Glow plugs on a 147 jtdm - Alfa Romeo Forum
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Glow plugs on a 147 jtdm

Hi guys,

I've been so used to petrol cars and servicing them, diesel is a little new to me, I know my glow plugs need changing but obviously never changed any before, are they easy to get out, nothing daft in the way, manifold piping etc? any help is good

Thanks

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Why are you so certain they need changing? Glow plugs usually come out OK and access is easy on these engines but they can snap off and cause serious grief (ie head off).

Keith
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There's a glow plug error msg on the display

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Ah! It could also be the relay so worth checking that out by getting the multimeter out and confirming the problem. If you use penetrating oil first for a few days and use a good fitting tool and take your time then you should be fine. There is no rush if its starting well. May be worth trying to tighten the plugs a tiny bit first before you lean into loosening them. All will almost certainly be OK but worth planning for worse case ie don't do the job the day before you need the car for holiday

Good luck!

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Warming the engine up before you try removing glow plugs always helps... Take a car for a short ride before removing them and they should go out easily. The only thing you need is a deep access socket.

And before refitting the glow plugs back, wait for the engine to cool down. It is not too smart tightening plugs into hot metal. It might go wrong
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Originally Posted by gammakeith View Post
Ah! It could also be the relay so worth checking that out by getting the multimeter out and confirming the problem. If you use penetrating oil first for a few days and use a good fitting tool and take your time then you should be fine. There is no rush if its starting well. May be worth trying to tighten the plugs a tiny bit first before you lean into loosening them. All will almost certainly be OK but worth planning for worse case ie don't do the job the day before you need the car for holiday

Good luck!

Keith
Where do I find the relay?, is it under the steering wheel?

Quote:
Originally Posted by TribesMan View Post
Warming the engine up before you try removing glow plugs always helps... Take a car for a short ride before removing them and they should go out easily. The only thing you need is a deep access socket.

And before refitting the glow plugs back, wait for the engine to cool down. It is not too smart tightening plugs into hot metal. It might go wrong
I've got the tools juts never changed glow plugs before, it's always been spark plugs

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Sorry don't know where the relay is as I've never had to look myself but I'm sure a search on here would give you the answer. Probably easier to just disconnect the plug leads and confirm voltage at the plugs when the key first turned. You could then also check resistance down all the plugs to the block to identify the dead one/s.

Keith

ps remember to use copaslip with the new plugs just like spark plugs
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the relay (control box) is a small black box next to the fuel filter.

I found the only long socket missing out of my set was the 9mm, the one for the glowplug.
Easy job though once I got one.
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Be careful, I had the very tip of some glow plugs breaking off before.

The Glow Plug body comes out Ok, it’s just the Tip that’s stuck in the Head.

Why? How?

The Tip swells/mushrooms after a few years use.

What now, Head off?

No, some say the Tip will pop out if you start the engine.

I rather do it the old fashion way:

Take the Injector of the effected cylinder out, and bring the Piston to the top by turning the engine over with a 19mm Socket and Retched.

Now use a small Punch or Drift and knock the broken off tip into the engine.

Use a Magnet probe or similar to “fish” the tip out of the engine true the Injector hole.

Refit the injector, and the new Glow plug.

Been there, done it, but never got a T-shirt..

With an Alfa itís a bit like with your very first Girlfriend.
Once you found out where everything is and whatís itís used for, life becomes much more fun.
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Thats a good tip. I certainly wouldn't want to be anywhere near the engine if trying to blow a broken tip out by turning the engine over. I bet it would come out like a bullet!!

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it probably wouldn't come out at all, but get buried in the piston or the head...
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(Post Link) post #12 of 12 Old 15-07-11 Thread Starter
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Got them changed by my local while I was at work, he found 2 had failed. 4 brand new Lucas ones fitted, no more error and starts beautifully


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