Join Date: Apr 1999
Location: Justin,Texas, Republic of TEXAS (USA)
Feedback Score: 0 reviews
HLA's are a cylinder with a piston inside and also a return spring. The new HLA's will be springy due to no oil inside but the ones removed are full of oil and will not yield without some force. The HLA has an oil inlet check valve but for it to compress oil has to escape between piston and the HLA bore. This will happen as it should in engine with engine at normal operating temp and oil that is 180+ degrees. Effectively there is no way to hold it in your hand and determine it is bad other than to inspect for wear on the ball end where rocker arm rests.
This is what James was meaning by using vise to see if will compress and oil will escape. You would have to apply pressure, wait, pressure, wait, pressure, wait until the HLA bleeds the oil out and compresses.
Did the rocker arms get inspected for condition of the rollers and tips?
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