Outer Limits 4x4 Board

Thanks guys, will go a head and put it all back together. I wish I still had my spare input shaft (dunno where it is, can't find it) so I could use it to line up the clutch, best thing to do it with.....

Well I turned up the boost and fuel slightly, and the old clutch said I am not playing the game. So at 1800rpm it slips if more that 1/3 throttle is used. So, I have a replacement clutch (extreme outback, which appears to be an exedy as the disc has an exedy part no. on it) Have fitted it, but on ...

As BadMav said, it does sound like an air leak. try blocking some of the air intake on the air cleaner (if you can) and see if the revs drop, then try blocking it completely, if it still runs you have an air leak. Maybe be needle and seat stuck, I recall the old holden single barrel stromberg ...

437K klms is starting to get up there.....

do a search, you will find a lot of controversy surrounding turbocharging the 1HZ. lots have done it and said it is fine, lots have done it and said it goes bang................


With the amount of klms you have on your truck, I would seriously consider a ...

Before buying any new bits and pieces or putting anything into your battery I have a question:

Are you running an external or internal voltage regulator?

The external ones can stuff up, can bounce around and need adjustment, which can be done by GENTLY bending an arm inside. I had this issue with ...

Not sure what clutch is currently in mine, I did an auto to manual conversion about 6 years ago, think I just used a standard 2H (not at 12HT) clutch. Mine has just recently started to shudder a bit when reversing up the driveway, should have replaced it when I rebuilt the engine a few years back ...

Brendan, what sort of clutch are you running behind your 12HT? I wound my boost up to 13PSI and turned the fuel up to match (not that high though, no black smoke at all) and now when accelerating in 3rd of 4th my clutch starts to slip... :bad-words: but it goes quite well. (rebuilt engine, 3 ...

1975 45 series will probably have drums all round, so keep the discs and the rear drums. The diff housing in a '75 FJ45 will have 8 bolts holding the backing plates on, the 60 series will have four. You can re-drill the backing plates or get a later model (47 series have them) 80? onwards housing ...

I just googled Duramax and found this.........


http://www.dieselpowermag.com/features/ ... index.html


very impressive!!!

Any more with some info? I wound up the boost and fuel on the 12HT and now the clutch is slipping in 3rd under medium/hard acceleration with no load on......

Comments from 12HT owners would be appreciated......

Oil squirters are screwed into threaded holes in the block, not sure if you could maching a 2H to suit, honestly you would be better of saving your coin and getting a 12HT.

with the alternator: shop around. I got a brand new, not rebuilt, internally regulated 80A unit with new vac pump from ...

bump........ anyone?

also, are the 2F and 3F rocker arms the same??

No throttle valve on the 12HT. There is a throttle plate that is used only to shut off air to turn the engine off, not used for any other reason.

The big question has been asked before: WHY?

the only reason you need to run a BOV on a diesel is if you are getting boost spike, usually happens on gear changes if you have a very looong... intake runner/intake system (usually combined with an intercooler)

If you are not getting boost spike ...

As asked, anyone know this info?

ahhh, yeah. No need for a blow off valve unless you have really long intake runners and intercooler........

I'm a bit far north to help in person (Cairns) but maybe via internet...

When you say you can't select gears, are you sure the clutch is not working? Can you select gears when the engine is off, but can't put it in gear when the engine is running?

Have you or someone else got underneath and ...

is it the external type? If so, I believe they can be adjusted/bent to raise or lower voltage......

I am up for a new clutch soon, just after some feedback on what people are using and what works well, what doesn't and what is value for money.

I have an 8/87 HJ61 (12HT) but interested in how major brands work in all Toyotas..........

Pedders really isn't as bad a "A Current Affair" would like you to think. What they didn't tell you was the bloke from RACQ that made all the comments the vehicles were not that bad is not even a qualified mechanic, and it was not taken for a ROADWORTHY CERTIFICATE check, just a once over by RACQ ...

P.S. Put a new TX valve in also.

Don't stuff around with second hand A/C parts, not worth the hassle. Just go and buy a new parts. Receiver dryer should be replaced each time the system is opened to air anyway, they are only around $20.00. Condenser for my 60 series was about $300.00. Seriously, if you want a good reliable a/c ...

As previously mentioned, Toyota's use a negative switching system on the headlights. That is, there is constant power to the headlights, the switch is on the negative or earth side.

Do you have a 60 or 61/62 series? that is single 7" round or dual 6x4 rectangular lights?

No, as there is no vacuum pump on a petrol alternator.

If you need an alternator, shop around as the price can vary heaps. I got a brand new internally regulated unit for 250.00.

What is wrong with yours? I have found that more often than not it is just the brushes that wear out, so new brushes ...

Marks do a speedo correction box, you need to see how much yours is out (use a gps) and they can supply one to suit. (there are 3 off the shelf units available also) Cost is around 200 bucks. Or, try a heap of different 60 speedos...... I have 285x75x16 on my 60, and speedo is near spot on, just a ...

Aha!! that's why 1HZ's crack heads, because people put holleys on them!!!!


(sorry could not resist that....)

so if you have a lean cylinder it will get hotter and the rest

Ummm, I think that is wrong, if you have a lean cylinder in a diesel it would be cooler, as more fuel make more heat, less fuel makes less heat.......

Probably should have mentioned that its an auto also, so fuel economy would drop as the A440 boxes drain a lot of power just to run them. I really cant see 100klms out of a tank happening. I drive mine reasonably conservative back and forward to work (70% 80klm zone, 10% 100kph and 20% 70 and 60kph ...

was browsing ebay today and found this add for a 12HT........

http://cgi.ebay.com.au/ws/eBayISAPI.dll?ViewItem&item=320522685012&ssPageName=ADME:X:RTQ:AU:1123

person selling states it gets approx 1000klms per 85 - 90litre tank.......

I just find that a bit hard to believe, works out to just over ...

The gearboxes are the same, but the clutches are different. Don't use a petrol clutch plate on a diesel. Use a diesel clutch.