Smells problem
2004 Nissan Xterra 6 cyl Front Wheel Drive Automatic 54000 miles
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I just had my Xterra pressure tested to find a coolant leak. They said is is leaking in the valley under the intake manifold and need to replace by pass hose, reseal thermostat housing, and install new t-stat. They also said I needed to replace the knock sensor. They gave me an estimate of $727.00. Does that sound reasonable to you? Unfortunately, I am not very knowledgable with cars and tend to get ripped off. I went to the dealer and just want to know if this estimate sounds about right.

Thanks for your help.

Hi dawrob,

Prices quoted by dealers should be correct but why not get a second opinion if you are not sure.

List the things you want done and get it quoted by other reputable repair shops.

dawrob

I don't know if you already had your Xterra leakage problem fixed. I have the same year and model Xterra but with about 57,000. On my Xterra there was some signs of anti-freeze around the neck of bypass hose connector to the manifold. The mechanic told me replacing the bypass hose will be $310 but he does not believe the leak is bad enough to do that. He said just to keep an eye on the anti-freeze level making sure it stays normal level. I believe your problem was similar but the pressure testing damaged your manifold gasket, thermostat housing gasket, thermostat, and bypass hose connection. If your engine needed a new knock sensor it should have registered as an engine error code when the SERVICE ENGINE SOON light came on.