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  #1  
Old 06-28-2002, 11:05 PM
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Join Date: Jul 2001
Location: Boca Raton Florida
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93 300e 2.8 antifreeze overflow question?

Hello
I have a 1993 300, I have searched the forums and possibly found a answer but i have some doubts

3 days ago i noticed my water temp climbing a bit higher than normal, i stopped a a station and saw my water level was low on the overflow tank so i topped off , temps never rose to danger levels so i figured i would just keep a eye on it , today i checked again before i left this morning and added some more water seeing it was low again , thinking i might need a water pump i was searching around the hush panel under the motor for any signs of water , looked damp but we have alot of rain lately here in florida, after driving about 35 minutes on the highway this afternoon watching the tempature gauge it never moved past normal, after parking i heard the gugling of water comming out of the overflow and exiting near the rf tire, and the top radiator hose was soft no pressure but still gurgling out the overflow.

no noticeable water in engine and trans oil , so im thinking water pump , but after reading through the posts im thinking radiator cap , after seeing no temp rise on gauge , its just bothering me that with water boiling in the overflow tank and the top hose soft no pressure , shouldnt the engine temp be hotter? and shouldnt the hose be hard with pressure , at least a little?

thank you for your answers in advance , and benzmatic , monday i will be ordering a new shock for the tensioner causei hear it rattlein and i can move it with my hand on the top bolt . looks like the bushing is gone , any tips on install?

john v
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1985 190 2.3
1993 300e 2.8
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  #2  
Old 06-28-2002, 11:33 PM
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Join Date: Apr 2001
Location: Baton Rouge
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I would make sure my radiator cap is good. I have seen thermostates cause some problems that you describe.If it was the water pump you should see some coolant running down the side of the oil pan by the drain plug from above. I would drop a thermostate in it put a new cap on it and make sure you get all the air out by turning on the heater.
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2000 Dodge Durango
98 Mazda truck
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  #3  
Old 06-29-2002, 12:59 AM
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if you've been running for some time on the highway and then you park, the temps will tend to go up for a bit because the coolant is no longer circulating and the fan is not drawing off the heat anymore. it sounds like the radiator cap is releasing at that point so you may want to replace it first before proceeding any further. BTW what temps are you seeing on your gauge? in this warm weather, mine stays at 90 - 95C range. in stop and go traffic or slowing down after sustained highway speeds, your temps will go up to around 105C which then triggers the aux fans and that should cool it down quickly enough...
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1993 300e-2.8
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  #4  
Old 06-29-2002, 04:17 PM
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Location: Boca Raton Florida
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ugggg

Well the bad news hit today,went out this morning to grab a new cap 4 buck investment , put it on , no luck still had no pressure in the upper hose , so took the panel under the motor off and saw the dreaded drip comming down from the ac compresser of anti freeze , bad water pump , stopped by ole klaus he says monday he will give me a price but looking at 500 minumum , oh well , im a pretty good diy'er but it looks to me like a nightmare job , so might have to leave it up to the pros

thank you for the replys , jsmith im here in florida where the temps run pretty high my needle usually sits between 80 and the next mark up 90 or 100c ? i know if theres a problem if i rise above that next mark for any significant amount of time , also i like the rear badgeing on your pic i have done the same with mine , only problem is that i still have the orig wheels and not the 5 holers so any true benz enthusiast can see the fraud for sure LOL

well all please comment on what you think a fair price for the job is and if im in the ball park
thanks
j
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1993 300e 2.8
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  #5  
Old 06-29-2002, 08:33 PM
engatwork's Avatar
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Join Date: May 2000
Location: Soperton, Ga. USA
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SRI - I would suggest trying to tackle the job yourself if you are a pretty good diyer. You have something else to drive while it is down? That, in my opinion is the key if you are a diyer because then you can take your time with it.
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  #6  
Old 06-29-2002, 08:33 PM
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Join Date: Apr 2001
Location: Baton Rouge
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Water pump pretty simple on this car , you get fan and shroud off ,take belt tensioner shock out of way and bolts for water pump ,bypass hose slide to the side.Alittle careful movement of pump and its off.Shouldnt take more than couple hours for good DIYer. Dont make mistake of removing power steering pump like most do.
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  #7  
Old 06-30-2002, 03:59 PM
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Location: Boca Raton Florida
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thank you for the replys

I have taken a better look at it and have a few questions , i see easy access to 3 of the 4 allens that hold the assy, on the 4th i am curious on how to get the access , is removing the shock tensioner as euro said? also the metal pipe the extends across the front of the engine , does that pull out of does it come out with the pump , the pump seems to have room to lift straight up and out after the belt and hoses and sensor connector removal .without even removing the pully. am i correct in this?

gonna give fastlane a call on monday to order the shock tensioner which i know i need anyway cause at idle in drive i hear it rattle away then when i put some pressure on it with a wooden dowel it goes right away i would like to see if they have a cd or book version of the shop manual for this car ,

thanks for any info you can give me on this replacement , i am seeing now that this looks much easier then the water pump i did on my ex's 1986 300e a few years back it looks like a completely different unit and that job was a tuff one.

re: have fully searched and read benzmacs posts about the tool i need , since i have no distribitor in this car as the older ones do maybe that is why i am thinking the configuration is different than the 86 i did a few years ago

thanks
jv
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Last edited by SRI inc; 06-30-2002 at 05:26 PM.
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  #8  
Old 06-30-2002, 06:31 PM
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If you're going to change out the water pump, I'd obtain the proper repair manual first. For Euro 287 it's easy. He does it for a living. If you've never done one before, it will help to know exactly what all is involved and where things are.
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