1997 E320 head gasket leaking - PeachParts Mercedes-Benz Forum

dagwoodp · #1 03-05-2007, 12:50 PM

I just changed the tranny fliud and filter in my 97 e320, while I was under the crate turning the torque converter around to be drained, I noticed oil coming from around the head gasket. Can anyone shed some light on this, can the head bolts be retorqued, if so what is the torque specs and sequence? Or does the head gasket need replaced, can someone show me how to do it? Greasy garage in Ohio

softconsult · #2 03-05-2007, 01:33 PM

If it's not coming from the valve cover gasket, then it is the head gasket. No you can't re-torque.

Yes, you will have to replace headgasket. It's obviously do able, but not a simple as many cars. Variable valve timing, etc.

Here's a link http://www.continentalimports.com/ser_ic100345.html

Steve

dagwoodp · #3 03-05-2007, 02:05 PM

Thanks softconsult, any suggestions on where to but the gasket set?

300B · #4 03-05-2007, 03:47 PM

Quote:

Originally Posted by softconsult

If it's not coming from the valve cover gasket, then it is the head gasket. No you can't re-torque.

Yes, you will have to replace headgasket. It's obviously do able, but not a simple as many cars. Variable valve timing, etc.

Here's a link http://www.continentalimports.com/ser_ic100345.html

Steve

Wouldn't a 97 have a M112 engines instead of the I6?

suginami · #5 03-05-2007, 03:53 PM

Quote:

Originally Posted by 300B

Wouldn't a 97 have a M112 engines instead of the I6?

No, 1996 and 1997 E320's have the inline-6 M104 engine.

david s poole · #6 03-05-2007, 04:40 PM

do the valve cover gasket set before you condemn the head gasket.

G-Benz · #7 03-05-2007, 09:50 PM

Quote:

Originally Posted by dagwoodp

...can the head bolts be retorqued, if so what is the torque specs and sequence

As an FYI, the head bolts are designed to stretch (elongate) upon torquing via specifications. Therefore, re-torquing serves to only stretch the bolts further, which does nothing to fuse the head and block any tighter.

Because of the stretching properties, you should NEVER re-use the head bolts. You will need a new set if you plan to tackle this job.

brewtoo · #8 03-05-2007, 10:58 PM

Quote:

Originally Posted by G-Benz

Because of the stretching properties, you should NEVER re-use the head bolts. You will need a new set if you plan to tackle this job.

If the bolts are within spec, it is perfectly acceptable to reuse them. Just measure their length to verify.

brewtoo · #9 03-05-2007, 11:01 PM

Quote:

Originally Posted by dagwoodp

Thanks softconsult, any suggestions on where to but the gasket set?

Buy the gasket set right here:

Click here for head gasket set

samiam4 · #10 03-06-2007, 08:26 AM

Very common on M104 engines,

On a good note, the valve guides/seats hold up very well. Just R&R the gasket and do valve seals while the heads are off(easy).

it should only need a headgasket-nothing else unlike M103's.

Michael

dagwoodp · #11 03-06-2007, 02:12 PM

where can I but the head bolts and valve guides

brewtoo · #12 03-06-2007, 04:40 PM

Just click the Buy Parts button at the top of this page.

dagwoodp · #13 03-07-2007, 08:21 AM

Thanks Sam, I am ordering the parts today and as soon as it gets warm up here, I'll get started.

loubapache · #14 03-07-2007, 08:58 AM

Make sure it is the head gasket, not just the front timing cover. Look for the front of the engine on the passenger side. If the leak starts there, very good chance it is the timing cover. It will be an external leak (a couple drops per night) and it should not affect the performance or longevity.