Volvo RWD 140-160 Forum

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con rod bearings reference on 8-bolt crank 140-160 1974

posted by  SebCH on  Sat Apr 30 11:09 CST 2005
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last visit: Fri Feb 19 06:25 CST 2010
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Hi all,

Bad surprise this afternoon while cleaning and inspecting the parts of my soon to be reassembled engine: a totally shot con rod bearing was revealed.

The engine is a K-jetted B20E, 8-bolt crank, probably from 74. The rod bearings have the number 463094 on them, but I couldn't find any reference to it on the web.

Can anyone give info on this part? I'd like to know what I'll be looking for in the next days: is this standart or oversized? Will this fit any B20, i.e. are the con rod (and main) journals the same size on the 8-bolt than on the 6-bolt cranks? I believe not but all the parts supplier list only one ref for all B20's, so will these fit my crank??

If they are different, can anyone provide the doameter of the journals of the 8-bolt and 6-bolts so I can check if my crank needs machining?

Any hint mostly welcome, I'm stuck in my rebuild!

Thanks in advance to you B20 gurus!!! Séb








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    con rod bearings reference on 8-bolt crank 140-160 1974

    posted by  Amazonet on  Sat Apr 30 14:04 CST 2005
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    last visit: Fri Jul 3 11:35 CST 2009
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    Hello SébCH,

    Here is the OEM dimentions for B20 crankjournals.

    Rod: version 1 version 2 version 3 (74-)
    Std 54,089-54,102mm 54,099-54,112mm 53,987-54,000mm
    0,010" 53,835-53,848mm 53,845-53,858mm 53,733-53,746mm
    0,020" 53,581-53,594mm 53,591-53,604mm 53,479-53,492mm

    Main:
    Std 63,441-63,454mm 63,451-63,464mm
    0,010" 63,187-63,200mm 63,197-63,210mm
    0,020" 62,933-62,946mm 62,943-62,956mm

    BR,Amazonet.








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    con rod bearings reference on 8-bolt crank 140-160 1974

    posted by  Phil S. on  Sat Apr 30 11:35 CST 2005
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    last visit: Fri Oct 24 13:18 CST 2014
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    Rod bearings are different on the 8-bolt cranks -- they are the same as for B21 and B23 (not B230).

    The outside of your old bearing shells should be stamped STD or with a numerical undersize dimension. I only have part numbers for bearing kits, not individual shells. Those are (for your crank):

    271063 = standard
    271064 = .010" under
    271065 = .020" under

    Don't know what the actual crank journal measurement is, sorry...







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