Afternoon,

I'm going to try & replace my oil pan gasket in a few days. Since I've been looking into this I keep noticing oil pan bolt sizes M6 & M8. Anyone know what this means? I can't find any oil pan bolts any where, even Phil does not carry them. It takes about 30 & I sure don't don't to get them from the Mercedes dealer - I purchased some valve cover bolts from there & it was over $10. What other bolts might work on this? Thanks.

Hugh Sr
1984 190D (W201) 2.2L

First,Why are you looking for NEW oil pan bolts?
[They SHOULD last the life of the engine,if not BOOGERED or OverTorqued]

(The most important part of R+R ing the Oil Pan is CLEANLINESS BEFORE
you touch the first tool!)
(The Second most important thing is NOT TO OVERTORQUE THE BOLTS!)


Are METRIC Bolt (Diameter ) sizes.

"Stand By One" (Busy with EPC)

O.K.

Looks like you've got at least 4 different kinds of oil pan bolts.

Have you got the FREE Mercedes Electronic Parts Catalog?

Register here:
http://epc.startekinfo.com/epc/subscribe.jsp

They will ask for a US based credit card number to prove that you're one of
their customers ,BUT they will not use the number.

Once you've registered...enter your VIN number and press ENTER on your
keyboard...Then go to OIL PAN and it'll list all the different part numbers.

You have PM traffic

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'84 300SD sold
124.128

^Yes, the bolts will have a dimension such as 8x125x13, the 125 being the thread pitch, the 13 being the length.

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83 SD

84 CD

I'm going to use a torque wrench, but one could break & then where would I be. I'm still wondering what M6 & M8 means? Thanks.

Hugh Sr
1984 190d (W201)

I don't have any info on that engine. A 15 second search found this
http://euler9.tripod.com/bolt-database/22.html

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83 SD

84 CD

M6 is a Metric bolt with a nominal diameter of 6mm.

M8 is a Metric bolt with a nominal diameter of 8mm.

And if you're gonna use a Torque Wrench on those bolts...Make sure it's Very,
Very accurate! Those bolts do not require much Torque at all.

Tighten the bolts in an X pattern in two or three Ascending stages of Torque.
(In other words, If the total Torque is 8 Ft. Lbs ...do it in stages I.E.
2 Ft Lbs...Then 6 ft lbs...Then 8ft lbs.)

If you break one of those bolts ...You're Gonna Cry !

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'84 300SD sold
124.128

You will only cry because you probably will have to take the pan off to remove the broken bolt,not because the bolts are hard to get! Most all the hardware stores in our area carry a pretty good stock of metric bolts in the common sizes like M6 or M8. Replaceing the bolts with new ones really should not be needed,however if you replace any make sure the new bolts are at the least as strong as the original,the bolts will have numbers on the head of the bolt like 8.8 or 10.x the higher the number the stronger the bolt, ok to use stronger than original not ok to use weaker ones.To get the accuracy you should have for M6 bolts you probably should have an inch/pound torque wrench. Don

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Red Green "This is only temporary,Unless it works!"

97 E300D 157000 miles
87 300TD ?141k? miles