I have a lucida mpv toyota that is over heating it has already had a cylinder head fitted i want to take the head cover off to replace leaking seal i need to know what to set the engine at because of the vacum pump because there is a warning sticker which instructs to the manual which i havent got and also checking the water pump

20. INSTALL CYLINDER HEAD COVER SUB-ASSY
(a) Apply seal packing to the cylinder head as shown in the
illustration.
Seal packing: Part No. 08826-00080 or equivalent
NOTICE:

Remove any oil from the contact surface.

Install the cylinder head cover within 3 minutes after
applying seal packing.

Do not start the engine within 2 hours after installing.
(b) Install the cylinder head cover with the 9 bolts. Tighten the
bolt uniformly in several steps.
Torque: 8.0 Nm (80 kgf cm, 71 in.lbf)
(c) Install the engine wire harness with the 3 nuts.
Torque: 8.4 Nm (85 kgf cm, 74 in.lbf)
21. INSTALL CYLINDER HEAD COVER SUB-ASSY LH
(a) Apply seal packing to the cylinder head as shown in the
illustration.
Seal packing: Part No. 08826-00080 or equivalent
NOTICE:

Remove any oil from the contact surface.

Install the cylinder head cover within 3 minutes after
applying seal packing.

Do not start the engine within 2 hours after installing.
(b) Install the cylinder head cover with the 9 bolts. Tighten the
bolt uniformly in several steps.
Torque: 8.0 Nm (80 kgf cm, 71 in.lbf)
(c) Using an E6 torx) socket wrench, install the engine wire
harness protector with the 2 bolts.
Torque: 8.4 Nm (85 kgf cm, 74 in.lbf)

This is year/make/model specific to the 2nd Gen Sienna. Taken from the 05 Toyota Sienna repair manual. Hope this answers your torque specs for the valve covers which uses 10 mm bolts. If in doubt, as Scotty Kilmer asserts, do a "German tight".

You nneed to replace the valve cover gasket.

Quite possibly the motor will be OK after replacement of one or both head gaskets. This can be done with the engine still in the car. The definitive tests for whether this is needed are a compression test (shows head gasket leaks) and a radiator leak-down test (shows water jacket coolant leaks).
If it turns out the job is required it is a good idea to have the timing belt and water pump replaced also, and the crankshaft nose and camshaft oil seals. The cylinder head faces and mating block faces must be carefully checked for flatness.
Although more expensive it is advisable to specify genuine Toyota seals and gaskets as the cheaper non-genuine ones do not last on this engine.
The V6 has several characteristic oil leaks which develop, and that may not be related to the head gasket problem. It will leak from
- rear bank cam cover gasket, onto the exhaust- distributor shaft o-ring seal- oil filter bracket o-ring seal (if present)
These can be replaced at the same time.
The alternative is to have a 2nd hand motor fitted, which is always an unknown, but if you can get a warranty that will be better.
Get several quotes for each alternative, and try to gauge the reputation of the mechanics
http://www.cartalk.com/content/mechanics-files

REMOVAL & INSTALLATION

1C-LTC and 2CL-TC Engines
(see Figures 1 and 2)

1. Disconnect the negative battery cable. Remove and label all electrical wiring, connectors and vacuum hoses necessary to gain removal clearance.

Fig. 1: Loosen and remove the cylinder head cover retaining nuts

1. Disconnect the PCV hose.
2. Remove the six nuts and seal washers from the cylinder head cover. Loosen them in a crisscross pattern.
3. Remove the cylinder head cover and the cover gasket from the cylinder head. Discard the gasket and replace with a new one.
   

To install:

1. With a wire brush or gasket scraper, remove all the old gasket material from the cylinder head and the cylinder head cover gasket surfaces.
2. When the cylinder head surfaces are free and clean, apply beads of sealant to the cylinder head in the locations shown in the accompanying illustration.

Fig. 2: Be sure to apply sealant on the cylinder head prior to cover installation

1. Install the new gasket in the cover. Make sure that the gasket seats evenly.
2. Place the cover with the gasket onto the cylinder head.
3. Install the six nuts and seal washers. Tighten the nuts to 65 inch lbs. (8 Nm).
4. Connect the PCV hose. Connect all removed vacuum hoses, connectors and electrical wiring. Connect the negative battery cable.
5. Start the engine and inspect for oil leaks. Repair any leaks as necessary.

Hope this help (remember comment and rated this).

Probably the oil seal for the valves on the cylinder head are not good,oil is passing through then comes in the cylinder chamber,when it burn the engine oil it makes that white smoke.

Hi,

That engine will leak oil from

- cam cover gaskets (rear one drips on the exhaust)
- camshaft end seals
- distributor shaft o-ring (appears on top of transaxle housing)
- oil filter bracket to block o-ring seal (drips on front bank exhaust)
- crankshaft nose oil seal (have done with timing belt change)
- rear main seal (expensive, leave it be)

help cant get a manual for our car, change head but unable to find the torque setting for it, its a toyota lucida estima 2.2 thanks

You have worn valve stem oil seals. These fit over your valve stems and prevent oil from running down the valves into your cylinders.To replace them you have to remove the cylinder head and remove each valve in turn to replace them.

hi if your engine 22R front engine first in side timing cover where engine bully fitted there is oil seal, next valve cover front side between cover and head there seal not like oil seal half cercle shap it makes leak also front side of the camshaft there is oil seal..