Thread: TD5 cylinder glazing

what caused it?
a dodgy hone job and both brands of oil!
i didnt know the castrol magnatec was available for diesel's and dello 400 is for trucks, primarily. ive got drums and drums of the stuff at work and there is no way i'll put it in my TD5!

with intelligent molecules that cling and bond to metal sounds like the old slik50!

cheers phil

Originally Posted by discowhite

what caused it?
a dodgy hone job and both brands of oil!
i didnt know the castrol magnatec was available for diesel's and dello 400 is for trucks, primarily. ive got drums and drums of the stuff at work and there is no way i'll put it in my TD5!

with intelligent molecules that cling and bond to metal sounds like the old slik50!

cheers phil

Sorry Phil, but that's wrong.
Magnatec is a mineral oil that just has a small amount of ester in it.
From memory it also has a CF diesel rating, making it suitable for passenger car and light commercial diesels.
Esters are polar, hence they 'cling' to metal. Nothing like PTFE/teflon.
While Delo (I'm assuming 400) is a 15W-40 oil, above about 10*C it runs pretty much the same viscosities as any 5W-40 available, and may even do below this.
I posted on this in the past, showing a slew of oils that were available at the time and where one 15W-40 was a lower viscosity at 0*C than a 5W-40.

The rings haven't seated as either;

1. they weren't loaded up properly in the first place. We used to find the nearest hill, pick a fairly high gear, eg. 4th and hit the bottom and bore it into an engine. This load forces the rings bed.
When running in never stay in one rev band and work the engine with various loadings.
With race engines this is simulated on the dyno.

2. poor honing match to ring type

3. (and most likely) leaky injectors, injector 'O' rings or a cracked rail in the head causing fuel dilution. Excessive idling will also do this.
A bloke I know who ran a fleet and was an advisor to industry and an oil expert told me any of his drivers that idled for more than two minutes faced 'counselling', and if they continued to do it were dismissed. They'd download the data from the engine ECU every service to check !

Just to add, Idling a diesel is a big no no, Especially one that is still in a running in state. Secondly, overcooling will cause similar problems as you get incomplete combustion, so make certain the engine gets to operating temp quickly, and that as soon as you start it you DRIVE it .

Anyway, oils play a reasonably big part in good ring sealing during running in, but the manner in which the engine is driven during this time is the key factor. Don't 'lug' it, don't idle it, don't overrev it, but everything in between and varying load conditions are best.

JC

Originally Posted by justinc

Just to add, Idling a diesel is a big no no, Especially one that is still in a running in state. Secondly, overcooling will cause similar problems as you get incomplete combustion, so make certain the engine gets to operating temp quickly, and that as soon as you start it you DRIVE it .

Anyway, oils play a reasonably big part in good ring sealing during running in, but the manner in which the engine is driven during this time is the key factor. Don't 'lug' it, don't idle it, don't overrev it, but everything in between and varying load conditions are best.

JC

So much knowledge... put so succinctly.

When I bought my Tdi the oil was mobil 1 and cylinder glazing and high oil usage were the norm.I changed to Penrite and mine took another 20,000k's but it came good.I know Owen Rumble well,the second oldest LR dealer in Oz and he used to say to me ''drive it like you stole it'',they don't need running in,they need to work. Pat

Originally Posted by PAT303

When I bought my Tdi the oil was mobil 1 and cylinder glazing and high oil usage were the norm.I changed to Penrite and mine took another 20,000k's but it came good.I know Owen Rumble well,the second oldest LR dealer in Oz and he used to say to me ''drive it like you stole it'',they don't need running in,they need to work. Pat

Mobil make a Mobile 1 for diesel engines called Mobil 1 Delvac. I use it and I know a heap of other people on here do to. It's quite well regarded.

Originally Posted by rick130

Sorry Phil, but that's wrong.
Magnatec is a mineral oil that just has a small amount of ester in it.
From memory it also has a CF diesel rating, making it suitable for passenger car and light commercial diesels. i didnt know the castrol magnatec was available for diesel's
Esters are polar, hence they 'cling' to metal. Nothing like PTFE/teflon. with intelligent molecules that cling and bond to metal sounds like the old slik50, i didnt say this was fact.
While Delo (I'm assuming 400) is a 15W-40 oil, above about 10*C it runs pretty much the same viscosities as any 5W-40 available, and may even do below this.
I posted on this in the past, showing a slew of oils that were available at the time and where one 15W-40 was a lower viscosity at 0*C than a 5W-40.

The rings haven't seated as either;

1. they weren't loaded up properly in the first place. We used to find the nearest hill, pick a fairly high gear, eg. 4th and hit the bottom and bore it into an engine. This load forces the rings bed.
When running in never stay in one rev band and work the engine with various loadings.
With race engines this is simulated on the dyno.

2. poor honing match to ring type a dodgy hone job

3. (and most likely) leaky injectors, injector 'O' rings or a cracked rail in the head causing fuel dilution. Excessive idling will also do this.
A bloke I know who ran a fleet and was an advisor to industry and an oil expert told me any of his drivers that idled for more than two minutes faced 'counselling', and if they continued to do it were dismissed. They'd download the data from the engine ECU every service to check !

my experiance with delo 400 goes back to 99 (it was branded something else back then) on average ide use 205L of the stuff every 3 weeks servicing fleet, small motors up to V12 deutz air cooled 400kw genny's
the maximum service interval was 400hrs depending on the type of motor. most lighting towers require servicing after 250hrs. spose what im getting at is that it does an ok job at stationary fixed RPM engines but from what ive seen of it, no i wouldnt use it in a modern diesel engine.

cheers phil
ps i didnt go to uni...

Originally Posted by justinc

Just to add, Idling a diesel is a big no no, JC

You would hate what gets done to our work Landcruisers then. Mostly 1HZ, couple of 1HD/FTE.

Start up in the morning, get shut off at the end of the day.

Total distance treavelled can be only a few km . When I drive mine on the open road, I give it a bit of a hiding to try to negate the effects of hour after hour of idling.