Question about 1994 Toyota Previa
Look closely at the valve cover there should be a cap that seas oil.
Posted on Feb 16, 2012
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Posted on Jan 02, 2017
Your truck is going to take about 5.5 quarts.
Since your motor have some high miles on it, I would use non-synthetic 10w-30 oil that has the high mileage formula.
Synthetic will cause leaks on an old engine because the molecules are smaller and will go through gaskets easily.
High mileage formula will help recondition the gaskets.
Posted on Mar 18, 2009
SOURCE: toyota previa 1991
the oil should be black,brown or gold(new) with no other colors in it. shouldnt be milky or streaky. the trans fluid should be light red or semi light red.as for the engine being oily its hard to discern unless you rinse it off to metal and drive it. if you mean the oil pan has black oil on it then it may be ok.
Posted on Mar 26, 2009
The toyota previa uses a formed silicone gasket for the valve cover and the cover is held in place by metric shoulder bolts ( 10mm). The valve gasket leaks because you can't get enough preload on the bolts to re-seat the old gasket when it gets old and shrinks. The shoulder bolts only allow you to tighten the gasket enough to seat the shoulder on the bolt. If you continue to torque down the suspected bolts, you will snap the bolt off ( don't ask me how I know this ). You can either 1.)replace the old gasket with a new one or 2.) remove the existing bolts around the leak area and put in new metric bolts that do not have a shoulder. You may want to put in a small sleeve into the existing bolt hole but shorter than the thickness of the valve cover to account for the smaller diameter bolt. You can now torque down the bolt and get enough preload to seal the valve cover without removing the old gasket. Make sure you use a torque wrench ( in-lbs) or be very careful not to snap these small valve cover bolts.
Posted on Jul 15, 2009
It's depend on the weather condition of your area and is your motor a leaker.
10W40 should be fine,if you are live in above freezing area
10W30 for colder climate
15w-40 if your motor has a small leak AND drive in above freezing area.
Posted on Nov 11, 2009
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