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Re: celica 1.8 st
Hi, check your valve lash your lifters are not hydrolic, on 7AFE motor valve lash should be done cold and set at 0.15-0.25mm for intake and 0.25-0.35 for exhuast. On the 5SFE motor set cold also is 0.19-0.29mm intake and 0.28-0.38 for exhaust.
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the rattling noise most likely will be detonation. That is spontanious combustion before the spark occurs. causes vary but wrong octaine rating is one reason ,spark timing another.if you have an efi car it could be at the timing sensor. or a distributor car the saprk advance is wrong. Some efi engines can't adjust to hot weather to well so the fuel setting go out. however be aware that you have to have this checked out as it can still occur at higher revs it is just that you can't hear it. End result will be holes melted in the top of the pistons
MOTOR IS NOT GETTING ENOUGH OIL TO THE TOP END TO LUBRICATE VALVES AND LIFTERS. POSSIBLE SOLUTIONS; OIL PUMP NEEDS REPLACED, ENGINE NEEDS FLUSHED, OIL AND FILTER CHANGE. BAD RESULT MOTOR WILL EVENTUALLY BLOW UP IF NOT ATTENDED TO SOON.
Mits are well know for top end noisedue to hydrolic tappets. Note we are talking about a tapping or clicking sound here not a knock. You can try using an engine flush product if the noise is bad and then changing your oil. Follow manufactures instructions on the engine flush product. I have also used Marvel Mystery Oil (available at Walmart and most auto parts houses) with some success on this. Generally if the oil is not changed regularily eventually the tapping noise starts happening. FYI: hydrolic tappet can and do fail but generally the noise is associated with not maintaing oil changes
when you flushed with kerosene and diesel you mixed the same two things together,,,, I don't ever do this because it loosen up debris and gunk and deposit and puts them where you don't want it...if you are concerned then change your oil more often....the one time i did do it I added kerosene to the oil that was still in the engine and ran it for less than 2mins...its scary...the problem is most likely the lifters (tapits) it is far better to let them go than flush your engine like you did.....let em go or put new ones in....hope this helps
there is another thermostat in the car, the one that controls the air conditioning. i am presuming you are talking about the engine thermostat right? so here it is .
trace the hose that came from the top portion of your radiator. at the end of the hose is an aluminum manifold where the temperature sending units are located. if you remove this manifold, you can see your thermostat laying on top. it is supposed to control the flow of water from the engine to your radiator. replace it and in putting it back, i suggest you have a sealant ready for the right function. a water resistant and temperature resistant sealant that could be use in water manifolds in the engine.