100 series turbo problems

Submitted: Friday, Nov 25, 2005 at 19:57

ThreadID: 28375 Views:3900 Replies:10 FollowUps:2

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03 cruiser

Hi guys ,i am considering putting a turbo on the std 100 series 1HZ but i have heard that the transmission on this model is very weak and there have been quite a few of them ripping the teeth of the main splin because of the extra power and torque of the turbo,I have also heard that the turbos if not set up correctly can run tooo hot and blow the heads and valves of the engine. Can anybody else confirm this or have heard of this happening to friends and the like?.I dont really wanna spend $6k too spend anothr 6 on a new engine or tranny i would rather be slow on the road and reliable. Cheers Stephen

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Reply By: Member - Phil G (SA) - Friday, Nov 25, 2005 at 20:14

Friday, Nov 25, 2005 at 20:14

I've heard the same from people who have turboed their 1Hzzzz.

The transmission that bolts behind the 1Hzzzz is the R151F - same as on the Prado.

The transmission that bolts behind the 1FZ-FE, and factory TD LandCruisers is the H150F and H151F which is a stronger unit.

AnswerID: 141025

Reply By: Rosco - Qld - Friday, Nov 25, 2005 at 22:04

Friday, Nov 25, 2005 at 22:04

Oh what a feel'in

AnswerID: 141046

Reply By: Member - Trevor R (QLD) - Friday, Nov 25, 2005 at 22:12

Friday, Nov 25, 2005 at 22:12

Stephen,

First hand experience with how weak the box is on these things (3 in 18months) in a bog standard 100 series. They have a tuff life if they're in my garage though.
I looked at the same thing you want to do and after talking with heaps of different people (so called experts??) came to the conclusion it was too risky to proceed, hence the patrol (wish I hadn't gone this option either sometimes). I also seriously considered the blower option on the cruiser but felt the box would not handle it, seems like less problems come from those who have went down the supercharger option but that maybe due to the fact that nowhere near as many people go this way ?? I don't know. In the end there will be plenty of people who will tell you they have had good results so the choice is yours.
I would suggest to talk to someone like Denco about the turbo option and then talk to your nearest gearbox specialist about what can be done to the box to cope with the extra neddies if you turbo it.

Cheers Trevor.

AnswerID: 141048

Follow Up By: 03 cruiser - Saturday, Nov 26, 2005 at 12:08

Saturday, Nov 26, 2005 at 12:08

Trevor have you looked at completely replacing the box with something else,i cant seem to find many options for a bolt out- bolt in scenario.What actually lets go in your gearbox and how much is it to reapir it roughly?. Cheers Stephen

FollowupID: 394765

Follow Up By: Member - Trevor R (QLD) - Saturday, Nov 26, 2005 at 21:26

Saturday, Nov 26, 2005 at 21:26

Stephen,

The vehicle was sold 5yrs ago now. I had it from new for 18mths and as soon as I heard the same familiar noises after the second box rebuild, I said enough was enough and it was traded for my current vehicle (Nissan). All work was done under warranty and they were full rebuilds both times. First time Toyota pulled the box down it was 1,2,3and 5th gears that were a problem. Second time it was only 5th, but under the circumstances they replaced pretty much everything again. Third time as I said it was just my ears doing the diagnosis so I don't know exactly what the problem was and I didn't want to know.
In relation to "Is there anything to strenghten the box?". I think you will find if you have the dough it can be done, but a gearbox specialist will advise you better on that. I remember I talked a lot with Gabba Gearboxes up here in Brissy when I was looking into it and they were very informative. I'm sure Marks adaptors in Melbourne would also be able to advise you well, regarding what box fits with what donk.
The supercharger mob I talked to were in Perth and they too were very helpful. Either CAPA or Brunswick diesel I can't remember, only that they were in Perth.
Hope this helps and I hope you have a better run, than I did, with your Cruiser.

Regards Trevor.

FollowupID: 394804

Reply By: Member - Davoe (Widgiemooltha) - Saturday, Nov 26, 2005 at 05:27

Saturday, Nov 26, 2005 at 05:27

http://www.safari4x4.com.au/80scool/tech/1hz_turbo_failures/1hz-failures.html

AnswerID: 141070

Reply By: Big Woody - Saturday, Nov 26, 2005 at 07:42

Saturday, Nov 26, 2005 at 07:42

Hi Stephen,

I don't know anything about the transmission failures but as far as putting a turbo on a 1HZ engine I do have some thoughts.

I have a 1991 80 series 1HZ which has had a Mike Vine Turbo fitted since the day it left Toyota Dealership nearly 15 years. The motor has now done just under 300,000 km's and has never been touched. A lot of these miles have been towing a very heavy tandem caravan from NNSW to the Northern Territory every year so it has had a workout. It has also been serviced every 5000km with good quality oils. (Cruiser Oil made by Synforce). It still sounds as smooth and quiet as it did brand new and doesn't use a drop of oil between changes.

My thoughts form the research that I have followed closely on the engine failures are:
Don't have the boost set too high on the turbo on these motors.
Have a good quality cooling system (mine has never been hot once)
Use good quality oils (synthetic if possible)

A lot of the bearing and other issues that I have seen usually seem to have been connected to running to high a boost on the turbo resulting in high temperature issues.

I may be wrong but these are just my thoughts.

Brett

AnswerID: 141073

Reply By: 100 Series - Saturday, Nov 26, 2005 at 12:38

Saturday, Nov 26, 2005 at 12:38

I have a MTQ turbo on my standard 2001 cuiser and have not had a problem. It has been on for two years now and I had it re-dynoed this week and it is returning 161hp at the rears with 770mn torque.

I had the injectors serviced recently and fitted a 3inch mandrel bent exhaust system which improved it dramatically. The main thing is to ensure that the thing is correctly tuned to prevent any problems.

DENCO get some pretty good write ups so I would talk to them if I was going to do it all again.

There is an article in the 4wd monthy in issue 85 and 86 where a std 100 series was fitted with a denco turbo and intercooler. The cost was around $5500 with exhaust system.

AnswerID: 141105

Reply By: V8Diesel - Saturday, Nov 26, 2005 at 14:34

Saturday, Nov 26, 2005 at 14:34

Howdy 03, just last week I was talking to Brunswick Diesel's about slotting a 6.5 Chev diesel into my 2000 GXL manual 100 series. They said if I had a petrol model it would be hunky dory as they have the big box in them, but the diesel powered HZJ105 1HZ has a much smaller gearbox that won't safely handle any additional grunt. He reckons the input shaft is about the thickness of his finger.

On the other hand, I've driven heaps of km's in the 'Belmont' Landcruiser's and never had a problem. About two zillion hire vehicles can't be too far wrong can they?

AnswerID: 141114

Reply By: 03 cruiser - Saturday, Nov 26, 2005 at 16:58

Saturday, Nov 26, 2005 at 16:58

Thanks for the replies so quickly guys......For you guys that have done the conversion how much 4wd do you do and how hard is the car working,i believe that if you do the conversion and do the odd punt up a beach or two then it wiil be fine but if you start going a bit harder up some serious rutted tracks with a locker or two engaged then i think it will let go pretty quick.Do any of you guys use lockers or mud tyres??,Im trying to asertain how much i could do in my vehicle with the conversion,also do you guys use a EGT??. Cheers Stephen

AnswerID: 141124