How much play should valve guides have?

A general rule of thumb is that intake guides need guide-to-stem clearance of . 001″ to . 003″ and exhaust guides need from . 002″ to .

Can I replace valve guides?

We’ve talked a lot in the past about resizing valve guides, replacing valve guides, knurling valve guides, etc., but we’ve rarely touched on how to get the little buggers out of the head. It’s actually pretty simple. You can ream them out; you can drill them out; you can drive them out.

Will bad valve guides cause low compression?

What is this? A compression test on a vehicle with a bad valve guide seal may show unusually high compression – if you see low compression along with these other symptoms, it may be a bad piston ring or a leaky head gasket instead.

Will bad valve guides cause smoke?

In a faulty valve seal situation, when you begin to accelerate again, this oil can end up getting sucked past the seal an into the valve guide. This causes more of this blueish smoke, due to the burning of oil, to come out the tailpipe.

What types of valves are available for the a series?

Explore our comprehensive selection of valves and valve seats for all A Series and A+ Classic Mini engines. We stock a full range of standard valves for Mini 850, Mini 998, Mini 1100, Mini 1275, Mini SPi and Mini MPi applications. For modified cylinder heads we also have competition valves and Rimflow valves in a variety of sizes.

What types of valves are available for the Mini 850?

We stock a full range of standard valves for Mini 850, Mini 998, Mini 1100, Mini 1275, Mini SPi and Mini MPi applications. For modified cylinder heads we also have competition valves and Rimflow valves in a variety of sizes.

What parts do I need to recondition a classic mini cylinder head?

Just part of Mini Sports huge range of components for reconditioning or modifying a Classic Mini cylinder head including valve guides , valve springs, head gaskets, alloy roller tip rockers, standard rocker parts, rocker covers and cylinder head bolts and studs.

What is a valve guide?

Valve guides are manufactured with specified tolerances and can be installed directly into the cylinder head guide bore without additional work. Considering requirements of emission control engines, this presents unique challenges in repairing today’s cylinder head.