2007 Toyota Corolla 140i - Answered Questions & Fixed issues
How do I confirm or who can I take my car to to verify if the inlet manifold is cracked or leaking.
Assuming you mean intake (vs inlet) manifold, there are two common procedures.
1. One of them involves blowing smoke into the vacuum system with the engine off, whereupon it will ideally be seen exiting from the area where a leak exists. While most use a smoke machine, I have seen one guy simply blow the smoke from a cigar into a hose that he pulled off of the manifold.
2. The second entails getting something into the leak from outside while the engine is running. I have seen both water and propane (even carburetor cleaner) used for this method. The idea is that whatever agent used will be sucked by engine vacuum into the manifold, then into one or more of the cylinders. If water, the engine will stumble. If a flammable product, the idle will surge upon burning the new and unexpected fuel material.
Staying on #2, if either stumbling or surging occurs, you have just confirmed a leak because nothing introduced from outside the manifold should be entering the combustion chamber and impacting the operation.
You can also squirt around all vacuum hoses to determine whether any of them is the culprit.
While a huge percentage of mechanics are not fully qualified for diagnosing less than obvious engine issues pertaining to electronics or idle problems, most should be acquainted with the methods described above. But ask first to verify they own a smoke machine if ending up seeking outside help.
10/14/2016 1:14:14 PM •
2007 Toyota...
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Answered
on Oct 14, 2016
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Valve clearances toyota 7afe engine
Toyota 7A-FE valve clearance (measured cold):
- Inlet: 0.15 to 0.25 mm (0.006 to 0.010")
- Exhaust: 0.25 to 0.35 mm (0.010 to 0.014")
Source: https://workshop-manuals.com/toyota/corolla_sedan_4-door/l4-107.5_1762cc_1.8l_dohc_(7a-fe)/maintenance/tune-up_and_engine_performance_checks/valve_clearance/system_information/specifications/page_815/
It a Toyota corolla nze 2001 with mileage 200k km
As advised by your mechanic, my advise is no different, in the gearbox there are what we term as teeth of different gears and synchronizers...being in such behaviour, your car needs a gearbox overhaul or replacement depending on which will cost you less
1990 corolla 4afe engine overheating
For many of the 90's and 2000's Toyota various models - Camry, Tacoma, 4 Runners, Corolla, and some other models it is usually caused by temperature sensitive fan switch on the radiator not operating. Electric fan on the radiator should operate when temp above 200 degrees. Less often the control relay 90987-03003 is defective. Check if bubbling in the radiator smells like exhaust. That would indicate a blown head gasket. A jumper wire from your marker light positive to the lower contact in the fan control relay socket will operate your fan when parking lights are on. The larger vehicles with more powerful radiator fans will need a hefty jumper from a headlight positive to avoid overheating the lighting wiring.
Why is 2011 Toyota Corolla that has 79,000 miles jerking on long distances?
Problems that only occur after 4 hours driving would be very difficult to diagnose. I would take it to a garage that has a professional grade scan tool and ask if they can access the historical data to check for the cause. Otherwise you just wait until it becomes a regular occurrence or the Engine Malfunction Light comes on.
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