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  #1  
Old 07-08-2013, 02:46 PM
5cylinder's Avatar
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1985 300CD-T (Calif.): Removing original block heater element

My vehicle is a 1985 300CD-T (California).

Issue:
I am seeking to remove and replace the original block heater element.

Question:
What, if any, issues/trouble are/is there with reaching the block heater element given the infamous trap oxidizer on this vehicle?

I intend to soak the old element with PB Blaster off and on for a couple of days prior to undertaking the job in an effort to perhaps ease removal.

Thanks for any advice or comments about this work.

Last edited by 5cylinder; 07-09-2013 at 12:21 AM.
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  #2  
Old 07-08-2013, 03:08 PM
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It's not worth it. Install a lower radiator hose heater. A number of old threads on here about how difficult it is to remove the OE heater.
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Old 07-08-2013, 03:54 PM
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The only proper way to remove the old heater involves heating the plug with a torch before cranking on it. I used a 6' extension and a torch to remove mine.

Wasn't there a recall on the trap ox devices?
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Old 07-08-2013, 04:00 PM
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Quote:
Originally Posted by Simpler=Better View Post
The only proper way to remove the old heater involves heating the plug with a torch before cranking on it. I used a 6' extension and a torch to remove mine.

Wasn't there a recall on the trap ox devices?
Ah!

How quickly I forgot!
Of course: The torch. My old standby. Used it successfully on the differential plug a couple of years ago...

Thanks!

Last edited by 5cylinder; 07-08-2013 at 07:56 PM.
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  #5  
Old 07-08-2013, 07:41 PM
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The necessity of 6' of leverage in order to unscrew the heater element speaks volumes about the job.
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1977 300d 70k--sold 08
1985 300TD 185k+
1984 307d 126k--sold 8/03
1985 409d 65k--sold 06
1984 300SD 315k--daughter's car
1979 300SD 122k--sold 2/11
1999 Fuso FG Expedition Camper
1993 GMC Sierra 6.5 TD 4x4
1982 Bluebird Wanderlodge CAT 3208--Sold 2/13
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  #6  
Old 07-08-2013, 07:47 PM
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Quote:
Originally Posted by kerry View Post
The necessity of 6' of leverage in order to unscrew the heater element speaks volumes about the job.
I regret that I never had a picture taken of me standing above the block on my friend's 1983 300CD-T, using a piece of pipe on a breaker bar with a huge hex wrench on the end to remove the heater plug in the block. Would've been a great shot! Still got that old plug laying around somewhere...sat in the block for 20+ years before coming out.
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Old 07-08-2013, 08:08 PM
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The plumbing for the trap catalyst so impedes access that it makes sense to ignore it and instead use a lower radiator hose heater. That's what I did when I had a 1985 300D-T.

Jeremy
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