Ben,
On non MB, I have found them to be pretty tough, so you can be pretty aggressive with a scraper or an old screwdriver. I don't know if it is still available, but there used to be scrappers that were made for this. They looked like about 5 or 6 heavy wires side by side, bent around into a shape that made a handle.
Try to be careful not to let the bits you scrape off to fall down inside the engine.
Most of the de-carbonizing you are doing will be on the pistons, but also check the top deck of the block to make sure it is really smooth so the head gasket will seal properly.
Bobby
With ya 200% Bobby. What is a good way to get the carbon off the pistons without creating more problems?
Thanks!
Ben near Detroit.
From: diesel_mercedes@yahoogroups.com [mailto:diesel_mercedes@yahoogroups.com] On Behalf Of Bobby Yates Emory
Sent: Sunday, January 09, 2011 12:58 AMSubject: Re: [diesel_mercedes] Head experts...your insight please
Ben,
No experience with MB heads, but:
I would remove the glow plug chambers and try to clean them. If they do not clean up, I would replace them.
I would replace all the glow pugs while it is easy.
I would clean all the carbon off the head and try to figure a way to test the valves (If you don't have a better way - turn the head so the ports are up, pour gasoline in each port, and see if the gas leaks out.)
I would clean all the carbon off the pistons, but be careful not to get the carbon bits into the engine.
Lots of work - good luck.
BobbyOn Sat, Jan 8, 2011 at 7:11 PM, bgiovan <bgiovan@cavtel.net> wrote:
Well got the head off the donor car today (recall needing to R&R the head on a 1979 W116 300SD). First time doing this so...
If the experts would care to gander at the photos and give me their feedback, I'd be ever so grateful!
http://picasaweb.google.com/116318077355015592300/300SDHeadTurboRedux#
Ben near Detroit
--
Toward freedom,
Bobby Yates Emory
--
Toward freedom,
Bobby Yates Emory
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