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 12-19-2002, 06:54 AM
Registered User
Join Date: Jun 2002
Location: Chicago Area
Posts: 97
Question Coolant Flow Passages in E320

I believe that I have debris in the coolant system as a result of a head gasget repair done last summer. Poor heat in winter, washer tank fluid only warm, higher than normal temps in the summer. I believe that the source of this contamination was bits of old head-gasket which fell down into the block during the repair.

So here is the question. Among the rad, heater core, oil cooler, block and head passages & washer heat exchanger, where is the smallest coolant passages that are most likely to collect the debris? My plan is to do a through back-flush of the system over the XMAS holiday, and this will help me target the backflush strategy.

I can state that it is not the rad passages, because I have already had the rad out of the car and did a flush on the bench and got zip.
Tom Latos
2002 E320
1995 E320 Sold at 288kmiles
Reply With Quote
Old 12-19-2002, 05:59 PM
Senior Member
Join Date: Sep 2002
Posts: 2,483
Hi Tom, I doubt a cooling system restriction is causing your problem. You'd have to drop a lot of stuff in there to block a passage. It sounds like your thermostat is stuck open, not allowing the engine to reach operating temp. A quick way to check is to block the air intake on the grille. Watch the temp closely and see if the heat output increases. As far as higher temps in the summer, if the coolant doesn't spend enough time in the radiator it can't get rid of the heat. Flushing the cooling system is a good idea regardless, but I've never seen a blockage in anything but a radiator that caused a problem. I have however, seen dozens of thermostats stick open and cause exactly the problem you've described. Good luck
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 09:30 AM.

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