Danny Kiwi 0 Report post Posted August 10, 2008 My 86 320 i Is overheating a lil bit and I think it may be Air in the CoolingSystem ,Dont think its the Gasket as there are no tell tale signs in the Olil or Nasty Smells in the Expansion Tank,What is the best way to Bleed these Cooling Systems and another thing is the 86 320i Chain or Belt Driven Timing Chain Setup?? Ta Quote Share this post Link to post Share on other sites
hotwire 352 Report post Posted August 10, 2008 Cant remember if Ljet M20 has a bleed screw in the thermostat housing, the later Motronic does. If it does - bleed through that. If not - I normally 1/2 -2/3 fill the system, heater on & get engine up to temperature allowing air to bleed out - then fill up as required. They can be a prick for airlocks. Unlikely though if the cooling system hasn't been touched. Is it using water? - Could be thermostat They are common for head gaskets when they have been overheated -have you checked the oil for water in it? If using water - could also be consumming via combustion & not into oil. Also - M20 engines are belt driven (& interference) so make sure belt is replaced as per schedule Quote Share this post Link to post Share on other sites
