Vortec L31 cylinder head
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(→Rocker arm studs: add text; minor clean up) |
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==Rocker arm studs== | ==Rocker arm studs== | ||
| − | Production L31 Vortec heads come with pressed in 3/8" studs. For high performance and/or solid lifter applications, screw in studs are highly recommended. The pressed studs can be pinned, but this is a stop-gap measure that should be done only in cases where the spring pressures/engine RPM/lobe intensity will not be excessive and/or the budget is limited. Otherwise use ARP screw in studs or their equivalent. | + | Production L31 Vortec heads come with pressed in 3/8" studs. For high performance and/or solid lifter applications, screw in studs are highly recommended. The pressed studs can be pinned, but this is a stop-gap measure that should be done only in cases where the spring pressures/engine RPM/lobe intensity will not be excessive and/or the budget is limited. Otherwise use ARP screw in studs or their equivalent. If not using guide plates, non shouldered studs can be used instead of studs having shoulders and a hex for tightening (this type of stud is tightened by "double nutting"). Screw in studs having a hex may require the stud bosses to be machined shorter to compensate for the hex. |
| − | Guide plates can also be installed at this time if desired. Consider | + | ===Guide plates=== |
| − | {{Note1}}If using guide plates, non self aligning rockers need to be used. If guide plates are not used, self aligning rockers MUST be used. | + | Guide plates can also be installed at this time if desired. Consider Isky adjustable guide plates. Using guide plates will require the stud bosses to be machined shorter to compensate for the thickness of the plates and the hex on the stud. While home builders have successfully installed screw in studs without specialized equipment, unless the builder is well versed in doing this type of work, i.e. drilling straight, correctly located holes and tapping them, this is better left to a professional machinist/machine shop. At the least, a fixture to guide the drill bit and tap should be used. |
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| + | {{Note1}}If using guide plates, non self aligning rockers need to be used. If guide plates are not used, self aligning rockers MUST be used. | ||
==Exhaust valve seats== | ==Exhaust valve seats== | ||
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