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Discussion Starter #1
Hey guys i got a jdm 5mge and i took it apart to re-ring and put fresh bearings in it. Ran into a huge problem because the rods in the motor have the bearing tangs and oil ports in different locations than the US bearings :mad:
I work as a mechanic at Toyota dealership and when we looked up the parts number i noticed that Toyota 5M and 7M motor share the same part numbers for rod bearing.

1) Can i use a 7m rod with a 5m piston? Are they same length? Compression change?

2) Can i use a 7m rod with a 7mge piston? compression change?

3) Can i use a 7m rod with a 7mgte piston? compression?

Thanks
please only reply if u know for sure
 

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5M rods are longer than 7M rods, so they are a no go. Are you sure you have the right bearing inserts? All the main and rod bearings are the same between 5, 6, & 7M motors.
 

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I dunno man, when I took my 84 apart this weekend, it had some odd bearings in it, some would just not fit correctly into my 85 rod caps, also I noticed 2 oil port holes instead of just one. Maybe I just happen to get stuck w/ the oddities :whutthef:
 

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Discussion Starter #4
TanyasMk2Blackpra said:
I dunno man, when I took my 84 apart this weekend, it had some odd bearings in it, some would just not fit correctly into my 85 rod caps, also I noticed 2 oil port holes instead of just one. Maybe I just happen to get stuck w/ the oddities :whutthef:
BINGO same problem and u cannot find a bearing to fit those rods :mad:
 

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Look on the back of the inserts and see if they have "fm" stamped on them with a number. If so, those double-holed wonders were made by Federal-Mogul. A good quality bearing actually, though sometimes they aren't manufactured quite to proper specs.. I found the same dilemma in a DSM engine that had been rebuilt with Federal-Mogul bearings. You might try and see if a set of Clevite 77 inserts are available for the M-series engines with a TRW part number.
 

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2) Can i use a 7m rod with a 7mge piston? compression change?

3) Can i use a 7m rod with a 7mgte piston? compression?

The 7mge piston has 4 valve relief cut into it, you can relief them for 2 valves but why??

The 7mgte piston is dished concave = lower compression and not exactly sure on the pin height 5mge vs 7m pistons but doesnt matter anyway

The last set of 5M pistons I bought cost me $150 for .050mm overs.
 
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