Allright. Took a few weeks to find time to replace fan clutch and "what ever lambda with bosch lambda".
After removing fan clutch, it was really stiff compared to the new one. Neither of the freewheel very well, but old and new one differ like night and day. Bosch lambda had some kind of grey paste on the threads, which the unknown b$ brand did not.
After startup no fan rattle like before.
Took a quite long test drive in following phases. (50% of the RAD still blocked by cardboard).
1) Cold engine startup, from suburb (less than 1 km) to road, about 3 miles (5km) @ 50 mph (80km) to high way.
2) 12 miles ( 20 km) @ 60 mph ( 100km/h ) at highway.
- Cabin heat gauge was at 1/2 of the scale
- IR gun gives around 167F (75C) from stat housing.
3) 12 miles ( 20 km( @ 50 mph (80km/h) back on the country road next to above mentioned highway
- Cabin heat gauge came down to about 1/3 scale
- IR gun gives same 167F (75C) form stat housing
4) about 5 miles (8km) town cruising with several stop lights etc
- Cabin heat gayge came down almost the gap between Cold and "normal".. say 2-3mm (0.0787401575 inches) above the gap between C and normal.
- IR gun gives 165-167F (72-75C) from stat housing
After phase 1 idle rpm was allways OK.
No CEL light.
Conclusions.
- Bad fan clutch
- Bad lambda
Suspections about cabin/dash temp gauge. In this -91 Vitara for Swedish market with G16A engine the gauge seems to work logically compared to engine load. Thus I suspect it does actually measure temperature from somewhere else than stat housing. And most probably ECU reads the stat housing as I had always good idle around 800 RPM even tho the dash gauge was going anywhere between nearly cold and 1/2 of the scale.
Suggestions: If you live in country with winter temps (temp goes 5-30 below freezing), 80C ( 167F ) STAT is b$. I am going to the 88/90 (190/194F) STAT when I can find it somewhere.
Thank you fixkick for your info and help.
== EDIT ==
Ach.. Forgot the outside temp.
On the afternoon test drive outside temp was 2C (35.6F).
After removing fan clutch, it was really stiff compared to the new one. Neither of the freewheel very well, but old and new one differ like night and day. Bosch lambda had some kind of grey paste on the threads, which the unknown b$ brand did not.
After startup no fan rattle like before.
Took a quite long test drive in following phases. (50% of the RAD still blocked by cardboard).
1) Cold engine startup, from suburb (less than 1 km) to road, about 3 miles (5km) @ 50 mph (80km) to high way.
2) 12 miles ( 20 km) @ 60 mph ( 100km/h ) at highway.
- Cabin heat gauge was at 1/2 of the scale
- IR gun gives around 167F (75C) from stat housing.
3) 12 miles ( 20 km( @ 50 mph (80km/h) back on the country road next to above mentioned highway
- Cabin heat gauge came down to about 1/3 scale
- IR gun gives same 167F (75C) form stat housing
4) about 5 miles (8km) town cruising with several stop lights etc
- Cabin heat gayge came down almost the gap between Cold and "normal".. say 2-3mm (0.0787401575 inches) above the gap between C and normal.
- IR gun gives 165-167F (72-75C) from stat housing
After phase 1 idle rpm was allways OK.
No CEL light.
Conclusions.
- Bad fan clutch
- Bad lambda
Suspections about cabin/dash temp gauge. In this -91 Vitara for Swedish market with G16A engine the gauge seems to work logically compared to engine load. Thus I suspect it does actually measure temperature from somewhere else than stat housing. And most probably ECU reads the stat housing as I had always good idle around 800 RPM even tho the dash gauge was going anywhere between nearly cold and 1/2 of the scale.
Suggestions: If you live in country with winter temps (temp goes 5-30 below freezing), 80C ( 167F ) STAT is b$. I am going to the 88/90 (190/194F) STAT when I can find it somewhere.
Thank you fixkick for your info and help.
== EDIT ==
Ach.. Forgot the outside temp.
On the afternoon test drive outside temp was 2C (35.6F).