Thread: 25 PSI boost on 300Tdi

Don't worry Rick,LC's crack the hangers,around the steering box and the rear crossmember too not to mention the doors constantly falling off,regardless of what people believe all makes have their drama's. Pat

Originally Posted by rick130

Interesting, but i thought all the chassis problems were long gone ?
How old was the study ?

The leafer rears would snap the spring hanger off, and the coil cabs would break the chassis rail off behind the rear axle when heavily/overloaded (as in spray contractor use)

We must have got a goodun, we've had far less (as in none, other than the overheating) problems compared to everyone we know with LC's around here.

Study was about 7 year ago, when I had a few mates working in the local dealers, chassis have trouble, 2 people my old boy tour with, with GU patrols, wagons, one recently died, both have had broken spring hangers, more than one and one had a broken chassis, complete shear on one side, not use and abuse types either, but normally loaded for touring stuff......oh and long range fuel tanks, don't start on them

Originally Posted by PAT303

,regardless of what people believe all makes have their drama's. Pat

Very true Pat

Originally Posted by rovercare

Study was about 7 year ago, when I had a few mates working in the local dealers, chassis have trouble,
[snip]

Yep, that makes sense.

Telstra were killing them quicker than the mines
Nissan were pretty quick to beef things up.
It was around that time they went to the upgraded tie rod and drag link too.

Our spray contractor snapped both rear rails right off behind the axle in his GU coil cab around then.
When he offloaded it through the auction, there were half a dozen there that had been broken in exactly the same manner.

It was around that time that Toyota had a heap of problems with transmissions, everyone, whether LC or Hilux seemed to end up with a new gearbox or TC.

Originally Posted by rick130

Yep, that makes sense.

Telstra were killing them quicker than the mines
Nissan were pretty quick to beef things up.
It was around that time they went to the upgraded tie rod and drag link too.

Our spray contractor snapped both rear rails right off behind the axle in his GU coil cab around then.
When he offloaded it through the auction, there were half a dozen there that had been broken in exactly the same manner.

It was around that time that Toyota had a heap of problems with transmissions, everyone, whether LC or Hilux seemed to end up with a new gearbox or TC.

N/A 1HZ 78/9's had lots of issues with the mainshaft between the box and transer, 1HDT/FTE had a different box

The comparison between Nissan and Tojo, was prior to lots of chassis issues I know, these have been fore recent, but on early 2000ish GU's

The reason why so many problems were had with bits breaking really comes down to serious overloading,the telstra vehicles were loaded so heavy that very stiff springs were needed to keep them up,the springs were so stiff that the tyres started splitting sidewalls so even stiffer ones were fitted and the vehicles had no suspension as such and the shock went straight to the chassis,the Merc and Transit cab overs are getting used more now and don't suffer from it as they are designed for it.The R155 box tojo used were never any good,they started as a good four speed then had fifth shoved in the back in an extended housing that got no oil and the transfer input gear ran dry also as they don't use an oil thrower to get oil to it so it sheared the splines like the first R380's,we used to fit Macnamara output gears that had a boss as long as the OME gear and PTO spacer so gave a longer spline engagement.From memory the 1HDT engine came out in the 80 series and it was a terrible motor,it suffered so many warranty replacements tojo stopped selling them. Pat

Originally Posted by B92 8NW

I had a spare few minutes today to start installing the hardware... correct my procedure if it's wrong but I've already got the intercooler in, I was going to increase the boost to 18 PSI first, monitor the EGTs for a few weeks to get a feel for how much extra fuel I can add, then turn up the fuelling. I've spoken to a good Bosch agent in Melbourne who tweaked my 200Tdi Disco and they've advised to leave the boost compensator adjustments alone, and only adjust the bolt at the back on the end where all the pipes emerge (or let them do it!!!).

First major problem is reaching the actuator rod, crap compared to a 200Tdi. I'm thinking about removing the whole manifold and setting it with compressed air, or getting a turbo shop to check it over and set it for me. They can do this on the bench?

Input welcomed please

Bike pump and pressure gauge works great for checking wastegate function and settings.

Originally Posted by PAT303

The reason why so many problems were had with bits breaking really comes down to serious overloading,the telstra vehicles were loaded so heavy that very stiff springs were needed to keep them up,the springs were so stiff that the tyres started splitting sidewalls so even stiffer ones were fitted and the vehicles had no suspension as such and the shock went straight to the chassis,the Merc and Transit cab overs are getting used more now and don't suffer from it as they are designed for it.The R155 box tojo used were never any good,they started as a good four speed then had fifth shoved in the back in an extended housing that got no oil and the transfer input gear ran dry also as they don't use an oil thrower to get oil to it so it sheared the splines like the first R380's,we used to fit Macnamara output gears that had a boss as long as the OME gear and PTO spacer so gave a longer spline engagement.From memory the 1HDT engine came out in the 80 series and it was a terrible motor,it suffered so many warranty replacements tojo stopped selling them. Pat

Please, use the enter button atleas once per post Pat

The 1HDT came out in the 80, was superceded by the 1HD-FT, it never stopped being sold, the first was the original that had all the big end bearing failures

Nissan Crack chassis, Tojo screw big end bearing, Land rover.........