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TR4/4A Is this Camshaft OK?

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KVH

KVH

Obi Wan
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The steel on this camshaft looks fine to me. The lobes and smooth, and no nicks or flat spots are visible.

However, the wear must be a bit odd, as each lobe has a shiny steel portion and a well tarnished portion.

Here are some pics. Is this Camshaft OK? thx

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  • Camsahft Tarnish 3.JPG
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  • Camshaft Showing Tarnish.JPG
    Camshaft Showing Tarnish.JPG
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KVH, Keeping it on a flat surface and measure the height of the lobs. The front ones ware more than the rear, if there is one or two that are .010 out, a regrind or new one could be in your future. There will be a difference between intake and exhaust.

Wayne
 
From what I can tell it looks like the original coating is partially there along with the polished areas which is normal. As Wayne said I would measure each lobe and check it against the original specs. How was the engine running before dissassembly? Did you have to make frequent valve adjustments or did they stay pretty consistent?
Rut
 
Just curious; what do the lifters look like? Tom
 
The lifters look perfect. Like new. Valves were good and needed no adjustments. I'll measure the cam but I'm guessing the heights are nearly the same. Thanks guys.
 
IMHO....If the engine is disassembled, I would have the cam bearings remetalled and line bored, plus have the camshaft ground to a more sporty profile, lifters resurfaced.
 
Why??
New cam bearing inserts are readily available and cheap; especially when compared to the cost of having the block line-bored.

But from the look of things (and descriptions in other posts), even that is probably not needed. There's no sense in spending a lot of money replacing something that is still within spec.

Or as my grandfather explained it to me "If it ain't broke, don't fix it."
 
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