Question about Toyota Previa

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Hello there i recently had a blown head gasket replaced on my 91 toyo previa, prior 2 this repair, i was getting 17-18mpg, the vans timing specs states that it should be at i believe wat u wld say 5 degrees, it was at 25, after another mechanic try 2 adjust it 2 the correct specs, he was unable 2, the more he lowered it 2 the right spec the van wld shut off, he stated that the timing belt was set incorrectly when the gasket was replaced, he stated that it needs 2 b adjusted correctly,,,,, i talked 2 the mechanic that did the head job & he said that he placed the timing belt exactly the way it was b4 he did the gasket, but now its giving me 12mpg, its sucking up gas like a v8 engine. so the mechanic hu did the job said he needed the camshaft timing specs. wld u happen 2 know what that is? or can u guide me 2 the right way 2fix this.... on a side note when i bought the van last year the guy ihad bought it from told me he had replaced the head gasket this was like in aug 09.... around 1 month ago i took a long trip the van ovrheated while driving in the hwy, when i opened the hood the radiator hose had come off the radiator, i put it back on filled it up with 50/50 radiator fluid, & a week later the gasket blew. plz help, oh yeah the engine is also rattling & when going uphill it doesnt have as much power as it did b4

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There are timing marks that you line up before you install the belt back on. It is possible that the belt was put on, one tooth off. I don't know of any "camshaft timing specs". The best thing that I could think of doing is to check to verify that all the timing marks are lined up exactly right.

Posted on May 02, 2010


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