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Joined: Jan 2010
Posts: 349
Contributor
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OP
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Joined: Jan 2010
Posts: 349 |
Hello all!
I had a knock in a 250 from a previous car. I pulled the engine and put it aside.
I drug it out a couple of weeks ago so I could yet it apart for my turbo build.
It's a 250 blue block?
Anyway, there is some concerning bearing wear..,
#1 main on the engine side is worn through to the copper (brass?)
#5 rod on the rod not the cap is worn the same.
As far as measurements go... Everything measures up with pretty tight tolerances. I think there was not more than .002" difference anywhere.
This was a great running engine until this slight knock started.
I'm wondering if I throw a set of bearing at it and jam it in the car? I certainly don't have money for anything more at this time.
Best I can tell, this engine had never been apart. Meaning it ran for 80,000 without thus bearing noise. I ran it for over a year before it started.
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Joined: May 2000
Posts: 1,464
1000 Post Club
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1000 Post Club
Joined: May 2000
Posts: 1,464 |
How do the crank journals look? I would polish them with crocus cloth before installing new inserts. Good luck
FORD 300 inline six - THE BEST KEPT SECRET IN DRAG RACING!
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Joined: Jan 2010
Posts: 349
Contributor
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OP
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Joined: Jan 2010
Posts: 349 |
Everything looks ok. Just the wear on those two bearings.
I'm thinking new bearings. Hone and new rings. Slam it in. Hit it with 10 lbs. see where I'm at.
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Joined: May 2016
Posts: 468 Likes: 4
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Joined: May 2016
Posts: 468 Likes: 4 |
Why not have the crank turned and check the rod big ends for out of round? It would be great insurance!!
Also check the pistons VERY closely! A barrel shaped piston can give you that "Little knock".
After that you'll be able to install the engine with MUCH more confidence!!
Never use a minor caliber bullet on a major caliber adversary
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Joined: Jan 2010
Posts: 349
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OP
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Joined: Jan 2010
Posts: 349 |
The hopes and dreams were that I could put the bottom end bearings in and put it in the car. The more I look at it. The more work it needs.
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Joined: Sep 2008
Posts: 3,669 Likes: 42
1000 Post Club
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1000 Post Club
Joined: Sep 2008
Posts: 3,669 Likes: 42 |
Often reality makes dreams go away as quickly as they come to you unfortunately.
Class III CNC Machinist/Programmer
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Joined: Jan 2010
Posts: 349
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OP
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Joined: Jan 2010
Posts: 349 |
Tell me about it!I am going to call the machine shop tomorrow to get a price on redoing the short block. Sadly, I cannot afford the forged Pistons at this time!
I will use the head as is and deal with it when money allows.
The shop I use was owned by a very knowledgable guy... Especially when it comes to our beloved inlines! He runs a drag car called The Pepper Mill.
Fingers crossed I can afford it!
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