ls400beast

Well my lexus misteriously stated over heating i have replaced the Folloing
1 thermostat
2 Water Pump
3 temperature sensor
i have tried Trouble shooting it but the needle always stays about 1cm below the red hot incator on my dash any insight as to what might be causing it radiator has good compression and no leaks were detected and fans work out of ideas of what it might be your insight is appreciated

python

iTrader: (4)

air bubble in the system...did u bleed it?

ls400beast

nope i didnt dam it simple stuff can set me back

ls400beast

bled it still says it gets hot problem With the dash maybe so any one have suggeer instions no water in the oil

python

iTrader: (4)

what are we talkin about here? its actually over heating or just getting a little above the normal mark on the gauge...are the fans coming on when it starts getting warm? check both radiator hoses and see if they are both hot..or is one hot and the other cold?

johnnyg66

Did you run the heater full blast when you bled the system?

ls400beast

i followed lexls tutorial http://www.lexls.com/tutorials/cooling/coolant.html i have attached pics below both fans turn and everything seems fine just bugging me i wanna get this working right because i would hate to let this baby go so in conclution cat seems not to over heat but needle says othe wise

GH5T

I don't think your temp gauge is sweeping correctly. If the indicator stops where you say it does when the car is off it is not returning to 0. The needle should be resting at or just a hair below the C on the temp gauge when the car is off or key on / engine off.

GH5T

johnnyg66

Yes, my temp needle too went haywire would not tell correct reading. Bought a new one and it was ok. The car was not overheating.

j2b4o

My 90' has a similar issue with the temp needle. It stays above cold when the car is off and when warm sits slightly above the middle mark(where middle would be if the cold was where the needle rested). It has never gotten better or worse but last week the tach stopped working with what almost seems like the opposite problem. The needle fell way below 0rpm all the way to rest on the bottom of the cluster and now doesn't move at all unless I'm revving high like 4krpm it jumps a little.
I personally think whatever secured the mechanisms for the needles behind the dash is failing causing the needles to go out of alignment.
But that just a theory.

python

iTrader: (4)

u failed to mention that didn't you? how can u expect anyone to give advice when ur not divulging all the information.

Yamae

Sounds like the LLC is not circulating. Since you have already replaced both the water pump and the thermostat, what I worry about is the clogged radiator or the foreign object in the hose.

Did you check the water flow there? it can be done removing both hoses and pour the water from the upper hose. The water should be coming down and coming out quickly.

ls400beast

The problem was thath the needle was not reading properly replced the whole dash cluster fixed the problem thanks you all for your imput and help ihave 90ls 400 repair manual and if any of you need something from it PM ME i will gladly give you some help