Setting valve lash I've been researching the setting of the valve lash on my C59A but am still left will some things being unclear. First, what should the lash be set at?. there seems to be quite a few different numbers out there. I'm thinking .014EXH and .010INT but have seen other numbers given as high as .018 and some suggesting the same lash on INT and EXH. The next thing that is not clear is what prevents the adjustment screw from "self adjusting". There is no lock nut that I can see and I've read that some use, what I gather, is two sections of thread slightly out of phase from one another to create a friction grip to prevent the screws from moving easily (or something to that effect). This seems to me like it would work as long as you are only adjusting the screw in to increase lash. As soon as you have to back it out to reduce the lash, the tension would be lost to my way of thinking. Could use blue locktite??. I'm thinking of doing my lash adjustments out of the engine so using locktite should not be too difficult unless there is a reason not to use it or it's just not necessary. Just looking for some clarification and insight before I start.
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Re: Setting valve lash The setting depends on the cam, different cams will have different valve clearances. You need to use the setting for the cam you are using.
The adjustment screw is held by tension and if it the tension is not correct they will move! One thing that will loosen them up is moving the screw around, so it should only be moved as required to adjust the clearance. It should be fairly difficult to move. Moving the adjuster in or out is not an issue, excess adjusting is. There are ways to tighten up loose adjuster threads if required. Not sure how you are going to set them outside of the engine. If you get the first set of lifters adjusted, then you set the other lifters to that height, but that is still just a starting point. The final adjustment will have to be in the block and will require a couple of rechecks. |
Re: Setting valve lash Search my thread from a year or two ago called 'Light in the Lifters'. There was a lot of good info added by experienced barners. I showed a quasi-scientific method to check if the lifter's thread was tight enough to hold in service, aided by guys way smarter than me. EDIT: 'Loose in the lifters'
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