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  #1  
Old 12-30-2010, 05:20 PM
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Rear main seal

Replacing the rear main seal on my 1984 190D, the motor is out of the car and completely torn apart sitting on my work bench in my garage. I got the new seal in the end cover, the question is can I use ultra blue RTV silicone gasket maker to seal the end cover to the block? The FSM says to use Loctite 573 or can I use something else?

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  #2  
Old 12-30-2010, 06:52 PM
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No. it's an air tight space, and silicone will just blow out when oil pressure builds. you need to use the anaerobic loctite 573. it's really the best product for the job.
http://www.sjgogo.com/pdf/573-en.pdf
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #3  
Old 12-30-2010, 07:04 PM
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Quote:
Originally Posted by vstech View Post
No. it's an air tight space, and silicone will just blow out when oil pressure builds. you need to use the anaerobic loctite 573. it's really the best product for the job.
http://www.sjgogo.com/pdf/573-en.pdf

Ok. Where is a good place to get that? Would Autozone or Orylies have that? Also, can I use the loctite 573 when I put my timing cover on?

Last edited by 04 Diesel; 12-30-2010 at 07:14 PM.
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Old 12-30-2010, 07:13 PM
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I had to order my tube from the snapon truck. it's possible you can order it at advance or NAPA might have it... not sure.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #5  
Old 12-30-2010, 10:42 PM
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Can I use the same loctite for the front timing cover and the freeze plugs?
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  #6  
Old 12-30-2010, 11:21 PM
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what do the assembly instructions say for the plugs?
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #7  
Old 12-30-2010, 11:44 PM
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Quote:
Originally Posted by vstech View Post
what do the assembly instructions say for the plugs?
FSM says loctite 241.
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  #8  
Old 12-31-2010, 12:36 AM
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Front Timing Cover

"Close Fitting" No RTV (It would never never cure)
Use Anerobic 574 loctite (Sets up and bonds in the absence of Oxygen.)
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  #9  
Old 12-31-2010, 09:54 AM
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Quote:
Originally Posted by 04 Diesel View Post
FSM says loctite 241.
then no, I'd not use 573, I'd use the correct blue threadlocker. that IS available at any auto parts store.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #10  
Old 12-31-2010, 10:54 AM
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Nobody has loctite around here, I went to Napa and they gave me Permatex Anaerobic gasket maker. He said that it is the same as the loctite. What do you think?
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  #11  
Old 12-31-2010, 11:38 AM
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the P agm should be the same as 573, not the 241, 241 is going to be listed as permatex medium strength duty threadlocker.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #12  
Old 12-31-2010, 11:54 AM
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So, what I have will work for the 573?
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  #13  
Old 12-31-2010, 01:44 PM
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it should. the spec sheets for both products seem to indicate similar designs.
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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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  #14  
Old 12-31-2010, 01:46 PM
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Loctite 574 is an anerobic flange sealant. I use it on all machined surfaces without a gasket. Any Porsche/Ferrari dealer will carry it and you can get it on E-Bay too. Wurth makes their own version of it too. I would wait and get the right sealant.

It will also stop the 'bleeding' from the fuel filter sealing washer on the 617....
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Did you just pass my 740 at 200 kmh in a 300SD?????

1978 300SD 'Phil' - 1,315,853 Miles And Counting - 1, 317,885 as of 12/27/2012 - 1,333,000 as of 05/10/2013, 1,337,850 as of July 15, 2013, 1,339,000 as of August 13, 2013



100,000 miles since June 2005 Overhaul - Sold January 25th, 2014 After 1,344,246 Miles & 20 Years of Ownership
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  #15  
Old 12-31-2010, 02:01 PM
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what's the difference between 573 (what the fsm is asking for in the original post) and 574 both state they are for anaerobic metal joining sealant

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John HAUL AWAY, OR CRUSHED CARS!!! HELP ME keep the cars out of the crusher! A/C Thread
"as I ride with my a/c on... I have fond memories of sweaty oily saturdays and spewing R12 into the air. THANKS for all you do!

My drivers:
1987 190D 2.5Turbo
1987 190D 2.5Turbo
1987 190D 2.5-5SPEED!!!

1987 300TD
1987 300TD
1994GMC 2500 6.5Turbo truck... I had to put the ladder somewhere!
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