Mercedes engine coolant problems

[classicmerc]

Help !! I'm a new member and currently own a 1969 mercedes benz w114 230.6/8 and I am having trouble with the cooling of the engine . Not being able to get a replacement oil cooler for the car , a mechanic friend said it wasn't needed really and could be bypassed by a pipe . Since then the car drives lovely on long runs but starts to overheat on sitting still or in slow moving traffic . I've tried replacement oil cooler from W115 but is too big and won't fit .. Is an oil cooler really needed on this car ( south african import ) or is there another problem that gives the same effect .. Removed the oil cooler before putting car on road , so don't know difference .. sorry if it's a stupid question , but if anyone will know it's the owners of mercedes simuliar to mine !!

 

[roofless]

on older car's it can be the timing needing advanced slightly.try a timing check with a strobe light & check all the vacum pipe's ect

 

[classicmerc]

on older car's it can be the timing needing advanced slightly.try a timing check with a strobe light & check all the vacum pipe's ect

Many thanks for that , will get it booked in for this check in the week at a reputable garage , thanks again

 

[roofless]

Many thanks for that , will get it booked in for this check in the week at a reputable garage , thanks again

i would get some more view's first for thing's common on that model posabley

 

[Parrot of Doom]

Oil removes more heat from a car than the radiator. I'd say it certainly needs the oil cooler.

 

[Bigtee]

Why not fit another oil cooler not the standard type?

There is plenty on the market you will need pipe and fittings place in front of radiator or rig up a thermo switch and fan?

 

[television]

I would refit an after market cooler,, As roofless said worth strobe check as slightly to far retarded really affects these engines

 

[kth286]

You are suggesting that because you have no engine oil cooler that the car is overheating - yes ?

Never heard such rubbish for a road car.

What temperature is the coolant temperature running at when it gets hot?

You need to sort the main cooling system out first ie. thermostat stuck, engine fan not working, radiator partially blocked needing a flush, the correct ratio of coolant to water (50% normal) etc etc.

Let us know when those have been verified to be 100% correct, and how the behavour of car is.

Do you actually have an oil temperature gauge in you car? If so, do you know what temperature your oil should be?

 

[classicmerc]

You are suggesting that because you have no engine oil cooler that the car is overheating - yes ?

Never heard such rubbish for a road car.

What temperature is the coolant temperature running at when it gets hot?

You need to sort the main cooling system out first ie. thermostat stuck, engine fan not working, radiator partially blocked needing a flush, the correct ratio of coolant to water (50% normal) etc etc.

Let us know when those have been verified to be 100% correct, and how the behavour of car is.

Do you actually have an oil temperature gauge in you car? If so, do you know what temperature your oil should be?

Thanks everyone for your replies , they are all good suggestions and will be looked into .. as a response to kth286 , thermostat is new ( MB part ) engine fan works fine and the radiator was reconditioned by last owner ( with receipt / MB supplied ) so these things have all ready been explored , but thank you for your comments .
The car displays an adverse reaction to sitting still for to long and the temp gauge builds quite quickly , oil pressure sits at 45 on long journeys and doesn't seem to drop even when hot . I am not suggesting for one second that the oil cooler is the main problem with the car overheating and my main query was to possibly ask for help in trying to find out what could cause the problems I am experiencing

 

[television]

The reason roofless and I said check the timing is that being slightly retarded on this engine does make it get too hot, this can be checked with a strobe in 5 mins flat

 

[kth286]

So, is it a viscous coupled fan and does it actually cut in when the engine gets very hot?

 

[classicmerc]

So, is it a viscous coupled fan and does it actually cut in when the engine gets very hot?

Thank you again for your reply and just to add it is NOT a viscous coupled fan and the fan is running all the time whilst the engine is running ..

 

[television]

So, is it a viscous coupled fan and does it actually cut in when the engine gets very hot?

Its not David,it a conventional fan belt set up

http://www.detali.ru/cat/oem_mb2.as...+++765.700&CT=M&cat=033&SID=20&SGR=001&SGN=01


I wonder if there were any problems with the water pump impellers

 

[classicmerc]

The reason roofless and I said check the timing is that being slightly retarded on this engine does make it get too hot, this can be checked with a strobe in 5 mins flat

Thank you for your reply again , was looking at booking the car in this week anyway for a check over so will ask the mechanic I use to check the timing . Have had several classics before but this is my first classic Mercedes and need that little bit of help and advice to get it right .. a big thank you to everyone who has helped me so far ..

 

[roofless]

this type of fault you would see more 20yrs ago when car's had manual timing adjustment ect this is not to say it is the fault but well worth checking to rule it out .car's today are just to smart by far

 

[classicmerc]

this type of fault you would see more 20yrs ago when car's had manual timing adjustment ect this is not to say it is the fault but well worth checking to rule it out .car's today are just to smart by far

Cheers , being a 1969 W114 230.6/8 makes it almost 40 years old and yes the car is fitted with the manual timing adjustment , this will be checked and will let you all know what it was once I get the car back .. thanks again ..

 

[classicmerc]

Hi everyone , well the Mercedes came back to day and the mechanic has told me the timing was retarded ever so slightly and this mixed with a leak from the water pump and a leaking "o" ring seal that sits between the top of the carb and the underside of the airbox had caused the problems which I was concerned about . As a matter of cause I am having the water pump looked at shortly and another full service before going back out in her .. Thank you to everyone who offered advice and suggestions along the way !!

 

[roofless]

Hi everyone , well the Mercedes came back to day and the mechanic has told me the timing was retarded ever so slightly and this mixed with a leak from the water pump and a leaking "o" ring seal that sits between the top of the carb and the underside of the airbox had caused the problems which I was concerned about . As a matter of cause I am having the water pump looked at shortly and another full service before going back out in her .. Thank you to everyone who offered advice and suggestions along the way !!

all small faults so not bad for the age.hope you get to enjoy it soon