For the love of a tractor engine: The life and times of the 18R-G

[hosking1991]

nothing stamped on there so i presume these are 8.7's

[airfireman1]

They are not 9.7s as they are stamped on the top, a stated earlier, so they must be the lower comp ones, 18rgu? 18rgeu?
They look very rusty in the ring grooves. I see a full rebuild happening here.

[hosking1991]

wierd it has/had a 230 head on it must of had a interesting life
and yes im slowley saving money for the rebuild but i got it cheap as chips
so you really do get what you pay for

+rep all round

[timbosaurus]

Yeah, unfortunately they dont look like 9.7's

I took some pics for you to compare. This is comparing my 9.7's with my 8.somethings.





Apart from the dome and the stamping, I can't see any other obvious differences

[timbosaurus]

oh, what orientation is the engine number. They way the old dizzy hole has been blocked up, makes me think this is a bitsa engine made from an 18RC block.

[hosking1991]

oh, what orientation is the engine number. They way the old dizzy hole has been blocked up, makes me think this is a bitsa engine made from an 18RC block.

im pretty sure its a 18rg block its got the upsidedown engine number
cheers for the piston pics +rep

[ra_28]

All the 18rg blocks i've had have got the plug in the dizzy hole. The way I could tell is that the dip stick had been move to the other side.

Cheers
Alex

[Steve M]

Have a look inside the piston skirt.
88251 = 8.7:1
88270 = 8.3:1

Either way, that's and 18R-C/18RGEU rod, so I'd be guessing 8.3:1 or a rod swap has been done.

[o_man_ra23]

That dizzy plug looks right... dont forget it has the oil pump drive gear in it... its not just a block off plate. Steve, I didnt know the 18R-GUE had the same rods as the 18R-C... interesting

[timbosaurus]

Oh, that dizzy cover is factory? very homemade lookin'

Steve, ur right. The 9.7's above have 88252 and the 8.x's have 88251. They must be 8.7's.

[tricky]

Oh, that dizzy cover is factory? very homemade lookin'

Yeah, it looks less stock than my stock one Perhaps they did a couple of different styles over the years.

[Ren_RG28]

Hey Guys,

Finally uploaded some pics of the 18RG toady. Back from the machine shop all balanced and ready for assembly. Check them out on my rebuild thread.

Cheers,
Ren.

[hosking1991]

Have a look inside the piston skirt.
88251 = 8.7:1
88270 = 8.3:1

Either way, that's and 18R-C/18RGEU rod, so I'd be guessing 8.3:1 or a rod swap has been done.

casting reads 88270 as i said before this has had a interesting life

rep to all

[o_man_ra23]

Probably 8.3 then mate... but you have the good head at least.

[hosking1991]

Probably 8.3 then mate... but you have the good head at least.

do you reckon it'll go well with the 8.3 pistons and yes aslong as i have the 230 cams im happy