3 replies to this topic

[hungdynasty]

I have a 98 JDM SPI with a MPI cylinder head. I find that SPI list 32Nm but MPI list 25Nm so which torque value should I use? Thanks in advance.

 

 

SPI

 spi rocker shaft nut.JPG   48.02K   3 downloads

 

 

MPI

 mpi rocker shaft nut.jpeg   56.55K   2 downloads

[Steve220]

First stage on everything - 25lbft
Second stage on head nuts - 50lbft.

[Spider]

I've always known the figure to be 25 ft/lb which translates in new money to 32 Nm.

 

While in the later workshop manuals and other public documents were in metric, all internal drawings I have and have seen were all in imperial, so someone had to do the conversions for the published documents. It does open another door for errors !

I'm not aware of a change of specification in these studs, though, there may have been, but I'd say, there was a typo in translation (25 ft/lb and someone missed the conversion but just used the new suffix) and the correct figure would be 32 Nm.

[hungdynasty]

Thanks all!