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-   -   On a low HP engine (https://classracer.com/classforum/showthread.php?t=87118)

David Lee 04-11-2024 12:43 AM

On a low HP engine
 
should you have the block align honed?

Glenn Briglio 04-11-2024 06:36 AM

Re: On a low HP engine
 
Is the block housing bores straight and the correct size ?

David Lee 04-11-2024 07:30 AM

Re: On a low HP engine
 
Quote:

Originally Posted by Glenn Briglio (Post 695955)
Is the block housing bores straight and the correct size ?

not yet, just wanted to know what to tell the machine shop to do

Billy Nees 04-11-2024 08:53 AM

Re: On a low HP engine
 
Did you take the block apart? How did the bearings look? The crank? Did the crank spin free in the block?

richie 2 04-11-2024 09:26 AM

Re: On a low HP engine
 
aline hone straightens up the thrust bearing area...always a bummer if you find out theres an issue during assembly.

David Lee 04-11-2024 11:44 AM

Re: On a low HP engine
 
Quote:

Originally Posted by Billy Nees (Post 695957)
Did you take the block apart? How did the bearings look? The crank? Did the crank spin free in the block?

i have a bare block and a crank that is in fantastic shape from that came from another engine

Adger Smith 04-11-2024 03:00 PM

Re: On a low HP engine
 
I've seen too many variabes in factory mass production machining to say No.

I got to where I just lightly trimmed (.001-.002) the caps and dusted the main bores with the align hone on ever engine I built. It was amazing what I ran into.
If it is a SBS or BBC be sure to install the oil pump. When it is torqued it affects the rear main bore.

Mike Pearson 04-11-2024 04:07 PM

Re: On a low HP engine
 
I would have the machine shop check the main bore sizes with a dial bore gauge and straight edge to see if the block is straight and true. Somehow hen the block is line honed it causes timing chain fitment issues. You can get undersized sets to compensate for that but can be a pain. In all my years of racing I have only had one block line honed. That was after I broke a crankshaft. That block was never right after that. Ended up scrapping it.

David Lee 04-11-2024 05:28 PM

Re: On a low HP engine
 
Quote:

Originally Posted by Adger Smith (Post 695971)
I've seen too many variabes in factory mass production machining to say No.

I got to where I just lightly trimmed (.001-.002) the caps and dusted the main bores with the align hone on ever engine I built. It was amazing what I ran into.
If it is a SBS or BBC be sure to install the oil pump. When it is torqued it affects the rear main bore.


would that be true for a small block mopar?

Larry Hill 04-12-2024 07:49 AM

Re: On a low HP engine
 
Quote:

Originally Posted by richie 2 (Post 695958)
aline hone straightens up the thrust bearing area...always a bummer if you find out theres an issue during assembly.

How does the aline hone straighten the thrust area?
Thanks.


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