Question about Chevrolet S 10

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I have a 1995 s-10 with the vorteh i just changed the thermostat and that night it was a little cold out and noticed when i started it it taped but went away after a min or so this has happened the last couple of nights the oil is a little low but still in the safe zone

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In modern engines the linkages between the cam lobes and the valve stems have the 'lash' (general looseness) taken up by hydraulic lifters. These are oil pressurised syringe like devices that expend due to oil pressure. On cold days the oil initially has increased viscosity and it takes anywhere from 30 seconds to a minute to pressurize these lifters. Until they become pressurized you will encounter same taps and clatter fro the valve train and this is absolutely fine. If you ever have persistent clatter when the engine is hot this is often a sign of bearing wear or piston slap. You say your oil is little low, again not to worry too much, but not too low to register on the dip stick. Try not to overfill the oil as it will be churned and foamed by the crank action and then be carried over in the positive crankcase pressure release system to the inlet manifold creating lots of smoke and potentially fouling the plugs.

Posted on Sep 16, 2010

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Sounds like the hydraulic valve lifters are on the way out causing the ticking noise. In the past I have been sucessful using a top-end lubricant such as Marvel Mystery Oil added to the crank case which extended the life of the lifters for many months

Posted on Sep 16, 2010

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