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1991 hiace too old ?

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I just bough a toyota hiace with sliding window. to travel around.I found one for not to expensive ,1991 model petrol automatic but it got 300 000 km already.

I saw the compression test: betwen 125 psi to 160 psi for the 4 cyclinder

and leack test betwen 30 to 38% for the 4 cylindre.

I m not sure how bad is it. but the engine seems to run pretty good. the fuel comsuption doesn t seems very good , i have to calculate it but seems i will do only 350 to 400 km with a full tank.

is there a way to improve the fuel comsuption for old engine like this?

I m not sure but seems there is a leack from the head gasket.there is a black sticky stuf on one front top side of the engine.It s just behind the fan.is that possible? should i fix it urgently? could affect the fuel consuption?

worth to convert an old engine in gaz? i heard there is an help from gouvernement. any advise or information ?



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