Bru
Well-Known Member
No, no, you go for it ... just give me a minute to sort out my camera ...........
Has anyone tried this bleeding method: spraying diesel into the air intake?
- Thread starter NealB
- Start date
No, no, you go for it ... just give me a minute to sort out my camera ...........
reeac
Well-Known Member
With my Kubota tractor you can ignore the bleed points and just leave the knurled ring that holds the filter bowl slack after turning on the fuel tap below the tank. Tighten up when fuel appears. That's when doing a filter change.
dolabriform
Well-Known Member
This is exactly what a very experienced engineer told me to do, and I can confirm it works a treat.
Sea-Fever
Well-Known Member
A polite warning.
Sea-Fever
Well-Known Member
A polite warning
pandos
Well-Known Member
I did that but attached to the high pressure pipe on an injector...(with a little rubber hose... Started so fast I got a fright...(we used to do this years ago with plant that had been run dry and the batteries were not very good)
This guy does a full ebild of the pump ...I followed tis a few years ago using a parts kit from a tractor place.might be worth a look at if you still can't get it to start... especially the part where the stop lever connectd...
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coopec
N/A
Maybe I'm missing something? Why are people marketing aerosol starting fluids for diesels if they aren't safe?
(I wouldn't use an aerosol on my own diesel engine but then my son is a diesel mechanic.)
I bought a pressure pack of Start ya bastard the other day. I'm sure if there was a problem starting diesels with it it wouldn't be marketed as safe for starting diesels.
Can you use Aerostart on a diesel?
CRC Aerostart is a special formulation combining a number of ingredients, each designed to play a vital part in starting engines. ... Ideal for use in all diesel, petrol and kerosene engines in: Tractors, heavy equipment, power lawn mowers, inboard and outboard marine engines, chain saws, compressors, stationary engines.
CRC Aerostart | Spray To Help Your Engine Start Instantly - CRC NZ
(I wouldn't use an aerosol on my own diesel engine but then my son is a diesel mechanic.)
I bought a pressure pack of Start ya bastard the other day. I'm sure if there was a problem starting diesels with it it wouldn't be marketed as safe for starting diesels.
Can you use Aerostart on a diesel?
CRC Aerostart is a special formulation combining a number of ingredients, each designed to play a vital part in starting engines. ... Ideal for use in all diesel, petrol and kerosene engines in: Tractors, heavy equipment, power lawn mowers, inboard and outboard marine engines, chain saws, compressors, stationary engines.
CRC Aerostart | Spray To Help Your Engine Start Instantly - CRC NZ
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coopec
N/A
This video clip explains the problem using starting fluids. I think the point made @ 4 minutes 40 seconds is relevant to this thread.
After explaining the damage the fluid can cause to a diesel engine he goes on to say "I don't think there is any diesel mechanic that hasn't used a starting fluid" blah blah blah......
After explaining the damage the fluid can cause to a diesel engine he goes on to say "I don't think there is any diesel mechanic that hasn't used a starting fluid" blah blah blah......
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Bru
Well-Known Member
A good well balanced video
He's spot on at the end .. anybody who has worked with diesel engined equipment for any time will have resorted to the Easy Start at some point! At gone six on Christmas Eve in the middle of a field on a freezing cold night, that excavator they off hired just before they went home is going to start or it's going to die!
The crucial point he makes, and the one he doesn't quite get around to making, is that a SMALL blast of starting fluid ONCE into the intake before turning the key might be the difference between life and death (for the engine if not for the plant lorry driver!)
Spraying too much and especially spraying starting fluid into an engine that is already turning over (or worse actually trying to run) is a BAD thing. Can be a REALLY bad thing
At least in the original vid they were spraying neat diesel into the engine, which isn't quite as bad but still a bad thing
As the guy in Coopecs video points out, modern engines are engineered to much tighter tolerances than older diesels and they're a heck of a lot lighter (and therefore more delicate) than the old heavy lumps. They don't thrive on abuse and flashing ether, or even neat diesel, into the air intake is engine abuse!
Oh and there is certainly truth in the old saw that engines can become addicted to Easy Start. The more it's used, even without catastrophic damage, the more the bores get worn, the lower the cold start compression, the more difficult it is to start, the more often Easy Start is necessary and repeat
Personally, I'd reach for the Easy Start in extremis on old heavy engines with cast iron blocks and pistons and I might reluctantly risk it on a modern light industrial (e.g. Kubota) that I didn't own but I wouldn't go near the stuff on any engine with alloy components
He's spot on at the end .. anybody who has worked with diesel engined equipment for any time will have resorted to the Easy Start at some point! At gone six on Christmas Eve in the middle of a field on a freezing cold night, that excavator they off hired just before they went home is going to start or it's going to die!
The crucial point he makes, and the one he doesn't quite get around to making, is that a SMALL blast of starting fluid ONCE into the intake before turning the key might be the difference between life and death (for the engine if not for the plant lorry driver!)
Spraying too much and especially spraying starting fluid into an engine that is already turning over (or worse actually trying to run) is a BAD thing. Can be a REALLY bad thing
At least in the original vid they were spraying neat diesel into the engine, which isn't quite as bad but still a bad thing
As the guy in Coopecs video points out, modern engines are engineered to much tighter tolerances than older diesels and they're a heck of a lot lighter (and therefore more delicate) than the old heavy lumps. They don't thrive on abuse and flashing ether, or even neat diesel, into the air intake is engine abuse!
Oh and there is certainly truth in the old saw that engines can become addicted to Easy Start. The more it's used, even without catastrophic damage, the more the bores get worn, the lower the cold start compression, the more difficult it is to start, the more often Easy Start is necessary and repeat
Personally, I'd reach for the Easy Start in extremis on old heavy engines with cast iron blocks and pistons and I might reluctantly risk it on a modern light industrial (e.g. Kubota) that I didn't own but I wouldn't go near the stuff on any engine with alloy components
Kukri
Well-Known Member
Naughty!????
Tamar
Well-Known Member
An outboard motor fuel bulb works a treat.This is exactly what a very experienced engineer told me to do, and I can confirm it works a treat.
NealB
Well-Known Member
As the person to whom Paul's comments were presumably aimed, I must say that I found them neither 'impolite' (#26) nor 'naughty' (#36).
They got the message across that there are, possibly serious, downsides to spraying diesel into the air intake (and I did, very deliberately, ask about downsides).
Anyway ....... the bloody thing still hasn't started!
Thanks to all for the warnings!
Bilgediver
Well-Known Member
Sounds like it is time for you to start a new thread telling us if you have primed it and got rid of the air in the fuel system and if you have good compression.
My old donk after a winter ashore can be a bit slow to get going however one trick is to squirt a few squirts of engine oil down the inlet port towards the inlet valves. WInd the engine over decompressed to spread it around and get rid of the excess and then start. I also oil the engine bores in this way at the start of layup.
Do NOT do this if no decompressors. You may get Paulitus.
coopec
N/A
That crossed my mind too. There is a definite sequence to bleed the system. If there is any air in the fuel system between the fuel tank and the injectors it won't start. FULL STOP!
NealB
Well-Known Member
Something a bit like this, maybe: Do I need to do anything special when fitting a new diesel lift pump? ?
Yes, a compression test is on the 'to do' list, but to one as ignorant as I, it seems unlikely to have developed a sudden, unnoticeable, compression problem between running beautifully, and starting easily first time, on the Wednesday, to a no-start on the Friday (and still no start a whole week later).
No decompression levers (as far as I'm aware!) on the old BMCs.
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Bilgediver
Well-Known Member
That crossed my mind too. There is a definite sequence to bleed the system. If there is any air in the fuel system between the fuel tank and the injectors it won't start. FULL STOP!
Too true. The Injector pumps have to generate an enormous pressure and any air in them then it just compresses. In fact on rare occasions on my MD2b I have had to slacken off the pump delivery valve body in order to release air from the injector pump as the compressing air could not lift the delivery valve. An inherent fault in the design of certain valves apparently.
coopec
N/A
There's plenty of video clips on how to bleed the fuel system on a diesel engine
lynallbel
Well-Known Member
NealB
Well-Known Member
Please: can we stick to bleeding fuel problems, rather than petty squabbles about how someone chooses to express themself?
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Bru
Well-Known Member
Have you tried a really big hammer?
