Glazed bore on diesel motor ?

Please do a search on this in the archives especially the bon ami (big no no) - Usually changing your brand of oil will help.
You will find using Penrite oil will help deglaze the bores as it is a non friction modified oil. Ring Penrite or check their website. (www.penrite.com.au)

Nick

Heard of this "Bon Ami" fix,Do people actually still do this?

Best fix???? Buy a Nissan!!! LOL

Pesty,

We had a 38 foot displacement hull boat wit a GM 371 diesel engine ( about 40 years old and 20 years since rebuild). It was blowing a bit of blue smoke on start and initial running, but after 5 minutes running at full throttle (governed), 1500 rpm, no smoke. I spoke to an expert at Detroit Diesel and he said "drive it like you hate it". Give the bloody thing a good hiding regularly or the bores will glaze.

As for the Bon Ami fix, he STRONGLY recommended AGAINST it. That sort of grit circulating in other parts of the engine will do untold damage. Bearings for instance rely on lubrication to last, an abrasive substance will destroy them. As for the theory of not turning diesels off, I'm not convinced. A lot of time idling is just likely to glaze the bores; diesels like hard work.

Don't just listen to the likes of me, talk to an engineer as I did. They know the facts.

Good luck with you projects.

steve

I have not tried bon ami but I did try Ajax once on a motor that needed its rings bed in just a little. It was a petrol carby motor so it was easy. I just got the revs to flat out screaming and poured in the ajax until the motor almost died, then slowly coughed its way back to flat out revs. Repeated this process several times till I run out of Ajax. It totally stuffed an already almost stuffed motor. I never drove it again cos it just blew too much smoke. Maybe I should of used bon ami but I am not sure how you will get it in without also giving the turbo a bit of a clean.

Let us know how you go.

Sean

"a lot of idling, poking around streets, stop starting in low gear, as well as a lot of open road work, 1000ks a week."

I have to say, the above quote would describe a lot of people's automotive weeks. I don't see how this would be much more extreme usage than most diesels in a Sydney environment ( with a weekend away thrown in ) for example.

Josh.

bon ami will scour the bores and any thing else it touches....best not to use it!!

give it curry and this will help reduce it ...if this is whats happening????

are you doing idling work constantly for two hours or so...or do you break the cylce with highway driving?

I wouldnt be worried in the slightest if my engine uses less than a litre of oil to each 5000km oil change....Does it blow a little puff of blue on startup also????...
Could even be the valve stem seals a little worn or hard and when you do your slow work the engine cant disguise the smoke in the day to day black fuel smoke....
I idle my 4x4 for 8 to 10 hours somedays whilst exploring tracks or cooking lunch with the a/c going and no probs at all.....
And just for the record my engine uses an unmeasurable amount of oil between changes and i change filters every 5000km also....

Steve.
My HJ61 TD (260,000 ks) blows a cloud of smoke on starting and a little when coming off idle and has done so , according to the previous owner, most of it's working life. Uses virtually no oil and performs well. "If it ain't broken, don't fix it!"
Mick.

I had a simular problem with an FJ55 (petrol) I have.

It would puff out clouds of blue smoke when going down hills so I got one of the bottles of engine reconditioner form Kmart. This stuff is supposed to clean out the rings etc. I thought what the heck I would give it a go what did I have to loose.

It actually worked and reduced the smoke by about %90 so I would say give it a go if it is a problem for you.

I could be a stuck ring and this may help.

Tony N.

Ask a fireman or whoever services their fire trucks what they do. I would imagine a fire truck sits at idle for a long time every now and then.

Having been in the Rural Fire service for 13 yrs, I know what your talkin about here. Our trucks suffered regularly.. But from Sydney down to Wollongong and back was a good run, and the trucks were totally different to drive after that.

Since our trucks were specifically Village Protection, and where we were being so small an area, they would only do probably 10-20klms a week! with most runs being up to Steve and Effies shop for lunch or night training runs. Some weekends we would go 'out of area' to do training with other brigades, which would also be a good run of 30-80klms but again, mostly thru suburbia.

Also 8 yrs of drivin trucks, you noticed the difference in the truck on the way back from Orange/Eden/Melb/Newcastle/Brissy/etc after a week or 2 doing local.

So take it for a good long run with some big hills in it, vary the throttle, up and down and maybe run some Nulon Diesel Injector crap in it, I run that in my GQ with each tank...

YMMV.

I drive a coaster bus with a 1HZ for work these days, when I started the job at the beginning of the year the motor blew lots of blue smoke and used nearly 3 litres of oil between 5k changes.
After 6 months of me driving it in suburban work the oil consumption is back to about 1- 1 1/2 litres between changes as I rev it pretty hard and the engine obviously appreciates it.
I suspect that the previous driver tended to lug it a lot and not rev it as hard which would tend to glaze the bores up.