I have a taco v6 4.0 that has an external HG leak , no coolant in oil or vise Versa. Shops keep telling me to drop a used motor in it and no one wants the job to do the HG. under 100k miles , not sure what to do 🙃
This is a very helpful tip, which many other videos overlook. Although this information is also noted in the service manual at EM43, the manual doesn’t specifically mention rotating the crank counterclockwise by 40 degrees. In my view, if Cylinder 1 is at TDC on the compression stroke with the valves closed, there’s no risk of valve-to-piston contact. Therefore, it should be safe to rotate Camshaft #2 to the 90-degree position. Am I overlooking something?
The Toyota FSM I used specifically outlines this procedure. If you rotate back 40 degrees, no piston is at TDC. I’m thinking this just makes it safer when rotating the cams to/from timed position especially if you accidentally go past due to the springs pushing on it.
As far as I know, the 4.0 doesn’t have a MAP sensor. If you have a check engine light, the code can be for a Barometric Pressure Sensor (BPS) which is incorporated into the Mass Airflow (MAF) sensor at the top/front of the engine. So maybe try cleaning that first with contact cleaner and microfiber (get the edges of the plate). If you clean or replace, make sure to disconnect the battery for at least ten minutes, then reconnect and drive. It may die on the first start attempt, but give the computer some time to readjust to the new airflow amounts.
My coolant and oil are not mixing but coolant is burning out of the exhaust. Very slow leak, im thinking it may be a manifold water jacket. Any thoughts?
Good way to rule out the headgasket would be to pressurize the coolant system then wait 20 mins and borescope the cylinders. Mine passed the exhaust gas tester and didn’t smell til right when I figured it out, but 5 of 6 cylinders had tiny leaks. The exhaust gas pressure also boiled the overflow reservoir (but that could’ve been the radiator cap).
I have a taco v6 4.0 that has an external HG leak , no coolant in oil or vise Versa. Shops keep telling me to drop a used motor in it and no one wants the job to do the HG. under 100k miles , not sure what to do 🙃
Sounds like you’ve got some time to think about it but yeah, they’re typically worth fixing. If you don’t someone else will!
This is a very helpful tip, which many other videos overlook. Although this information is also noted in the service manual at EM43, the manual doesn’t specifically mention rotating the crank counterclockwise by 40 degrees. In my view, if Cylinder 1 is at TDC on the compression stroke with the valves closed, there’s no risk of valve-to-piston contact. Therefore, it should be safe to rotate Camshaft #2 to the 90-degree position. Am I overlooking something?
The Toyota FSM I used specifically outlines this procedure. If you rotate back 40 degrees, no piston is at TDC. I’m thinking this just makes it safer when rotating the cams to/from timed position especially if you accidentally go past due to the springs pushing on it.
You are legend 😎
Hi. Bro, can you help me? I've a tacoma 2006 4.0 and i dont find the MAP (Manifold Absolute Pressure) sensor. Can you tell me where is located?
As far as I know, the 4.0 doesn’t have a MAP sensor. If you have a check engine light, the code can be for a Barometric Pressure Sensor (BPS) which is incorporated into the Mass Airflow (MAF) sensor at the top/front of the engine. So maybe try cleaning that first with contact cleaner and microfiber (get the edges of the plate). If you clean or replace, make sure to disconnect the battery for at least ten minutes, then reconnect and drive. It may die on the first start attempt, but give the computer some time to readjust to the new airflow amounts.
Thanks for the information. The truth is that no one told me that I didn't have a sensor map. I'm so thankful bro
My coolant and oil are not mixing but coolant is burning out of the exhaust. Very slow leak, im thinking it may be a manifold water jacket. Any thoughts?
Good way to rule out the headgasket would be to pressurize the coolant system then wait 20 mins and borescope the cylinders. Mine passed the exhaust gas tester and didn’t smell til right when I figured it out, but 5 of 6 cylinders had tiny leaks. The exhaust gas pressure also boiled the overflow reservoir (but that could’ve been the radiator cap).
@ you may have passed the exhaust gas test because ur thermostat was closed
Thermostat was not closed.
@@themotofirm this is also a issue ive had in the summer i fail exhaust gas and in the winter i pass. Assuming its the temp