I think you would be safe to tighten them to 15-20 ft lbs. 20ft lbs is pretty much the standard for heads.<br /><br />Hope and Pray that the aluminum block is still strong enough and just does not strip.<br /><br />TMD
18 to 20 ft/lbs is spec, which is pretty much the same as TMD said. I just wanted to mention you should retorque them after you warm up and then cool down the engine for the first time. They will have more to streach.
