Is it possible to still replace the heater block even with the engine inside the bay. Or is it much easier with it out?

Heater Block ? ----not sure what that is....
or Block Heater ?-----for winter starting
or Heater Core ?----for warming the inside of the car ?

I'm sorry, but I haven't the foggiest idea what you are asking? Are you referring to the heating system "heater core" or are you referring to the engine block heater?

you people need to use a little common sense....

I ment the Block Heater for winter starting....

[QUOTE=BenzBoy8]you people need to use a little common sense....

I ment the Block Heater for winter starting....[/QUOTE


Well, than why didn't you say block heater? Hay, I'm tired too, been a long day!

I would highly doubt that you would have to remove the engine to remove the block heater, but you may need shorter arms getting up in there!

thank you for all the help. Sorry about the comments

BenzBoy8, I don't know why you were thanking those that replied. I didn't find most of their replies all that helpful either. I understood right away in your first post what you were talking about. Maybe thats because every vehicle around where I live has one and people have different names for them.

Anyyway, I have a '79 300 D and the block heater is leaking coolant (slowly). The fastlane picture (of my 300D and your SD) shows a threaded plug with a threaded insert heater element. I am wondering if you can get a large socket over this outer plug and get a ratchet and extension bar on it from unerneath. After 25 years of the heater element being in there in my case, I would expect some effort would be required. The fastlane one looks like it's made of brass, so maybe it could be easy to get out.

I can see the problem from above (with a mirror) because some time ago, I tossed out the non-operating air conditioner that would have been in the way.

Please post what you ended up doing. There isn't much stuff here on this topic. I am intersted in how it went.