yanmar b08-3 won't start

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Maxus

Well-known member
Is it worth cycling the glow plugs a few times? Like 3 x 15 seconds, and then run the starter for 15/20 seconds?
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
Is it worth cycling the glow plugs a few times? Like 3 x 15 seconds, and then run the starter for 15/20 seconds?
very often give our Golf two go,s on a real cold morning ... makes for a much easier start
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
very often give our Golf two go,s on a real cold morning ... makes for a much easier start
Yeh I know what your saying, I think we are a bit deeper in that heat and oil though, easy start maybe but not the overall fix.
 
S

sandbags89

Member
and get sun burnt feet ..... sod that .. I'd rather keep the socks on :LOL:

thats right, safety first!

Bit more oil, more heat! But it think we are looking at low compression, it hasn’t been tipped over has it?

as in... its showing more oil and heat, or it needs more oil and heat? nope not been tipped mate

Is it worth cycling the glow plugs a few times? Like 3 x 15 seconds, and then run the starter for 15/20 seconds?

yep given this a shot but no luck

Yeh I know what your saying, I think we are a bit deeper in that heat and oil though, easy start maybe but not the overall fix.

did try easy start and no help. Oddly enough, easy start actually seems to worsen it. When the easy start sprays in it noticeable bogs down the power for a second or so and then speeds back up to its normal attempt of flinging it over.


Had a mechanic over today, mate of my dads. He came and tried everything, everything that i've tried and some of what you guys suggested. Walked away scratching his head also. He's saying the same thing, its getting fuel...injectors work....solenoid works....plugs work... "it should be starting!"
He said compression looks like its good also. Although i suppose its one of those things where its hard to tell by looking, possible it may be a tad low.

I sent the faulty tester back, maybe i'll try get my hands on another compression tester.

The positive of this is that the 2 engineers/mechanics that have come down have done more or less done everything that i've tried. Which means im not an idiot and i've learnt some stuff haha. However, i would much rather them come over, roll their eyes and point out something i missed, and hey presto she starts up 😅 😩
 
M

Monkeybusiness

Well-known member
I’d go with @doobin’s shout and chuck 24v through the starter - see what happens. It’ll spin it over fast and ‘might’ end up firing. Otherwise it’s engine out by the looks of it (and probably still is if it starts with the superjump method to be fair!).
 
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sandbags89

Member
I’d go with @doobin’s shout and chuck 24v through the starter - see what happens. It’ll spin it over fast and ‘might’ end up firing. Otherwise it’s engine out by the looks of it (and probably still is if it starts with the superjump method to be fair!).
how do i go about this....connect a cable to it directly from the battery? I'll have to try upload a photo tomorrow showing how much of starter i can see and what im supposed to clip on to...
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
Ok long shot coming up, the head gasket is gone between the two cylinders, or you have two bent con rods! It’s head off time! Drain all the coolant first.
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
Yes you can try 24v’s to the starter but I wouldn’t advise it, not if you don’t want to melt the regulator, timer relays!
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
Those small starters aren’t built to use 24v’s so you could be buying a new one, and still not have a running engine.
 
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sandbags89

Member
Yes you can try 24v’s to the starter but I wouldn’t advise it, not if you don’t want to melt the regulator, timer relays!

Those small starters aren’t built to use 24v’s so you could be buying a new one, and still not have a running engine.

ah, no thank you! 😅

Ok long shot coming up, the head gasket is gone between the two cylinders, or you have two bent con rods! It’s head off time! Drain all the coolant first.

i'll see if i get a chance tomorrow. So drain the coolant, then off again with the rocker and then the next set of bolts in the image below, and obviously remove anything else obstructing this...

IMG_20220514_163955_LI.jpg
 
V8Druid

V8Druid

do it as well as you can,but learn to do it better
ah, no thank you! 😅



i'll see if i get a chance tomorrow. So drain the coolant, then off again with the rocker and then the next set of bolts in the image below, and obviously remove anything else obstructing this...

View attachment 35673
looks like water pump and all associated gubbins off too :cry::cry:
 
Quattromike

Quattromike

Well member-known
or a damaged/cracked piston ....... tha's a LOT of heavy breathing :cry:
And not a lot of compression by the looks, I'd say either rings or valves gone, could be chunk of head missing between cylinders if it's ally head.
 
Mick-the-fitter

Mick-the-fitter

It’s what I do!
Rocker shaft bolts, water pump, generator adjuster, all head bolts, exhaust manifold, injectors pipes, wiring
 
S

sandbags89

Member
or a damaged/cracked piston ....... tha's a LOT of heavy breathing :cry:

when you refer to the heavy breathing, what is the sign for that. Is that from the air it was pushing out when I removed the rocker cover? Should there be no air escaping like that?

looks like water pump and all associated gubbins off too :cry::cry:
Rocker shaft bolts, water pump, generator adjuster, all head bolts, exhaust manifold, injectors pipes, wiring

😣😫

or a damaged/cracked piston ....... tha's a LOT of heavy breathing :cry:

And not a lot of compression by the looks, I'd say either rings or valves gone, could be chunk of head missing between cylinders if it's ally head.

if its one of these... is it going to be beyond my capabilities? will it be possible to find someone to do this sort of mobile repair?
I'm willing to do everything that i can, hopefully to at least find the problem so that a pro can come in get straight to it, rather than spend ages trying to diagnose whilst im on the £ meter 😅

Going way back to when you let the oil out what did it look like?

just looked like regular used oil, black. Didn't see any foreign bits in there.
 
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