Question 1

How to remove and install cylinder heads in 3.0L and 3.3L V6 engine on Toyota Highlander?

Accepted Answer

First of all, one needs to unplug the cable from the terminal of a battery; meanwhile to get rid of the cooling system and the engine block one needs to drain them as well. Subsequently, it is necessary to take out the upper and lower intake manifolds, and exhaust manifold(s). Remove and later bolt off the alternator/cooler bracket as well as the power steering pump bracket. Continue with the unbolt and pull out the timing belt, camshaft sprockets, and the upper idler pulley Then, the other bolts on the rear timing bell covers must be unscrewed and the cover detached on the engine block and cylinder heads. Remove the two connectors from the coolant sensor and the water transfer casting as well, add a condition that the transfer hose must be replaced every time the intake manifold is being removed. Extract the camshaft(s) of the head(s) to be removed and pull out the connectors of the camshaft position sensor and the VVT oil control valve. Bay the bolts at the back of the cylinder heads and uncover the situation of the engine wiring harnesses. Using an 8 mm hex bit, take out the recessed head bolts next, then turn the rest of the cylinder head bolts in 1/4 turn intervals to shed, along with hardened washers. Remove the cylinder head from the engine block with a little force if needed; you can use a wooden block and hammer to do this and do the same to the other head if it was required. As far as the installation is concerned, the mating surfaces of the cylinder heads and the block must be free from contamination, therefore, use a gasket scraper and clean it using a lacquer thinner or acetone. Metting surfaces, evaluate, for existence of scratches or any other damages and correct them if found. If there are threads in the cylinder head bolt holes, chase them with a tap, and blow the debris with compressed air. Clean each bolt in a vise and using a die apply it down the threads to 'lubricate' the bolts, replace any thin or worn bolts. Align the new gaskets properly over the dowel pins in the block, and put the head carefully on the block without anay disturbance to the gasket. Coat the threads of the head bolts with clean engine oil, then spread the head bolts back into their original positions and provide a turn using fingers. According to the suggested sequence, the tightening torque of each bolt should be checked and taken note of the orientation of each bolt head by applying paint. Loosen each of the 12-point bolts and after that, you tighten them 1/4 turn more and then the recessed bolt has to be tightened. Perform the same procedure for the other cylinder head and carry out the rest of the installation process, starting from the final step, to order. Last of all, add the liquid necessitated for the cooling system, replace the oil and the filter, start the engine and look for dripping.

Question 2

How to remove and install the cylinder heads in V6 engine on 1995 through 2004 Toyota Tacoma?

Accepted Answer

Before removing the cylinder heads, turn off the engine, open the hood and unfasten the negative terminal of the battery, get the anti theft code if there is any. Pull out the coolant, intake air housing plenum, fuel inlet and out tubes, injectors, exhaust flange, alternator belt and web, distributor if any, intake manifold, timing belt, camshaft gears, and the upper wheel/pulley. Lift of the upper timing belt cover and pull the camshaft(s) out from the heads. For the 3.4L engines, the hex bit should be used to remove the recessed head bolts and 1/4 turn of the cylinder head bolts to come out until it is held by hand then lifting the cylinder head off of the engine block calmly to avoid deformation. Do the same with the other head. When installing, the mating surface should be clean using gasket scraper and cleaning agents; the surfaces should be inspected for a damage. Follow up the threads in the cylinder head bolt holes and blow it with compressed air. Remove the bolts, cut each one to the length you need and re-thread them in a vise to restore the gnarled threads: place new gaskets over the dowel pins in the block. Place the head on the block such that the gasket does not get shifted, lubricate the threads of the new bolts to be used generously with clean engine oil and then screw them in the holes originally occupied by the used bolts and just tighten them as much as can be done by merely applying hand pressure. According to the order mentioned above, then apply the required force to tighten up bolts and later use some identification mark to differentiate the former position of the bolt head. Turn every bolt an extra 1/4 turn two times, and turn the recessed bolt for vehicles with 3.4L engines. Do the same for the other cylinder head and perform all the following steps in order installed in its reverse manner. Last but not the least is refilling of the cooling system, changing of oil and filter, testing the engine and searching for any leaks.

OEM Toyota Cylinder Head

139 Cylinder Heads found

Toyota Cylinder Head Part Number: 11101-79266

Toyota Cylinder Head Part Number: 11101-79276

Toyota Cylinder Head, Driver Side Part Number: 11102-39245

Toyota Head Sub-Assembly, Cylinder Part Number: 11101-29485

Toyota Head Sub-Assembly, Cylinder Part Number: 11101-80017

Toyota Cylinder Head Part Number: 11101-39675

Toyota Cylinder Head Part Number: 11102-39236

Toyota Cylinder Head Part Number: 11101-13062

Toyota Cylinder Head Part Number: 11101-21034

Toyota Cylinder Head Part Number: 11101-79106

Toyota Cylinder Head Part Number: 11101-21062

Toyota Head Sub-Assembly, Cylinder Part Number: 11101-59166

Toyota Cylinder Head Part Number: 11101-21080

Toyota Cylinder Head Part Number: 11101-28012

Toyota Cylinder Head Part Number: 11101-28011

Toyota Cylinder Head Part Number: 11101-39686

Toyota Cylinder Head Part Number: 11101-80000

Toyota Cylinder Head Part Number: 11101-0H010

Toyota Cylinder Head Part Number: 11101-49365

Toyota Cylinder Head Part Number: 11101-54050

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