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Old 04-04-2018, 01:54 AM   #51
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gawd i hate being the bearer of bad news, new bearings will probably last a few minutes if that long, they need a smooth ride. Throwing new bearings at a bad crank never works well. pull it and get it turned.And if a crank has a ground bearing , its done, might be repairable ....... it is never trust worthy again tho. (till ya get it fixed)
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Old 04-04-2018, 02:11 AM   #52
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Its just an experiment at this point im dealing with some "global issues" and these things are incidental.
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Old 04-04-2018, 09:17 AM   #53
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Quote:
Originally Posted by johnber View Post
gawd i hate being the bearer of bad news, new bearings will probably last a few minutes if that long, they need a smooth ride. Throwing new bearings at a bad crank never works well. pull it and get it turned.And if a crank has a ground bearing , its done, might be repairable ....... it is never trust worthy again tho. (till ya get it fixed)
Maybe. Those forged cranks are pretty tough. Better than a cast crank any day of the week.

Have to turn the crank manually and inspect for scoring or damage. You will need Plastigage or something similar to install the bearing, though. Next time, don't disable the rev limiter and don't try to run it up to 6,500 rpms. I would advise Lucas treatment and a high-quality oil change to boot. And go easy on the engine for a bit after you do. No more blowing up your motor like that.
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Old 04-04-2018, 01:48 PM   #54
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I think that's good advice I'm going to buff the journal with crocus cloth but it looks good. I'm also going to use Plastigage from there I will know where I'm at.
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Old 04-10-2018, 11:30 PM   #55
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Well Im glad that I spun that con rod bearing, all the bearings were shot. I have replaced all the bearings con rod and mains. Next is the fuel pump.

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Old 04-16-2018, 06:37 PM   #56
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Everything went well with replacement of the bearings, but I had to take it 6000rpm. Well she stating knocking after that.

I am determined to get what I want. I've ordered the best con rod bearings that are available.

I found another engine for $300 locally.

I am going to put H beam forged rods in it. I'm going to go for a full rebuild.
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Old 04-16-2018, 07:07 PM   #57
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Originally Posted by jeremyd21 View Post
Everything went well with replacement of the bearings, but I had to take it 6000rpm. Well she stating knocking after that.

I am determined to get what I want. I've ordered the best con rod bearings that are available.

I found another engine for $300 locally.

I am going to put H beam forged rods in it. I'm going to go for a full rebuild.
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Old 04-16-2018, 07:33 PM   #58
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Ive done my share of sophisticated work I have 3 patents on high pressure injection valves.

I all my years rebuilding engines especially 4 cyl I easily go to 7000rpm. But not this Nissan is only rated to 4500rpm and I hate it.
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Old 04-16-2018, 07:35 PM   #59
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I find it entertaining, Jeremy. You aren't bothering me.

I'm just here for the show.
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Old 04-16-2018, 07:59 PM   #60
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Thanks jp2code,

All the engines I've ever rebuilt I have never encountered such a low rev line 4500rpm . Funny the forged con rods are rated for 900hp.

Im going to beat this no matter how much money I have to throw at it.

And I welcome all or any comments...
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