Cylinder head removal

Toyota Previa Questions - 93 toyota previa having white ...

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CarGurusMar 17, 2013 - 93 toyota previa having white smoke while starting and stu-off while running on the road. ... Lift the cylinder head off the engine block and move to oneside. Remove the ... 1992 Toyota Previa 3 Dr LE Passenger Van ... was going down the road one day and it just shut off. it will turn over but wont crank.Missing: water

Rough idle, bad hesitation on acceleration, perfect idle with ...

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1994 Toyota Previa Questions ... Idle is perfectly smooth for first 1 - 2 minutes after overnight cold start, before .... This may be because the throttle position sensor is signalling just off idle. .... My check engine light came on with PO-420 code. ... theengine was turning over under starter motor that would bring the engine to an ...

Re: Replacing a Previa head gasket. - ToyotaVanTech

www.toyotavantech.com > Forum > Technical Discussion > Toyota Previas

Dec 3, 2011 - 20 posts - ‎2 authors
Okay, so you've got a Toyota Previa with a blown head gasket. ... The next few pix are taken after dropping the engine out from the bottom using a ... You can see a definite path between the water jacket and the cylinder. ... I believe this was a result of #1blowing and over pressurizing the cooling system.

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Your head bolts are stretched, when it got hot it weakened the metal in the bolts which means that the bolts cannot hold the needed tension on the head. Replace the bolts and you will stop blowing head gaskets. Also use Genuine Toyota head gasket, It will be a bit dearer but they are much better than aftermarket options.

Coolant or water in the oil can be from a head gasket leak, but it can also be an intake manifold gasket or a crack in the block or head etc. I would begin by removing the spark-plugs and then pressurizing the cooling system and checking each cylinder for signs of coolant entering them. If the cylinders stay dry and coolant goes into the oil during the test you most likely have an intake gasket that's leaking. Don't run thee engine with coolant in the oil or you'll have catastrophic damage!

It is located on the right raer on thr cylinder head.disconnect fuel linesto the fuel pump.romove bolts that attach pump to cylinder head.romove the fuel pump.Instalation is reverse of removal.Mke sure you clean mating surfaces of old gasket material install new gasket with rtv blackk
gasket to pump side & gasket to cylinder head mating surface

The best way to test a head gasket at no cost is to run the motor hot, then one by one remove the spark plugs and quickly put a mirror over the spark plug hole for approx 3/5 seconds. then quickly turn the mirror around, if you find the mirror is steamed up you not only know the head gasket is blown but you also know on which cylinder.

It is important to test each cylinder one at a time so that the steam doesnt escape the other cylinders through the open spark plug holes whilst you are testing the first few.

I hope this gives you some direction of where to start.

The 22R engine is one of the best engines Toyota built.

With the head off, you should have had the head gasket surface machined and the head checked pressure checked for cracks. It seems you did so.

I can only assume, you MAY have put the bolts back in without bowing out the cylinder block bolt holes before installing the bolts. These bolt holes fill with oil and antifreeze when you remove the head.

Doesn't matter how careful you are, the bolt holes always fill with fluid.

If so, the bolt torque would be reached before full clamping of the cylinder head. Worst of all, the block could have been cracked by the hydraulic pressure in the bolt hole as you tightened the bolt.

10 MM HEX HEAD SOCKET BIT AND A BREAKER BAR.YOU NEED TO KNOW THE CYLINDER HEAD LOOSE SEQUENCE TO KEEP FROM HAVING CRACKED OR WARP HEAD.YOU NEED HAYNES OR CHILTON MANUAL.BECAUSE SOME EARLY 90S TOYOTA CARS YOU HAVE TO LOOSEN HEAD BOLTS IN SEQUENCE.

it could be the ff.
1. radiator is clogged
2. no coolant
3. cooling fan is not working fine
4. thermostat valve is stuck up
5. water pump is damaged
6. radiator cap is broken
7. coolant is leaking somewhere
8. the worst is broken cylinder head gasket but broken head gasket always leaves a trace like water is draining w/o a drip or oil is mixing up with your coolant inside reservoir. try eliminating the easy things before deciding to have the cylinder head removed.

Hi
A cylinder head removal tool is provided for removing the cylinder head from the engine block of an engine.The tool comprises an elongated bar made of tool steel with means for bolting the bar to the cylinder head and for mounting pusher bolts which can be tightened down onto exposed threaded ends of frozen studs holding the cylinder head. As the bolts are tightened down onto the studs the cylinder head is gradually lifted upward free from the studs.
Thanks for contacting fixya.com

put new cylinder head gasket cover.clean the engine,if its check the cylinder head boltes and tight.