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Hello, I am rebuilding an rb26 that spun an oil pump. It sceased the exhaust cam journal. Other than that, it's in great condition. Can I line bore the head and just use it, or do i need to go shopping for a new one? Do they make a bearing that can be fitted in a cam tunnel?
 

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Well, it depends on the damage that has been done. You can line bore it without any problem, but you need a good machinist!, line bore every cap individually. If the machinist can do it properly, you won't need any bearings. If says he needs to do it, better stay off from a bearing and the machinist ;), because that's not really the right way how to do it. But as i already said, it depends on the damage that has been done, we're talking about a few hundreds.

I'd recommend a new head instead of using a damaged one.
 

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Never heard of a bearing for that. New Heads aren't that expensive from Nissan. You could get a good used Head for the money you would be spending on the old screwed one.

Marc
 

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I inline bored my cam journals without any issues. Cost £150.
 

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Thats quite cheap, how much did they took out?

@WvdB
How can you call boring each individual cap "line boring"? :p

Marc
 

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@ Marc; Haha, yeah you're right. I was not very clear in that part :chairshot. I wanted to make clear that each cap will be bored, so not only the damaged one!

So as Stachi said, better buy a new one instead putting the money in fixing the old one.
 
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