Isuzu G-series Twin Cam

i've had a g180 twin for a few years & i want to rebuild it.can anyone help me on info on workshop manuals or spec,s & supplier of parts.ive tried for a few year to find info but failed & its driving me nuts.HELP

I have a bit of info regarding the G200W but it's all in Japanese. Parts, well, there is a fair bit of info on that through the forum. Keep in mind the G series twin cam engines were never released in Australia so expect that parts won't be readily available over the counter. None of the parts books even list a twin cam engine! Best bet would be to keep a watch on eBay because stuff does pop up from time to time. The G200W engines did see service in New Zealand in the earlier model Piazza.

baldynugget wrote:i've had a g180 twin for a few years & i want to rebuild it.can anyone help me on info on workshop manuals or spec,s & supplier of parts.ive tried for a few year to find info but failed & its driving me nuts.HELP

what info are you looking for? post up what you need and im pretty sure somebody would know something

i'm mainly after spec's on head tensions,cam cap tension & if possible an idea on timing chain positions.cheers.

for the head torque I would be trying to same torque as a g200
although i am not sure thats the best i could believe it to be unless any other members have any thoughts

timing chain positions try doing a search im pretty sure theres a picture of it somewhere in here

also another thought for finding out head torques etc try getting a torque wrench on the existing item and just go up from XX knm up every 5 knm and see when it actually starts to turn and that will be a bit of problem solving
if that made any sense

Bottom end bearings, both crank and rod on both G180w and G200w are the same as G200z. I beleive the piston rings may also be interchangeable.

Will save you the search, here's the thread on timing the cams:

http://poida.x10hosting.com/twincam/viewtopic.php?t=8

As for the cam cap tensions, I'm interested too...