Rapid coolant loss, help
Thread Starter
Junior Member
Joined: Feb 2014
Posts: 20
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1987 Benz W124 300TE Euro, 1988 BMW 735i E32 "Chornei Bumer"
Rapid coolant loss, help
Hey guys recently my M103 has been going through WAAAYYY too much coolant lately and heating up very quickly, not quite to the red but between 90 and 120. I'm not sure where the leak could be coming from as the reservoir doesn't appear to be cracked and all the hoses I can get to without a hoist seem to be in good shape. Nor do I believe it's the head gasket as the PO replaced it prior to me buying it (the guy traded a MKII Golf to his mechanic to do the job). My thoughts are it may be the water pump? But again I'm not going to get a chance to put it on a hoist until Sunday. There's been drips under the middle of the engine and when I park it lets out whatever's left. Have any of you had issues like this and what's the best way of diagnosing the problem. If it helps it's a euro 4-matic. The radiator also seems to be in good shape as well. But I mean I could pour a whole jug of coolant in and the light is still on saying I'm low... Plus just today my heater stopped blowing hot. Thermostat problem maybe?
On the upside I did find out factory Mercedes coolant is like $15 cheaper than the factory stuff for my old E32 7-Series
Hope to hear from you gents soon
Mike.
On the upside I did find out factory Mercedes coolant is like $15 cheaper than the factory stuff for my old E32 7-Series
Hope to hear from you gents soon
Mike.
Last edited by Zag7er; Apr 12, 2014 at 07:04 AM.
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Joined: Oct 2013
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From: OR
1990 300e, 1985 635csi
It could also be leaking from the water pump bearing, the weep hole, or from between the block/water pump. All three of the above would call for a new pump (p.I.t.a)
The heater probably isn't hot anymore because there is air in the heater core, which you will have to bleed out.
The heater probably isn't hot anymore because there is air in the heater core, which you will have to bleed out.
Thread Starter
Junior Member
Joined: Feb 2014
Posts: 20
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1987 Benz W124 300TE Euro, 1988 BMW 735i E32 "Chornei Bumer"
Thanks for the help guys. I'm more inclined to believe its the water pump since there's no other symptoms of it being a head gasket issue.
Is there a DIY Link for the waterpump replacement on here anywhere?
Btw I looked up photos of that pump.... Does look like its gonna be a PITA
Is there a DIY Link for the waterpump replacement on here anywhere?
Btw I looked up photos of that pump.... Does look like its gonna be a PITA
Junior Member
Joined: Oct 2013
Posts: 63
Likes: 0
From: OR
1990 300e, 1985 635csi
Sure man, http://www.peachparts.com/Wikka/M103WaterPump there's your link.
Make sure you get the small hose from the pump to the head. Its cheap and saves yourself so much trouble if you just do it while you're already there. Also extensions and elbows. Do yourself a favor and buy a set, I used every size extension available to me during this job.
Make sure you get the small hose from the pump to the head. Its cheap and saves yourself so much trouble if you just do it while you're already there. Also extensions and elbows. Do yourself a favor and buy a set, I used every size extension available to me during this job.
