BenzWorld Junior Member
Date registered: Aug 2011
Vehicle: 1973 280 w144 m110
Location: Wheeling, WV/Pittsburgh, PA
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New Member - '73 280 114 Rapid Overheating Issue
Three weeks ago I purchased a 1973 280 w114. I wanted a project car that I could turn into a nice local pleasure driver. I lurked here before purchasing and I want to say thanks to everyone who has posted info about these cars. I was able to negotiate price based on things I learned here.
When I purchased it, it ran and drove with only a few minor hiccups. I think its the original Solex carb that is giving me some headaches (rough idle, sketchy acceleration) but before I tackled that (or, I should say, before I find a mechanic to tackle it) I wanted to do as much as I could with the car first.
So far I have: Replaced the muffler and rear half of the exhaust, replaced all the fuses, drained the gas tank and filled with fresh premium fuel and a little Seafoam, new tires, new brake pads, replaced some bulbs, fixed a seatbelt, replaced a broken window motor, and some other minor cosmetic things.
So far, so good other than the pre-existing carb related issues.
Here comes my problem. On Monday I changed the oil. I used Castrol 20w-50 and the Purolator Classic filter that matches my car. The oil change seemed to go fine, that is, until I took it for a short drive and the car quickly overheated. The temp gauge shot up to redline and the radiator was boiling over. I let it cool and checked the oil level and the engine was almost two quarts over!
I drained the pan and saw that the oil was really dirty. During the first oil change, I had the car up on ramps and I wonder if all of the old oil didn't drain properly. Could that much oil have been resting in the low ends of the engine or pan?
The second time around I left the car parked flat to drain the pan. As the oil drained, it got progressively lighter as if the new oil had barely mixed with the old dirty stuff that didn't drain the first time.
I put fresh oil back in to the proper level and topped of the radiator with coolant. Cleaned everything up and took it for a ride.
Same thing happened. Within 10 minutes the car overheated and the coolant was boiling.
I can't help but think I did something wrong during the oil change as I have yet to have a problem with overheating.
Strange thing is, when I first got the car it was smoking a bit on start-up and after takeoff from a short idle (like at a stop light). I'm not getting any smoke now. But I would rather have a little puff of smoke than a rapid overheating issue. The engine sounds great (respectively) and I don't want to do any damage.
Any advice, experience or troubleshooting tips will be greatly appreciated.