Camshaft install
- Thread starter Tzar177
- Start date
Should be same base cricle as stock. See the online manual for specs and measurement instructions for valve clearance, if you don't have the manual I'll send you a link,let me know.If some shims are too tight and others too loose you can swap them with each other.
That's what most people will do
Look in the shop manual for valve clearance instructions and use a feeler
gauge to check the clearances. At the top of this forum is a link to the shop manual.
I would be surprised if they do not need some adjustment. You cannot be sure the base circle is the same as stock. The cam grind (lobe lift and duration) can affect the base circle diameter if the cam grinder starts off with the same size blank. Also valve seats can wear and affect the clearances.
Clifton
Last edited:
KrayzieFox
Member
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- 01 MP3 Turbo
Maybe this isn't an install you should do by yourself..
justanothermp5
Banned
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- Rust Bucket
they bolt in yes, but the lobes have different durations/sizes or w.e and thats why they need to be shimmed
so you dont have a valve a little open when it should be closed, etc.
i dont think you should have any problems though, most people dont even check the shims lol
so you dont have a valve a little open when it should be closed, etc.
i dont think you should have any problems though, most people dont even check the shims lol
FWIW, checking the valve clearance is really easy even if you've never done it before. All you need is a set of feeler gauges (costs less than $10). You just rotate the crank so that each cylinder in turn is at TDC with both valves completely closed, and then use the gauges to determine how much space is between the cam lobe and the lifter face for that cylinder. FYI the shop manual specifies .0089-.0116"
If you take measurements from all 16 valves and post them up, I'm sure someone here can give you some pointers on how to go about switching around or replacing shims.
If you take measurements from all 16 valves and post them up, I'm sure someone here can give you some pointers on how to go about switching around or replacing shims.
All you need to do to measure clearances is pull off the valve cover again. Worst case, you're out a $30 gasket. And yeah, they will be hard to rotate since at least one lobe is compressing a spring.
But, I would say that if you don't have any excessive noise coming from the valvetrain you're probably okay without reshimming them.
But, I would say that if you don't have any excessive noise coming from the valvetrain you're probably okay without reshimming them.
Stock cams should rotate easily, aggressive cams will click when the lobes hit the lifters, but still move easily.
either place, or harbor freight get .15mm minimum on the blade set.
