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an Oil question 10w-60

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Doc. View Drop Down
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Doc. Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 16:38
Originally posted by Brian UK Brian UK wrote:

. . . Add to that poor case hardening on the first issue followers which were the ones which almost invariably failed in a short time . . . 
Did those early followers use the DLC coating?
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Post Options Post Options   Thanks (0) Thanks(0)   Quote little750 Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 16:45
Not sure but I don't think so.
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Post Options Post Options   Thanks (0) Thanks(0)   Quote Mike H Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 17:50
Originally posted by Brian UK Brian UK wrote:

I'm personally convinced that it's the additional spring pressure on the 4 valve heads that mainly caused the problem. Add to that poor case hardening on the first issue followers which were the ones which almost invariably failed in a short time.


That's my understanding too.

@ Cyclobutch yes that's it.

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Post Options Post Options   Thanks (0) Thanks(0)   Quote Brian UK Quote  Post ReplyReply Direct Link To This Post Posted: 14 Jan 2016 at 17:55
Originally posted by Doc. Doc. wrote:

Originally posted by Brian UK Brian UK wrote:

. . . Add to that poor case hardening on the first issue followers which were the ones which almost invariably failed in a short time . . . 
Did those early followers use the DLC coating?
No idea, but I do know a pair were hardness tested by a reputable company and fell well short of the figures they should have been. The mark 2 type were definitely harder and the mark 3 were a slightly different design/profile.
Brian.

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