I've read up on the boards here and found several posts saying the evaporators do not really go out that often...I've got a dash swap in the future and am wondering about the heater core...are they as tough or should I change it while I'm in there?

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-SpecialDelivery
1985 300CD Silver/Blue H&R Suspension (Sold, still cryin over that)
1982 300SD Silver/Blue '85 OM617 (Sold)
1982 300D - Blue/Blue (Sold)

at least clean it...

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1984 300SD Orient Red/ Palomino
1989 560SEC
2016 Mazda 6 6 speed manual
1995 Ford F-150 reg cab 4.9 5speed manual

I don`t think there is a tear down of the W126 heater/ac box. but as old as your SD is, it is probably full of debris stuck to the evaporater etc. pull it apart and cleaning will make it more efficient.

Also good time to replace the vac pods and any door seals.
It will will be a job.

I have a w123 type 1 from a 240 tore down to clean and replace the door seals. was quite a bit of debrix stuck to the evaporator.


Charlie

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there were three HP ratings on the OM616...

1) Not much power
2) Even less power
3) Not nearly enough power!! 240D w/auto

Anyone that thinks a 240D is slow drives too fast.

80 240D Naturally Exasperated, 4-Spd 388k DD 150mph spedo 3:58 Diff

We are advised to NOT judge ALL Muslims by the actions of a few lunatics, but we are encouraged to judge ALL gun owners by the actions of a few lunatics. Funny how that works

I've seen new heater cores caution that electrolysis from old antifreeze causes heater cores and similar parts to go bad. Since, I've been fanatical regarding coolant changes.

Destructions in with 1 new core said to measure coolant voltage (+ lead in coolant, ground other). Anything over .300 volts indicates the need to change coolant.

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85SD 240K & stopped counting painted, putting bac together. 84SD 180,000. sold to a neighbor and member here but I forget his handle. The 84 is much improved from when I had it. 85TD beginning to repair to DD status. Lots of stuff to do.

I think the sealing rings can go bad after many many years. The cores are steel (i think) and very rarely develop leaks.

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2013 Volkswagen Jetta Hybrid SEL Premium (Sparky)
http://badges.fuelly.com/images/smallsig-us/193500.png

It's a car not a science experiment! Open the throttle!

they're steel so they dont fail?.......ai

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-SpecialDelivery
1985 300CD Silver/Blue H&R Suspension (Sold, still cryin over that)
1982 300SD Silver/Blue '85 OM617 (Sold)
1982 300D - Blue/Blue (Sold)