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Bleedin' diesels
Benzine - 22/11/10 at 08:25 PM

I made a thread a few months ago about a saab 93 2.2TD that has seized glow plugs. I've had the cylinder head off and got them drilled out and refit the cylinder head with a new gasket, glow plugs, cam sprocket bolt and upper timing chain guide bolts (as per haynes manual) I've reconnected everything and filled fluids up and now it won't start.

In the haynes manual it says the fuel system is self priming and you need to turn the engine over for 10 seconds, let it rest for 5, then turn over for 10, repeat... but it's still not starting. Could there be loads of air trapped still, I've had all the fuel lines in the engine bay out. I'm wondering what to do next. Also i don't know how fast it should be cranking over, I charge the battery for a couple of hours on trickle charge then crank it over and it's pretty much flat after a couple of minutes cranking (with breaks to go easy on the starter) New battery needed?

FANX

[Edited on 22/11/10 by Benzine]


steve m - 22/11/10 at 08:33 PM

I had a similar problem on my mondeo tdci

i basicly filled up the fuel system from the engine end using a funnell and some fuel hose having taken out the schaeder valve. also crack open one injector (mine is common rail) and let fuel out

it was a bit of a messy (diesel !!!) job, but once the valve was put back, it started first time

Steve


Benzine - 22/11/10 at 08:43 PM

Cool i'll give that a go tomorrow ^_^

Did you like my thread title? It took me 12 hours to think of it and I had a headache afterwards but i think it's worth it


steve m - 22/11/10 at 08:44 PM

Muppett !!!!1


yes, very bleedin good!!!


speedyxjs - 22/11/10 at 09:07 PM

quote:
Originally posted by Benzine
Did you like my thread title? It took me 12 hours to think of it and I had a headache afterwards but i think it's worth it


That took you 12 hours????

Have you tried cracking the fuel lines or removing the leak off pipes and turning it over to see if fuel is coming out?


JoelP - 22/11/10 at 09:07 PM

last time i couldnt get a diesel bled, i just dragged it for 5 mins in gear. Soon sorted it! Dont take my word for it though, id hate to be responsible for blowing you motor up


Davegtst - 22/11/10 at 09:26 PM

Do not crack common rail diesel injectors. They are under such high pressure you
could get seriously hurt.

Does it have the vauxhall engine in it? If it does there is an electric pump in the tank that will prime the system when you turn the ignition on. To check this disconect the fuel feed pipe at the engine and put it into a can, turn the ignition on an see what happens. If i remember correctly the pump will prime for about 30 seconds so make sure you have a big enough can.

[Edited on 22/11/10 by Davegtst]


steve m - 22/11/10 at 09:43 PM

i only cracked the common rail while manuely primming
once happy, or showing fuel seapage retightened it


Davegtst - 22/11/10 at 09:46 PM

Fords can be a bitch to prime as they don't have an electric pump or manual squeezy pump. A squirt of carb cleaner down the intake pipe can get them going if they aren't too air locked.


hicost - 22/11/10 at 10:12 PM

Spray some easy start in the air intake, not much but a good squirt.

That will run the engine and should prime it at the same time. Works great to get you out of trouble if you have an injector leaking back.

James


Benzine - 22/11/10 at 10:25 PM

quote:
Originally posted by Davegtst


Does it have the vauxhall engine in it?



Not sure. It's got GM stamps on it...


Benzine - 22/11/10 at 10:26 PM

quote:
Originally posted by Davegtst


Does it have the vauxhall engine in it?



Not sure. It's got GM stamps on it...


Benzine - 22/11/10 at 10:26 PM

quote:
Originally posted by Davegtst


Does it have the vauxhall engine in it?



Not sure. It's got GM stamps on it...


ashg - 22/11/10 at 10:57 PM

it will be a 2.2 vauxhall dti. and your problem is an airlock in the mechanical fuel pump

here you go

do this (compliments to celes on the vauxhall forums)

Common problem on diesels after fuel filter change and since the DTi's only have 1 pump they're that bit more difficult to start after a service.
What's happened to me is that the car started right up and ran OK. I then went in to wash my hands and have a drink and when I came back it wouldn't start! Blooming thing sucked in air instead of diesel!

Here's what you do if your DTi (or any other diesel for that matter) refuses to start after a fuel filter change.


For this job you will need a socket 10 to remove the engine cover and these babies, size 8 and 17:




After you've removed the engine cover locate the boost sensor:




It's held by a size 8 bolt on the back. Remove the sensor carefuly not to drop the bolt or sensor.

After you've done this, locate the fuel line that goes into the cylinder number 4.




Untight it using the spanner size 17. Now you'll need a hand. Ask a mate to crank the car while you watch the fuel line. When diesel starts to drip out tight it back and put the boost sensor back in place. Try to start the car again...It should start quickly

[Edited on 22/11/2010 by ashg]


bimbleuk - 23/11/10 at 09:13 AM

Would it be any help to put a manual primer (from a scrap car maybe) in the supply pipe if there's no primer pump? I only ask because I changed the glow plugs on my admittedly aging Peugeot engine at the weekend and noticed a perished pipe. After replacing the pipe I had to prime the fuel line which was easy with the hand primer but still needed to give it a squeeze when turning the key to get diesel through the pump.


rusty nuts - 23/11/10 at 09:16 PM

Use the proper tool ! Sealey tools do one for not a lot of money

[Edited on 23/11/10 by rusty nuts]