhaust manifold powder coated, the plastic would melt and set fire.

The misfire could well be caused by the distributor backing disk, we had a member with just such an elusive misfire caused by it.

Keep plodding on and Have Fun..

ps2cho · 04-01-2009, 01:41 AM

Sorry I didn't mean powder coating...Forgot the name, but get it painted basically.

I hope that the distributor suppressor housing/backing disk WAS the cause of the misfire and the head gasket will leave me with a dead perfect, no-longer-leaking engine

Well...

Here she is!!

Here are each of the cylinders in order 1-6. How do they look?

Here is my coolant leak it looks like:

----------

Overall took me about 8hours including breaks. Didn't run into any major problems which was nice. A bit fiddly taking off the head without the intake manifold and items attached, but I think it was well worth it. Less hassle on putting everything back in.

Gonna take the head to a machine shop on Monday and get them to skim it and check everything over.

ps2cho · 04-01-2009, 01:54 AM

Where can I find the threaded Freeze plug that is for Cylinder #6??? All I find is the non-threaded one that goes on 1-5...but I need a new one for 6. Finally got it off and there is so much corrosion inside its completely blocked. That freeze plug was my coolant leak 100% sure.

grober · 04-01-2009, 10:35 AM

which of these do you mean? http://www.detali.ru/cat/oem_mb2.asp...SGR=065&SGN=07

There is a threaded plug to the oil gallery on the rear end of the cylinder head???

part no 000908010004 screw in plug

part no 007603010103 seal

its a M10X1 thread fastened to 15Nm

Could it be that your corroded freeze plug is plug that has already been replaced by a non standard item? Folks tend to forget that 15 year old + cars may have had extensive repair work done already and some components may not be MB and possibly of inferior or unsuitable materials??

Dieselman · 04-01-2009, 11:59 AM

Before having the head skimmed check whether it is actually warped at all, it probably isn't.
Was the coolant leak the reason for changing the head gasket..I hope not..but the gasket does look in good condition.

ps2cho · 04-01-2009, 05:01 PM

Quote:

Originally Posted by grober

which of these do you mean? http://www.detali.ru/cat/oem_mb2.asp...SGR=065&SGN=07

There is a threaded plug to the oil gallery on the rear end of the cylinder head???

part no 000908010004 screw in plug

part no 007603010103 seal

its a M10X1 thread fastened to 15Nm

Could it be that your corroded freeze plug is plug that has already been replaced by a non standard item? Folks tend to forget that 15 year old + cars may have had extensive repair work done already and some components may not be MB and possibly of inferior or unsuitable materials??

It is on the Cylinder Block under Cylinder #6 at the back.

Quote:

Originally Posted by Dieselman

Before haviong the head skimmed check whether it is actually warped at all, it probably isn't.
Was the coolant leak the reason for changing the head gasket..I hope not..but the gasket does look in good condition.

Well we were told by at least 2 different Indy's that the head gasket was leaking and there has been hissing between two cylinders when we did a leakdown test (cyl 1+2)...but after looking at the head gasket it looks reasonably good as you said. Maybe it is leaking...maybe its not. Either way the engine just doesn't sound happy, my MPG sucks, I've been told my car feels about 40HP less than it should be...so its sluggish and I'm losing coolant from the back and oil somewhere else that we need to investigate.

ps2cho · 04-01-2009, 05:11 PM

Here's a better picture of that plug I can't find:

Dieselman · 04-01-2009, 05:59 PM

Screw in core plug is A1179970230
Seal washer is A0069977548

Good luck, looks like you're doing Ok so far.

Check the head with a straight-edge before condemning it though.

grober · 04-01-2009, 06:40 PM

Quote:

Originally Posted by Dieselman

Screw in core plug is A1179970230
Seal washer is A0069977548

Good luck, looks like you're doing Ok so far.

Check the head with a straight-edge before condemning it though.

Ah cylinder block!

ITEMS 20+23 as Dieselman said http://www.detali.ru/cat/oem_mb2.asp...SGR=015&SGN=04

ps2cho · 04-01-2009, 10:38 PM

Quote:

Originally Posted by Dieselman

Screw in core plug is A1179970230
Seal washer is A0069977548

Good luck, looks like you're doing Ok so far.

Check the head with a straight-edge before condemning it though.

Well I want to have the Valve guides + Stem Seals done (Already bought them) and have it thoroughly checked over because this is my first head removal ever so I want to make sure everything is right. Only wanna do this once!! Pressure tested and all.

Quote:

Originally Posted by grober

Ah cylinder block!

ITEMS 20+23 as Dieselman said http://www.detali.ru/cat/oem_mb2.asp...SGR=015&SGN=04

Perfect. Thanks to the both of ya. With that part # how can I find somewhere that sells it? All that comes up in google is sites in Russian...

ps2cho · 04-01-2009, 10:44 PM

sorry double post

04-01-2009, 10:35 AM	#38
grober Hardcore MB Enthusiast Join Date: Jun 2003 Location: Perth SCOTLAND Car: E220 COUPE Posts: 8,968	which of these do you mean? http://www.detali.ru/cat/oem_mb2.asp...SGR=065&SGN=07 There is a threaded plug to the oil gallery on the rear end of the cylinder head??? part no 000908010004 screw in plug part no 007603010103 seal its a M10X1 thread fastened to 15Nm Could it be that your corroded freeze plug is plug that has already been replaced by a non standard item? Folks tend to forget that 15 year old + cars may have had extensive repair work done already and some components may not be MB and possibly of inferior or unsuitable materials?? __________________ Cheers Graeme E220 COUPE auto 96 Last of the Ol 124s Last edited by grober; 04-01-2009 at 10:54 AM.

04-01-2009, 11:59 AM	#39
Dieselman Hardcore MB Enthusiast Join Date: Jul 2003 Posts: 19,310	Before having the head skimmed check whether it is actually warped at all, it probably isn't. Was the coolant leak the reason for changing the head gasket..I hope not..but the gasket does look in good condition. Last edited by Dieselman; 04-01-2009 at 05:52 PM. Reason: typo

03-01-2009, 05:19 PM	#33
ps2cho Member Join Date: Oct 2008 Posts: 31	I'm starting my Head Gasket replacement today...finally! I'll let you guys know how it goes. Gonna try and take your advice about leaving the intake stuff on.

03-01-2009, 09:17 PM	#34
ps2cho Member Join Date: Oct 2008 Posts: 31	Mid way through. Coffee break! Possible Misfire cause? Cracked!! New Belt going on now Gonna remove the head without the intake side attached. As far as I understand it is possible, but a little more tricky. Less removed = less potential lost items and problems in general. Thinking of getting my valve cover and exhaust manifolds powder coated too. Silver valve cover and black exhaust manifolds. What do ya guys think :naughty:Mid way through. Coffee break! Possible Misfire cause? Cracked!! New Belt going on now Gonna remove the head without the intake side attached. As far as I understand it is possible, but a little more tricky. Less removed = less potential lost items and problems in general. Thinking of getting my valve cover and exhaust manifolds powder coated too. Silver valve cover and black exhaust manifolds. What do ya guys think :naughty:

03-01-2009, 09:34 PM	#35
Dieselman Hardcore MB Enthusiast Join Date: Jul 2003 Posts: 19,310	I don't see how you're going to have the exhaust manifold powder coated, the plastic would melt and set fire. The misfire could well be caused by the distributor backing disk, we had a member with just such an elusive misfire caused by it. Keep plodding on and Have Fun..

04-01-2009, 01:41 AM	#36
ps2cho Member Join Date: Oct 2008 Posts: 31	Sorry I didn't mean powder coating...Forgot the name, but get it painted basically. I hope that the distributor suppressor housing/backing disk WAS the cause of the misfire and the head gasket will leave me with a dead perfect, no-longer-leaking engine Well... Here she is!! Here are each of the cylinders in order 1-6. How do they look? Here is my coolant leak it looks like: ---------- Overall took me about 8hours including breaks. Didn't run into any major problems which was nice. A bit fiddly taking off the head without the intake manifold and items attached, but I think it was well worth it. Less hassle on putting everything back in. Gonna take the head to a machine shop on Monday and get them to skim it and check everything over.

04-01-2009, 01:54 AM	#37
ps2cho Member Join Date: Oct 2008 Posts: 31	Where can I find the threaded Freeze plug that is for Cylinder #6??? All I find is the non-threaded one that goes on 1-5...but I need a new one for 6. Finally got it off and there is so much corrosion inside its completely blocked. That freeze plug was my coolant leak 100% sure.

04-01-2009, 05:11 PM	#41
ps2cho Member Join Date: Oct 2008 Posts: 31	Here's a better picture of that plug I can't find:

04-01-2009, 05:59 PM	#42
Dieselman Hardcore MB Enthusiast Join Date: Jul 2003 Posts: 19,310	Screw in core plug is A1179970230 Seal washer is A0069977548 Good luck, looks like you're doing Ok so far. Check the head with a straight-edge before condemning it though.

04-01-2009, 10:44 PM	#45
ps2cho Member Join Date: Oct 2008 Posts: 31	sorry double post

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