View topic - crank bearing swap

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 Post subject: Re: crank bearing swap
PostPosted: Sun Aug 23, 2020 9:48 am 
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Joined: Tue Jan 15, 2019 7:31 am
Posts: 94
Location: Southern New Hampshire
No its the depot hack.


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 Post subject: Re: crank bearing swap
PostPosted: Sun Aug 23, 2020 11:34 am 
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Joined: Thu Mar 05, 2020 1:56 pm
Posts: 50
OK, that's the vehicle I thought. I met the owner before you his last trip to Hershey. Quite impressive car, won't find too many others IF any.


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 Post subject: Re: crank bearing swap
PostPosted: Fri Aug 28, 2020 8:43 pm 
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Joined: Wed May 27, 2020 4:56 am
Posts: 43
Location: maine
Does the oil pump show wear and/or are the clearances within limits?


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 Post subject: Re: crank bearing swap
PostPosted: Fri Aug 28, 2020 10:29 pm 
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Joined: Tue Jan 15, 2019 7:31 am
Posts: 94
Location: Southern New Hampshire
Oil pump was rebuilt


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 Post subject: Re: crank bearing swap
PostPosted: Sat Aug 29, 2020 12:35 am 
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Joined: Thu Mar 21, 2013 7:06 pm
Posts: 111
Sounds as if you've tried everything except a cylinder leak down test.

I'd try that next if it was my truck. Unfortunately, this could yield bad news so brace yourself. IF pressure loss is due to an internal leak of any kind, it won't be good news but at least you'll have a more precise answer of why it's loosing pressure and what the resolution should be.

If you're thinking of rebuilding it anyway, you may not want to risk further damage (in my opinion) and rebuild properly when you can afford it.


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 Post subject: Re: crank bearing swap
PostPosted: Sat Aug 29, 2020 8:16 am 
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Joined: Tue Jan 15, 2019 7:31 am
Posts: 94
Location: Southern New Hampshire
Thanks David, I am getting to the point as you said just do it right before I get some serious damage. It was talking with someone just yesterday woh suggested the same
So I will do that next but probably just bite the bullet and get it rebuilt.

Thanks for all the great help.


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 Post subject: Re: crank bearing swap
PostPosted: Sat Aug 29, 2020 8:36 am 
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Joined: Wed May 27, 2020 4:56 am
Posts: 43
Location: maine
Check the bearing clearances with Plastigage. If the clearances are okay the bearings are not the problem. Check the end play too.


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 Post subject: Re: crank bearing swap
PostPosted: Mon Aug 31, 2020 7:27 am 
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Joined: Tue Jan 15, 2019 7:31 am
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Location: Southern New Hampshire
If I don't do the full rebuild that will be something I do. But I am leaning to a full rebuild.
Thanks


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 Post subject: Re: crank bearing swap
PostPosted: Mon Aug 31, 2020 10:56 am 
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Joined: Wed May 27, 2020 4:56 am
Posts: 43
Location: maine
A rebuilt engine is a wonderful thing and should cure your woes.
Whether i's a repair or rebuild, it would be wise to find the cause while the engine is assembled. If the bearings look okay and are within tolerance I suggest you keep looking until you find an explanation.
I've never been inside one of those engines so I can't offer any DB specific details.
Unless there are oil distribution lines with threaded connections inside the engine, an internal leak seems unlikely. If there are restricted fittings to spray oil on the gears or?, make sure those haven't been monkeyed with. Worn camshaft bearings could/would cause low oil pressure. Sloppy lifters are unlikely but worth ruling out.
Good luck.
Nat


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