With 211k miles and there is a strange chemical/exhaust smell in the cabin..had the whole exhaust underneath replace with a new, the oil pan changed, and stll has a weird smell that I can almost taste.
The heater core is leaking.
SOURCE: 1993 TOYOTA TERCEL 1500cc Valve Seals Replaced now smokes much worse
You either have had the wrong valve seals installed, they are physically missing, or the valves are incorrect (too loose in the guides/stem too thin). The rocker arm seals will not contribute to your issue. If it did not have the oil smoke before you took the head off, the issue is with whatever the machine shop did. Valve seals have to fit TIGHT, or oil will go down the valve stem into the intake.
Take the head back to the machine shop & tell them to fix it. For free.
SOURCE: excessive heat on floor pan of an 80 series toyota landcruiser
You need to Replace the Padding underneath the Carpet. It is there in part too Absorb this Heat.
SOURCE: 1992 Toyota Previa van,Oil dripping onto exhaust manifold, replace head gasket? need a free manual!
The toyota previa uses a formed silicone gasket for the valve cover and the cover is held in place by metric shoulder bolts ( 10mm). The valve gasket leaks because you can't get enough preload on the bolts to re-seat the old gasket when it gets old and shrinks. The shoulder bolts only allow you to tighten the gasket enough to seat the shoulder on the bolt. If you continue to torque down the suspected bolts, you will snap the bolt off ( don't ask me how I know this ). You can either 1.)replace the old gasket with a new one or 2.) remove the existing bolts around the leak area and put in new metric bolts that do not have a shoulder. You may want to put in a small sleeve into the existing bolt hole but shorter than the thickness of the valve cover to account for the smaller diameter bolt. You can now torque down the bolt and get enough preload to seal the valve cover without removing the old gasket. Make sure you use a torque wrench ( in-lbs) or be very careful not to snap these small valve cover bolts.
SOURCE: To change the oil pan gasket in a 93 Tercel
Stock the car doesn't come with an oil pan gasket but you can order one from rockauto.com you don't have to remove the A/C compressor for any of the jobs you listed. If you want to change the timing belt you need to remove the plastic rock guard under the motor on the passenger side. remove the spark plugs and using the socket turn the engine from the crankshaft clockwise until you are at TDC on #1 cyclinder. (compression stroke) Next remove the upper and lower plastic timing belt covers. The idler pulley is the one with the spring. Loosen the nut and remove the spring then you can remove the timing belt. It really isn't that hard to do. Maybe one afternoon.
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My mechanic says it's my not heater core, suggested I go get the bottom of the car steamed cleaned, thinks it's burning oil from when the oil pan issue took place.
I got the engine and underneath cleaned, but still smells like "something", has my throat irritated. I need some help badly...I can't get a another car until next month, but this is making me so mad!!!!
Make sure you close the vent and put it in recirculation
I'm sorry, I don't know what that means.
Do you think there's still old oil in the engine that has dried (I didn't get the oil pan leakage problem underneath fixed for a couple of weeks), and the mechanic says it's just old oil burning.
The vents,you know how the heater and fresh air system operates,that vent
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