BenzWorld Junior Member
Date registered: Apr 2019
Vehicle: 2x500SEC Euro early 80s/ 560SEC 88" Euro / Object 500
Mentioned: 0 Post(s)
Quoted: 15 Post(s)
500SEC Boiling when at idling (stand-by) app 600rpm for more than 6-8min
Bros, i know i have pulled this before, but the status is a little changed. And im very confused about what is the problem. Will try to explain:
lately my 500 1983 Euromodel has been working well again. - It was a problem before, been running well and no problem for 2weeks, but now similar problem are back yesterday.
- Yesterday and today at stand still in traffic jam it overheat (motor boiling) motor temp raises to above 120 C
This is only at idling (only if i stand-still in traffic jam with minimum rpm for more than 6min) temp raise from normally 92C to 120C+ within 5-8minutes. (outside temp has been around 26C) at both times this happen.
FAN running. OK.
NOTE: If i give a little trottle and rush the engine to 2000-3000rpm when in this situation (stand still) for 1min, then temp drop back to normal 90C. And the problem dissapear for new minutes.
So it is never a problem if i have a little rpm (over 12-1300rpm) and never when driving. And not a problem when i have a short stop for less than 3-4 minutes.
Rpm at idling (stand-still) is approx 600rpm and oil pressure is approx as always been 1.8 (same as my other 500SEC.)
No other problems experienced: Motor pulling well, no smoke, nothing to report, no use of cooling water.
What can it be?
- Termostat ?
- Electrical or some sensor issue?
- Air in coolant water?
- Poor coolant water quality, time to change?
- Other ?
Support is appriciated a lot, - Where to troubleshoot?