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W201 Moderator
89 190E2.6- 5-speed Manual, 95 E320 Sportsline-sold, 2001 E320 4matic Wagon-sold
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There are two types of bolts. The ones with washers and the ones without.
The ones I got for my '89 from the dealer do not use washers. I saw on a '90 that has washers.
 

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91 500SL 37k,90 300SE sold, 91 300E sold , 92 300E137k ,02 Kia Sedona ,I know..... its a Mini van.
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Discussion Starter #22
Last time around for this car it had washers.
 

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W124
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5,300 Posts
Make sure to oil the underside of the bolt head if you use the washerless headbolt when you do your torque sequence.
 

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1999 E320, 2000 E320, 2003 E320 Wagon, 2005 C230K SS, 2010 Accord LX w Eibach & Koni FSD's
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Still needing a good torque wrench , I want the longer handle one that clicks, good ones are to expensive for me at this time, I think Autozone has a tool loan service ,will see if they have one or neighbor Rick, he's a mechanic for the Edison Company.
How about a Harbor Freight Icon one? Price is very reasonable with a 20% off coupon.

Reviews/tests has been good on them.

I like mine, but haven't used it yet on anything where correct torque is critical.
 

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91 500SL 37k,90 300SE sold, 91 300E sold , 92 300E137k ,02 Kia Sedona ,I know..... its a Mini van.
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8,176 Posts
Discussion Starter #25
I'll check it out, the one I have and used last time is 1/2 18" long and man I had a hard time getting it to spec, if I remember right 55nm, I felt like something was going to snap lol, I need something longer for leverage.
I've been reading about dial indicators, would be nice but not really necessary.
With this nasty virus were going thru I have to watch my pennies, our renters can't pay us and that what we live on!
 

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87 300D 5 speed
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OK thanks, just checking.
$110 for head bolts! OMG last time it was $37 for 14, price now is almost $8 each.:cautious:
MB headbolts are designed to be reused so long as they are within spec. Replacing them as long as they are still within spec won't make your HG any more reliable.


The m103 is notorious for killing headgaskets starting with the teltail oil leak at cyl 6 when the engine is routinely run hot, especially over 100c. Keeping it under 100c at all times will greatly extend HG life expectancy.
 

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W124
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I'll check it out, the one I have and used last time is 1/2 18" long and man I had a hard time getting it to spec, if I remember right 55nm, I felt like something was going to snap lol, I need something longer for leverage.
I've been reading about dial indicators, would be nice but not really necessary.
With this nasty virus were going thru I have to watch my pennies, our renters can't pay us and that what we live on!
Getting it to the nm spec shouldn't be hard. The 90 degree torque angle is where you start sweating bullets that something is going to snap. Use a breaker bar for that, not a torque wrench.
 

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91 500SL 37k,90 300SE sold, 91 300E sold , 92 300E137k ,02 Kia Sedona ,I know..... its a Mini van.
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8,176 Posts
Discussion Starter #28
Where do I buy a Tommy Handle?o_O
 

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91 500SL 37k,90 300SE sold, 91 300E sold , 92 300E137k ,02 Kia Sedona ,I know..... its a Mini van.
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8,176 Posts
Discussion Starter #29
So last time I torqued to 55nm, then I see on Peach Parts 70nm? I think if their all torqued to same value should be OK.
Interesting you can measure bolt for spec , think I'll get new ones, anyone ever snap a head bolt?:rolleyes:
Hard to believe last time I did this job to the 300E was 9 years ago.
I have some work to do on my van this week, then will start.
2643924
 

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W124
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Hope it all goes well. I've done this three times on M103s. Two cars; twice on one of them. Both had heads refurbed at the time including skimming. First one got new head bolts when they were $3.00 a piece. Second car I reused the originals because they met spec. First one ended up leaking at number 6 and so I redid the HG on that one.
 

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91 500SL 37k,90 300SE sold, 91 300E sold , 92 300E137k ,02 Kia Sedona ,I know..... its a Mini van.
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8,176 Posts
Discussion Starter #31
Wow three times! wanta do it four times?:giggle:
Hey while I'm at it that sensor next to the oil filter needs replacement whats it called?
 

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'92 300TE 4matic 280,000miles, '92 300TE 4Matic 'Ice Blue Metalic' 101,000miles
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How about a Harbor Freight Icon one? Price is very reasonable with a 20% off coupon.

Reviews/tests has been good on them.

I like mine, but haven't used it yet on anything where correct torque is critical.
I bought the 3/3" drive, inch/lb ICON torque wrench from HF....they mostly don't discount ICON stuff......sometimes. I paid $100 for it, so no 'deal'. Good quality though and they spec out against a Snap On......usually a little more accurate.

I could have bought a full size 1/2" drive, ft/lb ICON for about the same price. That makes absolutely no sense to me. I need a big torque wrench that goes to about 250 ft/lbs. There's a big ICON I'm watching.

I don't mind buying used tools, but if some buffoon has dropped his torque wrench on concrete then it's worthless. I have a lot more confidence in the old fluid filled ones....but I think most of them today are spring loaded. Springs fatigue and wear.....how long these wrenches will keep their torque specs is anyone's guess.

Kevin
 

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1999 E320, 2000 E320, 2003 E320 Wagon, 2005 C230K SS, 2010 Accord LX w Eibach & Koni FSD's
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I bought the 3/8" drive, inch/lb ICON torque wrench from HF....they mostly don't discount ICON stuff......sometimes. I paid $100 for it, so no 'deal'. Good quality though and they spec out against a Snap On......usually a little more accurate.
20% off Icon coupons has been available for the last several months. They are easier to find online. You can print it or have it on your phone.

I got the 3/8" 20-100 ft/lb one (only 16") for $80 + tax and it's very nice. It would be perfect if it went down to 10 ft/lb and was 18".

I also bought a couple of their ratchets............slowly upgrading my tool box :). I've been using a Proto that was my Dad's. The Icon is sweet! 90 teeth vs 24 for the Proto.

The Proto is over 60 years old and a beast! My brother and I use to put a 3' breaker bar on it to break rusted bolts loose on the farm.

 

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1990 300SL-24V, 1999 SLK230 Sport, 2014 Ford Escape 2.0 Titanium AWD
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58 Posts
Hi,
I have the 1990 M104 300SL-24V engine and had to do a head gasket at 96000 miles. What i learned will blow your mind.
I initially did buy the OEM Mercedes head gasket at the dealership. At that time they did not sell the upgraded copper re- enforced gasket. I educated myself and bought an aftermarket copper re-enforced version, so my oil leak at cylinder six would finally stop. I returned the OEM head gasket for a refund and repaired the HG iaw with a pelican parts/peach parts write-up that was very helpful. 9 years and 162.000 miles and still running strong. Hopefully, it will last for a little while longer. I used new head bolts, didn't need to mill the head and used the OEM torque specs working from inside out. I had a quality torque wrench though.
2644187
2644188


I learned that MB would't sell that knowing you will develop a leak again and probably will have to redo the head gasket job within 30000 miles. That was in 2011. I hope they changed their minds. If you are not using these re-enforced gaskets on your old engine you will have trouble again. I don't know if they are available for the M103, since they are slightly different from the M104, but let's think positive.

Greetings and good luck...i don't have the part number or maker (i believe it was either Victor Reinz or Ellring)

Wolfgang
 

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Premium Member
1990 Benz 300E 2.6 (mine) ; 1994 E320 Wagon (wife's) ; 1993 300CE Cabrio, needs some TLC
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7,279 Posts
re: torque wrenches, they are usually most accurate mid range. you want a 1/4" drive one for the small stuff, 3/8" for the middle, and 1/2" drive for the heavy stuff.
 

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W201 Moderator
89 190E2.6- 5-speed Manual, 95 E320 Sportsline-sold, 2001 E320 4matic Wagon-sold
Joined
·
3,173 Posts
Hi,
I have the 1990 M104 300SL-24V engine and had to do a head gasket at 96000 miles. What i learned will blow your mind.
I initially did buy the OEM Mercedes head gasket at the dealership. At that time they did not sell the upgraded copper re- enforced gasket. I educated myself and bought an aftermarket copper re-enforced version, so my oil leak at cylinder six would finally stop. I returned the OEM head gasket for a refund and repaired the HG iaw with a pelican parts/peach parts write-up that was very helpful. 9 years and 162.000 miles and still running strong. Hopefully, it will last for a little while longer. I used new head bolts, didn't need to mill the head and used the OEM torque specs working from inside out. I had a quality torque wrench though. View attachment 2644187 View attachment 2644188

I learned that MB would't sell that knowing you will develop a leak again and probably will have to redo the head gasket job within 30000 miles. That was in 2011. I hope they changed their minds. If you are not using these re-enforced gaskets on your old engine you will have trouble again. I don't know if they are available for the M103, since they are slightly different from the M104, but let's think positive.

Greetings and good luck...i don't have the part number or maker (i believe it was either Victor Reinz or Ellring)

Wolfgang
Well maybe they keep the good ones for themselves. My '95 leaked oil (under warranty) at 25K miles. The one replaced at the dealership in 1998 was bone dry 120K miles later in 2010 at 145K miles when I sold the W124.

Maybe it is more so with installation and the reinforced copper just helps matters.

My M103 original never leaked when I replaced it at 190K miles. And the replacement gasket I purchased from the dealer in 2018 never had the copper either.....
 

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Premium Member
'92 300TE 4matic 280,000miles, '92 300TE 4Matic 'Ice Blue Metalic' 101,000miles
Joined
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10,496 Posts
20% off Icon coupons has been available for the last several months. They are easier to find online. You can print it or have it on your phone.

I got the 3/8" 20-100 ft/lb one (only 16") for $80 + tax and it's very nice. It would be perfect if it went down to 10 ft/lb and was 18".

I also bought a couple of their ratchets............slowly upgrading my tool box :). I've been using a Proto that was my Dad's. The Icon is sweet! 90 teeth vs 24 for the Proto.

The Proto is over 60 years old and a beast! My brother and I use to put a 3' breaker bar on it to break rusted bolts loose on the farm.

I used Proto professionally for decades....especially at work. They were brutal, but crude tools. Kind of like the Spartan brand that NAPA used to carry....instead of the polished New Brittan. When I had my farm, all my biggest and toughest pullers were Proto when I split tractors apart etc. If you did manage to break something, it was replaced under warranty. No Snap on tool ever out muscled a Proto.

I'm undecided on the ICON. They work....can't really endorse them yet.

Kevin
 

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2002 E430 1994 E320
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24 Posts
I'm doing a head gasket as well on my 124 but it is an M104 car. The previous owner used a victor reinz head gasket which was crumbling in piece when removed. Upon further examination it also looked like the head bolts were reused as they were visibly stretched. My car would leak a lot of oil from the rear cylinder head. I'm also changing my timing chain. Car had 119k miles on that chain and when we removed it it was stretched by half a link. I have tons of pictures on my thread if anyone is interested in seeing.
 
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