Parts Catalog Accessories Catalog How To Articles Tech Forums
Call Pelican Parts at 888-280-7799
Shopping Cart Cart | Project List | Order Status | Help

Go Back   PeachParts Mercedes ShopForum > Technical Information and Support > Tech Help

LinkBack Thread Tools Display Modes
Old 03-26-2003, 09:26 PM
Registered User
Join Date: Apr 2002
Location: Brookfield, CT
Posts: 20
Coolant flush

I'm planning to flush my cooling system (1994 sl500) and have a few questions:

1. Is there a drain plug for the block ...if so, where is it located?
2. Should I run the heater during the flush or should the heater
hoses be disconnected and flushed with a garden hose?
3. Which heater hose is the input to the heater core and are
there any special valves (i.e., mono) that need to be

I appreciate any help/advice you folks can give me. Thanks.
Reply With Quote
Old 03-27-2003, 06:47 PM
Registered User
Join Date: Sep 2002
Location: Kingsport, TN
Posts: 375
Hi rjpeters98,

I don't know your car but assume it's a V8. There should be a drain plug on each side. If I recall right, Larry Bible has described a flushing routine, but it might have been a different car. Do a search and you will get an idea.

If you do it with the car running, you would want the heater or defrost on, so the water will circulate through the heater element.
I did a flush with citric acid and had the stuff circulating through the engine for 15 minutes with heater on.

Somebody else can probably provide more details for your specific car.

Good luck

Reinhard Kreutzer
Reply With Quote
Old 03-27-2003, 08:49 PM
Registered User
Join Date: Apr 2002
Location: Brookfield, CT
Posts: 20

Thanks for your reply. I'll try to find those drain plugs tomorrow.
Hopefully they are not prone to leakage after being used!
Reply With Quote
Old 03-28-2003, 01:20 AM
Registered User
Join Date: Jun 2000
Location: Dubai, United Arab Emirates
Posts: 238
There are 2 kinds of drain plugs for the V8 engines. Mine have the type with a very soft aluminium washer that can damage easily when putting them back in. They are cheap and I think worth replacing every time.
1993 190E 2.0L (Euro.) sold
1991. 500 SEL (Euro.)
1991. 300 CE (Euro.) sold
1993. 500 E (U.S. spec.)
Reply With Quote


Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is On
Trackbacks are On
Pingbacks are On
Refbacks are On

All times are GMT -4. The time now is 07:29 PM.

Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2018, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2018 Pelican Parts LLC - Posts may be archived for display on the Peach Parts or Pelican Parts Website -    DMCA Registered Agent Contact Page