AJP camshaft wear
Discussion
not done one for years but around 10+years ago I had one much worse.
I couldn't source one at the time as the early style clatter cams were discontinued. I was able to get a local machine shop to reprofile and reharden.
hard to say how much time you have but you have to think that it is producing metal fileings that can't be good for your engine.
I couldn't source one at the time as the early style clatter cams were discontinued. I was able to get a local machine shop to reprofile and reharden.
hard to say how much time you have but you have to think that it is producing metal fileings that can't be good for your engine.
What were the valve clearances?
The tappets are softer that the cam shafts, so if the tappets are not dished it's likely that the cam shafts have been like that for some time and the tappets have been replaced
What oil have you been using?
High ZDDP is critical in flat tappet engines, especially ones with aggressive cam profiles like the AJP8
The tappets are softer that the cam shafts, so if the tappets are not dished it's likely that the cam shafts have been like that for some time and the tappets have been replaced
What oil have you been using?
High ZDDP is critical in flat tappet engines, especially ones with aggressive cam profiles like the AJP8
ukkid35 said:
What were the valve clearances?
The tappets are softer that the cam shafts, so if the tappets are not dished it's likely that the cam shafts have been like that for some time and the tappets have been replaced
What oil have you been using?
High ZDDP is critical in flat tappet engines, especially ones with aggressive cam profiles like the AJP8
All intake clearances were .008 - .009The tappets are softer that the cam shafts, so if the tappets are not dished it's likely that the cam shafts have been like that for some time and the tappets have been replaced
What oil have you been using?
High ZDDP is critical in flat tappet engines, especially ones with aggressive cam profiles like the AJP8
I have owned the car for twelve years and checked clearances three times, this is the first time I noticed any wear on camshaft.
All that time I have used Castrol Edge 5w-40 oil. When I noticed the wear I also thought that maybe I should have been using something else..
So the clearances are perfect, but you now have lobe wear that was not there previously
I can't see how this could be anything other than lubrication, unless perhaps the engine was not allowed to warm up sufficiently?
A friend of mine used Castrol Edge in his Chimaera, and the cam shaft was destroyed
So my money is on the oil
I doesn't look bad though, not enough to affect performance, so I would just monitor it for now
It's not like new cam shafts are easily available
I guess you could get them reprofiled, but I know nothing about that
Are there any marking on the lifter faces?
My badly neglected engine had dished lifters when I bought it, but the cam lobes were fine
I can't see how this could be anything other than lubrication, unless perhaps the engine was not allowed to warm up sufficiently?
A friend of mine used Castrol Edge in his Chimaera, and the cam shaft was destroyed
So my money is on the oil
I doesn't look bad though, not enough to affect performance, so I would just monitor it for now
It's not like new cam shafts are easily available
I guess you could get them reprofiled, but I know nothing about that
Are there any marking on the lifter faces?
My badly neglected engine had dished lifters when I bought it, but the cam lobes were fine
Edited by ukkid35 on Wednesday 13th March 11:18
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