1991 E300 coolant leak
10-12-2009, 02:29 AM
#1
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1991 300e 4matic
1991 E300 coolant leak
Hello,
First time post and looking for some advice regarding a coolant leak. It is a slow leak that drips from the passenger side of the engine block around the middle of the block. When the engine is running the leak is faster but not too fast. When the engine warms up the leaking coolant sizzles and evaporates. I can see coolant run down to one of the freeze plugs, run down along the edge of the freeze plug, then down to the bottom of the block, and ultimately drip very slowly on to my garage floor. My commute is short, 10 miles round trip, and after few days I check the coolant level and have to refill but not very much. My vehicle has 150K miles and I recently changed the radiator.
Any ideas?
Thanks.
First time post and looking for some advice regarding a coolant leak. It is a slow leak that drips from the passenger side of the engine block around the middle of the block. When the engine is running the leak is faster but not too fast. When the engine warms up the leaking coolant sizzles and evaporates. I can see coolant run down to one of the freeze plugs, run down along the edge of the freeze plug, then down to the bottom of the block, and ultimately drip very slowly on to my garage floor. My commute is short, 10 miles round trip, and after few days I check the coolant level and have to refill but not very much. My vehicle has 150K miles and I recently changed the radiator.
Any ideas?
Thanks.
10-12-2009, 07:24 PM
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1991, 300te 4matic
Hello,
First time post and looking for some advice regarding a coolant leak. It is a slow leak that drips from the passenger side of the engine block around the middle of the block. When the engine is running the leak is faster but not too fast. When the engine warms up the leaking coolant sizzles and evaporates. I can see coolant run down to one of the freeze plugs, run down along the edge of the freeze plug, then down to the bottom of the block, and ultimately drip very slowly on to my garage floor. My commute is short, 10 miles round trip, and after few days I check the coolant level and have to refill but not very much. My vehicle has 150K miles and I recently changed the radiator.
Any ideas?
Thanks.
First time post and looking for some advice regarding a coolant leak. It is a slow leak that drips from the passenger side of the engine block around the middle of the block. When the engine is running the leak is faster but not too fast. When the engine warms up the leaking coolant sizzles and evaporates. I can see coolant run down to one of the freeze plugs, run down along the edge of the freeze plug, then down to the bottom of the block, and ultimately drip very slowly on to my garage floor. My commute is short, 10 miles round trip, and after few days I check the coolant level and have to refill but not very much. My vehicle has 150K miles and I recently changed the radiator.
Any ideas?
Thanks.
10-12-2009, 09:38 PM
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1991, 300te 4matic
Isn't the water pump at the front of the engine? I think the water pump connects on the drivers side.
Last edited by silversleeves; 10-12-2009 at 09:41 PM.
10-12-2009, 09:48 PM
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1991 300ce
It looks like it could be the headgasket . That will cost over 1000 bucks to fix , my 300ce is still at shop having the heads rebuilt and gaskets replaced $$$.
Good luck !
Good luck !
10-12-2009, 10:02 PM
#6
Before concluding its the head gasket, make sure the oil gallery plugs have not corroded as they are located in the middle of the block on the passenger side.
EDIT: Nevermind freeze plugs are same thing. Missed it. So yes probably head gasket especially at 150k miles if it has never had a rebuild.
EDIT: Nevermind freeze plugs are same thing. Missed it. So yes probably head gasket especially at 150k miles if it has never had a rebuild.
10-12-2009, 11:17 PM
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1991 300e 4matic
Thanks for the responses. I was wondering about the head gasket vs. water pump but the water pump looks to be more oriented towards the drivers side. This is my first Mercedes so I'm learning.
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10-13-2009, 02:26 AM
#8
If the water pump is leaking, you should see coolant stains on the metal. It should be obvious.
You can also put some UV Dye in the system to 100% find out where its coming from. You can find it at any local auto store.
You can also put some UV Dye in the system to 100% find out where its coming from. You can find it at any local auto store.
10-13-2009, 03:45 PM
#10
Just stick with Victor-Reinz. I recommend getting the complete set /w intake + exhaust gaskets. Autohausarizona carrys it for about $60 IIRC.
I'm 10k miles into my new gasket and no problems
Everything fit perfect and I am happy with it.
I'm 10k miles into my new gasket and no problems
Everything fit perfect and I am happy with it.
