RRkev
Active Member
- Posts
- 430
- Location
- Forest of Dean, Gloucestershire
well i seem to still be getting high temperatures if stood in traffic for periods of time it peaked at 110 degrees the other day, this is after fitting a 80 degree thermostat kit, i've flushed the system through and put new coolant in but it's made no difference. so i have 2 possible causes.
1st being i have a alternative gearbox oil cooler fitted that is mounted onto the radiator i do notice at motorway speed and after climbing a hill temp does rise, it usually reaches upto 97 degrees at 70mph motorway use, and can peak at about 102 after climbing a hill so some of these temp differences could be down to the gearbox oil pumping extra heat to the cooler and transfering to the radiator.
2nd is the viscous fan and this is where i need help as there seems to be 2 ways people say these work.
some say they are temperature controlled and cut in around 95 - 100 degrees.
others say it's speed controlled (this includes on the bmw forums) so at idle speed it should be fully engaged, i guess this is with engine temp hot or cold.
anyway regardless of which above as soon as i start to get moving engine temp drops quite quickly, and i can feel hot air being pulled through the viscous fan, but i did the rolled up newspaper test this morning with engine temp at 95 degrees and ticking over i can stop the fan and get same resistance as if trying to turn the fan with the engine off. i certainly don't hear a roar from the fan running.
currently i've done 137000 miles so not sure how long these viscous units should last.
1st being i have a alternative gearbox oil cooler fitted that is mounted onto the radiator i do notice at motorway speed and after climbing a hill temp does rise, it usually reaches upto 97 degrees at 70mph motorway use, and can peak at about 102 after climbing a hill so some of these temp differences could be down to the gearbox oil pumping extra heat to the cooler and transfering to the radiator.
2nd is the viscous fan and this is where i need help as there seems to be 2 ways people say these work.
some say they are temperature controlled and cut in around 95 - 100 degrees.
others say it's speed controlled (this includes on the bmw forums) so at idle speed it should be fully engaged, i guess this is with engine temp hot or cold.
anyway regardless of which above as soon as i start to get moving engine temp drops quite quickly, and i can feel hot air being pulled through the viscous fan, but i did the rolled up newspaper test this morning with engine temp at 95 degrees and ticking over i can stop the fan and get same resistance as if trying to turn the fan with the engine off. i certainly don't hear a roar from the fan running.
currently i've done 137000 miles so not sure how long these viscous units should last.