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HQ_SS_Andy Offline
#1 Posted : Sunday, 31 July 2022 3:52:50 PM(UTC)
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The conrod bearings on the 253 I'm rebuilding are stamped:

Holden
R5J RM50U

Does anyone know if these are standard or oversize ?
Rgds.
HK1837 Offline
#2 Posted : Monday, 1 August 2022 9:42:00 AM(UTC)
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They should have a 3 digit number on them if they are under size, like 001, 010, 020 etc. I reckon they will be STD. A simple measure of the journal will tell.
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HQ_SS_Andy on 3/08/2022(UTC)
HQ_SS_Andy Offline
#3 Posted : Tuesday, 2 August 2022 6:58:16 PM(UTC)
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Thanks HK. No 3 digit numbers on them. I suspect they are standard.
Pistons are standard.
I would measure the journal but cannot find a spec in the manual. Any idea what it should be ?
Rgds.
Smitty2 Offline
#4 Posted : Tuesday, 2 August 2022 9:32:16 PM(UTC)
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Originally Posted by: HQ_SS_Andy Go to Quoted Post
Thanks HK. No 3 digit numbers on them. I suspect they are standard.
Pistons are standard.
I would measure the journal but cannot find a spec in the manual. Any idea what it should be ?
Rgds.




my Holden engine manual says -
Connecting rod

journal diameter 2.124 - 2.125"
out of round .005" MAX
Bearing clearance .0007 - .0022"


HTH
Club circuit racing...the best fun you can have with your pants on
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HQ_SS_Andy on 3/08/2022(UTC)
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