Thread: Valve adjustment

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What are the causes if u have the wrong valve adjustment.. And what grade oil would u gys reccomend for a small block 283?>?? and should my oil already be black after i broke it in and drove it a couple miles?

The results of valves adjusted too tight will be difficulty getting the motor to idle, low power and low manifold vacuum.

As far as a grade of oil, it's hard to beat a good multi-grade oil like 10W30. The "W" stands for winter, so in cold weather it acts like a thinner oil, yet protects in hotter weather like a 30 weight.

If your oil is black, it's probably due to the molybdenum disulphide that you used as a break-in lube. It is black as the hubs of hell.

Originally Posted by Shavenlaidblaze

and should my oil already be black after i broke it in and drove it a couple miles?

On a new engine the oil and filter should be changed immediately after the break-in run. Again after about 50 miles, then after 100 miles. This is to assure that all minute particles from machining and break-in are removed. Use a good oil filter. I prefer WIX brand. I suggest straight 30W oil until around 2000 miles. After that, if you prefer running a synthetic that would be the time to change over.

Originally Posted by Frisco

On a new engine the oil and filter should be changed immediately after the break-in run. Again after about 50 miles, then after 100 miles. This is to assure that all minute particles from machining and break-in are removed. Use a good oil filter. I prefer WIX brand. I suggest straight 30W oil until around 2000 miles. After that, if you prefer running a synthetic that would be the time to change over.

I would not change over to syn. oil until 5,000 miles but it really depends on ring material,finish in the bores ,oil, etc.