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SN95 Cobras
lash adjusters
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<blockquote data-quote="Happster" data-source="post: 16248998" data-attributes="member: 76076"><p>Late to the thread, but for those still finding this thread, lash adjusters couldn't be easier. When the flat of the cam is on the rocker, the rockers come out easily with a screwdriver, as was mentioned. Then the lash adjusters come out by hand. Soak the new ones in oil to fill them. They need oil in them for the hydraulics to work. Someone mentioned testing them - full of oil they should take a vice to depress (gently!) and the time it takes is the measure of whether they are good or bad. I forget the spec...10 seconds I think. If you can depress them without a vice, toss them. As for the noise, these heads are always noisy. Some early iterations of the heads pre-2004 have coolant flow issues on the driver's side rear head, cylinders 6-8. That creates noise and pinging too. Make sure it is not that. Late 03 and 04 heads forward (Cobra, Mach, Aviator use them, castings end in DB and DC and they have 9 thread plug holes) have better flow, but still not ideal. There is a nice mod for that - pop the rear freeze plug off the driver's side head and the coolant tube on the passenger head and the mod is a bolt in coolant bridge that acts not so differently from the front coolant bridge. It allows flow from the rear of the driver's side head to the heater core, just like the passenger side already has by design. Problem solved.</p></blockquote><p></p>
[QUOTE="Happster, post: 16248998, member: 76076"] Late to the thread, but for those still finding this thread, lash adjusters couldn't be easier. When the flat of the cam is on the rocker, the rockers come out easily with a screwdriver, as was mentioned. Then the lash adjusters come out by hand. Soak the new ones in oil to fill them. They need oil in them for the hydraulics to work. Someone mentioned testing them - full of oil they should take a vice to depress (gently!) and the time it takes is the measure of whether they are good or bad. I forget the spec...10 seconds I think. If you can depress them without a vice, toss them. As for the noise, these heads are always noisy. Some early iterations of the heads pre-2004 have coolant flow issues on the driver's side rear head, cylinders 6-8. That creates noise and pinging too. Make sure it is not that. Late 03 and 04 heads forward (Cobra, Mach, Aviator use them, castings end in DB and DC and they have 9 thread plug holes) have better flow, but still not ideal. There is a nice mod for that - pop the rear freeze plug off the driver's side head and the coolant tube on the passenger head and the mod is a bolt in coolant bridge that acts not so differently from the front coolant bridge. It allows flow from the rear of the driver's side head to the heater core, just like the passenger side already has by design. Problem solved. [/QUOTE]
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