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4.0 valvecover gaskets aerostarthe trick to replacing the valve cover gaskets on a 4.0 aerostar is to remove the engine supports and letting the pan rest on the crossmember. this should provide enought clearance to remove the covers through the wheel well. don't forget to purchase the pleneum gasket as well. it has to be removed to change out the drivers side cover. it is a difficult job, but not impossible. be sure to checkfor any hard fitted lines attached to the engine before you lower it to avoid damage.
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Q: How hard are valve cover gaskets to change on '91 40l Van reeks of burn oil after 5 minutes Whats the likely source?
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