TD42 engine life span.......

Submitted: Saturday, Sep 27, 2003 at 19:02
ThreadID: 7471 Views:26942 Replies:7 FollowUps:3
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Anyone know if TD42 engine on GQ can clock up to 500000km without any major job e.g. head job......?

Anyone has got the most km out of their TD42 ? How many km has it done?
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Reply By: GLAYVA MAN(bendigo) - Saturday, Sep 27, 2003 at 19:29

Saturday, Sep 27, 2003 at 19:29
gday iamgq.
4.2 can do that many ks but all depends on servicing.
if you dont know the history it could cause heart ache.
if serviced for that long and still going with out all the tell tale signs of wear(blowing smoke ect) should be ok.but remember thats lots of ks and wouldnt be far from overhaul. jamieson wild cat
AnswerID: 32190

Reply By: Martyn (WA) - Saturday, Sep 27, 2003 at 21:23

Saturday, Sep 27, 2003 at 21:23
As mentioned it's a lot of K's, my MQ with the 3.3 diesel got to 500k + before I changed the engine, servicing is the critical bit, plus the general treatment of the engine, if the engine has a hard life the K's will I suspect be compromised. No matter how many K's there will be still things like injectors, fuel pump servicing to be considered. Other diesel engined vehicles get over the million so there is no reason why you can't get too and past the 500k mark. All my opinions as usualKeep the shiny side up
AnswerID: 32191

Reply By: ross - Saturday, Sep 27, 2003 at 23:52

Saturday, Sep 27, 2003 at 23:52
There is 3 main things that gives any engine a long life.
1 servicing
2 the driver
3 waming an engine up and driving LONG distances.When you start a cold motor up the pistons and rings expand quickly and are forced against the cylinder walls until the block expands.So the more an engine is started and stopped after driving short distances the lower its ultimate life is before a rebuild is necessary.This is why taxis with 6 cyl petrol motors reach 7-800000 klms even with the low quality driving skills of SOME drivers.Diesels in particulor need to be warmed up completely before driving off.This is often mandatory if you drive someone elses truck.I think there is a rule of thumb for warming up a diesel and its something like a minute for each litre of engine capacity.

In answer to the original query,my friend has a GQ LWB 3ltr petrol motor that has reached 400000klm without needing anything major.Note this vehicle was used by an owner of business which required him to drive between Perth and Kalgoolie
several times a week.So if your 4.2 is on the road for long hours it wont be a problem.
AnswerID: 32206

Follow Up By: Member - Eric- Sunday, Sep 28, 2003 at 07:53

Sunday, Sep 28, 2003 at 07:53
you will notice that all diesel motors that run all day , last forever , its the stop start , city life that kills them , if its been a Toorak Tractor carting kids , starting at the house switching off at school , same senario at shopping center ,. you will find that they die at around 250 kms , almost half its real life .

Just thought I would add that in , I agree with all you boys Craigs hut 2003
FollowupID: 23003

Reply By: Member - John- Sunday, Sep 28, 2003 at 08:31

Sunday, Sep 28, 2003 at 08:31

I have seen TD42 engines' do well in excess of 500,000kms - I know of one with about 750,000kms on it.

I have a 2H with 664,000kms on it. The pump was overhauled at 480,000kms and injectors - about - every 200,000kms, this is the only thing I have done to the engine apart from regular servicing.

Whilst I agree with the comments on cold starts, short runs etc, the 2H is used in a landscaping business and spends most of its life in the metro area with short runs a reality. I use synthetic oil and change the oil every 10,000kms - the filter gets changed at 5,000kms. From analysis (on the oil), I could probably go to 15,000kms - but - prefer the peace of mind. I also belive that the best way to warm a motor up is to drive it. Excessive idiling is not good for a diesel.

My 2 bob's worth........
AnswerID: 32215

Follow Up By: Rosco - Sunday, Sep 28, 2003 at 13:11

Sunday, Sep 28, 2003 at 13:11
I was also of the opinion it was best to warm up a diesel before taking off. However in the handbook of my recently purchased Defender they specifically advise against idling to warm up. All that is stated is to idle until the oil pressure light goes out ... almost immediately of course and then to take off without excessive acceleration.

I tend to agree servicing and type of use would be the main criteria.
FollowupID: 23013

Follow Up By: David N. - Monday, Sep 29, 2003 at 10:09

Monday, Sep 29, 2003 at 10:09
G'day John, what brand/ type of oil are you using?
FollowupID: 23063

Reply By: David N. - Monday, Sep 29, 2003 at 10:17

Monday, Sep 29, 2003 at 10:17
Mine is old in years but relatively young in klms.
However, I know of two with well over 500,000klms which have not been touched mechanically. (one now has 650,000+ ) Both belonged to my cousin (work vehicles) both were turboed from near new, both driven hard but well maintained. They now belong to his staff, ie: remained "in the family" so to speak. They have both been quite remarkably reliable - never a problem.
AnswerID: 32284

Reply By: Truckster (Vic) - Monday, Sep 29, 2003 at 11:36

Monday, Sep 29, 2003 at 11:36
Depends on history etc.

Nick W on GQ list has 530,000 he has owned since new using RImula X oil. There are several others lasting similar periods without hassles.
AnswerID: 32294

Reply By: Member - John- Friday, Oct 03, 2003 at 20:14

Friday, Oct 03, 2003 at 20:14
Hello David N.

Apologies for the delay in replying - I've been away for the week.

I use Mobil 1 and have done for the last 300,000kms. Mobil do make a specific synthetic (Delvac) for diesels and it is recommended especially for turbos.

I started with Mobil 1 (Delvac can be hard to find) and from the analysis (by Mobil) on the oil it seems to be doing the job very well.


AnswerID: 32722

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