Outer Limits 4x4 Board

Hi all I've a mate who hates diesels and wouldnt' buy a 2nd hand one with over 50000kms on it because they get glazed bores and run rough and inefficiently. Any comments?

Diesels will only get glazed bores if left idling for to long or say only reved to 1500rpm for example for the whole of its life.running rough and inefficent could be maintenance on diesels because most owners don't do it,example injectors should be rebuild every 100 000.check fuel they use also pretty common for kero to be blended in diesel,air filters list goes on.Just my opinion but i don't think there is a difference in petrol or diesel after 500 000 you would need to check each of them thoroughly anyway.

Hobes wrote:Hi all I've a mate who hates diesels and wouldnt' buy a 2nd hand one with over 50000kms on it because they get glazed bores and run rough and inefficiently. Any comments?

Ask another mate... his opinion is flawed..

Bazzle

Yeh.. me mate bought a 3l surf and it would be getting 12mile gallon on highway. (between rockhampton and brisbane) with no load.

I have not heard much of this phenonmena in say 4wd monthly or before

apparently the motors blow huge amounts of black smoke under load.

Fatrolls wrote:Yeh.. me mate bought a 3l surf and it would be getting 12mile gallon on highway. (between rockhampton and brisbane) with no load.

I have not heard much of this phenonmena in say 4wd monthly or before

apparently the motors blow huge amounts of black smoke under load.

Needs a tune and service!!

Drive a 2.4 TD Surf. I think I glazed up the bores after 3 days of 4wheelin in Eden, with lots of idle time. On the way back she felt a little sluggish, but after about 50 km of highway load, she freed up again.

More positives to a diesel than negatives any day IMHO...

Drive a 2.4 TD Surf. I think I glazed up the bores after 3 days of 4wheelin in Eden, with lots of idle time. On the way back she felt a little sluggish, but after about 50 km of highway load, she freed up again.

More positives to a diesel than negatives any day IMHO...

A Diesel that is Glazed will only have high oil consumption.

skinny wrote:Diesels will only get glazed bores if left idling for to long

how long would you say is too long? What about delivery trucks, such as refridgerated transport that leave their motors idleing while loading/unloading?

HJ60_HEATHUS wrote:

skinny wrote:Diesels will only get glazed bores if left idling for to long

how long would you say is too long? What about delivery trucks, such as refridgerated transport that leave their motors idleing while loading/unloading?

They probably start to glaze alittle. But when they are running they are under load so this is usually removes the glazing problem.
I know where I used to work, it was only a 8km drive pretty much at a constant 60km/h. So after a week of driving it used to feel like it was lacking power. Then on the weekend I would go for a bigger drive with speeds upto 110km/h and it seemed to come good after a nice hot run. Where as the short trips to work, it barley even got warm.

Got a glazed engine. Work the old girl! Hook up a big trailer and go drive up big hills for a while. Thats why truck engines go so long. I know they dont rev but there always loaded up.

another method i have heard of which is suppose to fix to problems at once is drain all the old oil out fill up with diesel instead of oil then let idle for 2-3 minutes at runnign temp(best to achieve this before draining oil)then give a few good revs stop and drain fuel out. this shouldt roughen up the bores a littel to help remove the glazing and also get rid of the clogged up oil and other junk in the oil galleries

Hobes wrote:Any comments?

your mate has shit for brains.

I think that this glazed bore issue is a little far fetched. What about big ships that come into port like container ships. With some of them if they are docked for less than 5 days they wont shut the engines down because there is more wear on the engine on start up. So they sit and idle for up to 5 days.

I just dont know what to make of Ang's one with 680,000 on it, or Woops with 560,000+
they must really be for the scrap heap

if your refering to ships like huge coal carrying or container ships, my understanding is they shut one motor down whilst at sea climb in to the bore and scrub the carbon etc off the bore walls they will do this each trip across.Plus they don't run on diesel they use a crude oil almost.

Deisels can get glazed bores from continuous extended idle periods, the fire trucks we use in the RFS get left running at all times at a fire and therefore the hand throttle is alsways turned up to 1500RPM as soon as you get out of the truck....as long as there is some heat there they are fine.

As for no more than 50,000kms A deisel is only just getting run in at those kind of kays, I think your mate may have being mis informed

bogged wrote:

Hobes wrote:Any comments?

your mate has shit for brains.

You can talk Bogged, you were telling people a little while ago to run their engines without any oil

batcho101 wrote:another method i have heard of which is suppose to fix to problems at once is drain all the old oil out fill up with diesel instead of oil then let idle for 2-3 minutes at runnign temp(best to achieve this before draining oil)then give a few good revs stop and drain fuel out. this shouldt roughen up the bores a littel to help remove the glazing and also get rid of the clogged up oil and other junk in the oil galleries

Sounds like a good way to creat a crankcase explosion.

The best way to stop a diesel from glazing is to give it a "burn out" after running at low revs and low loads for extended periods. Just take it out and make the bastard work hard for about 30 mins. I'm not saying flog it stupid, but as was mentioned already, hook up a loaded trailer and drive up some good hills.

As for the big ships out there, they normally do shut down the main engines while alnogside, it is their generators that they leave on and as these are usualy under large electrical loads, such as powering cranes, cargo pumps as well as usual domestic uses, glazing is not a problem.

How do you know if a diesel has glased bores?

Does it just consume more oil or what?

My TD42 is always towing motorbike trailers and boat trailers so I doubt mine are glazed, but would be good to know just how obvious it is if they do get glazed.

Cheers

dieseldude wrote:How do you know if a diesel has glased bores?

Does it just consume more oil or what?

My TD42 is always towing motorbike trailers and boat trailers so I doubt mine are glazed, but would be good to know just how obvious it is if they do get glazed.

Cheers

JUst feels underpowered and sluggish. But after a nice hot run. seems to run allround smother and revs bettter.

Most of the hi tec diesels oils these days are modified to stop glazing of the bores.

Read the label and choose an oil that is suitable for your application.

mkpatrol wrote:You can talk Bogged, you were telling people a little while ago to run their engines without any oil

It was obviously beyond your simple mind....

bogged wrote:

mkpatrol wrote:You can talk Bogged, you were telling people a little while ago to run their engines without any oil

It was obviously beyond your simple mind....

Simple eh? Thats ok everbody is entitled to their opinion even if yours is wrong and ususually unconstructive

mkpatrol wrote:

bogged wrote:

mkpatrol wrote:You can talk Bogged, you were telling people a little while ago to run their engines without any oil

It was obviously beyond your simple mind....

Simple eh? Thats ok everbody is entitled to their opinion even if yours is wrong and ususually unconstructive

Yes very simple. Lets put it in to 1+1 for you, or would you like it easier?

You run your engine before you drain the oil Correct?

Everything that gets lubed in the engine will be coverd in oil - correct?

(still with me?)

You think that the moment you drain the oil out of your engine, every last micron of oil is cleaned/drained from every single lubricated part of the engine - Correct?

Cause it just doesnt... unless you let your engine drain for days... or you leave your drain plug out for 10-20 mins, everythin inside that is meant to be lubricated, will still be coated... Running the engine for 5-8 secs to drain the filters, wont do any harm. the 3 examples with over 500,000klms I gave you wouldnt possibly sort of maybe sorta show u that, or is that too difficult to understand?

.... cause EVERYTHING THAT IS MEANT TO BE LUBRICATED STILL WILL BE...

You just dont get it do you?

Bogged,

YOU'RE A WANKER!!!!!!!

Stop giving everyone such a hard time for once.

Why do you always have to have the last say?

Make a comment that is appropriate or don't leave one at all!

It's as simple as that!

I'm sure I speak for a lot of people when I say that we're sick of seeing your avatar with a smart-arse comment next to it stirring shit...........

Move on!

dieseldude wrote:Bogged,

YOU'RE A WANKER!!!!!!!

Stop giving everyone such a hard time for once.

Why do you always have to have the last say?

Make a comment that is appropriate or don't leave one at all!

It's as simply as that!

I'm sure I speak for a lot of people when I say that we're sick of seeing your avatar with a smart-arse comment next to it stirring shit...........

Move on!

OWNED


I guess Bogged wins the prize

barnsey wrote:Slightly OT (from the Bogged Blog and the original topic) ......

Does it do any harm to have a diesel not running at all for a few weeks?

My Patrol only gets driven on 4wd trips.

Generally not as long as you do run it every few weeks. Usually when an engine sits for long periods of time the rings lose their tension causing the engine to lose compression becoming hard to start and use oil. The cylinders can also accumulate mousture and corrode the bore causing other problems. There is no real set imes for these things happening beacause some engines are built better than others.
I have recently rebuilt an FE Mazda motor for my wifes stepfather & being the bodgy he is he didnt want it bored, even after the cylinders were honed it still had water marks in the bores. I slapped it together & it goes like a train even though in reality it should go like a dog.
There is no set solution.

Most engines with glazed bores will use oil rather than lose compression. I have removed a head off a Mitubishi Astron 2.6 engine with 60,000ks on the clock & it had glazed bores & it was doing 75k's per day to work and back & never been idled for long periods.

Do petrol motors suffer from glazing in much the same way as diesels?

i.e such that if a petrol motor isn't worked (Not have the guts flogged out of it, but laboured) will it glaze up also?