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Replacing glow plugs - Grand Scenic

16K views 9 replies 5 participants last post by  fezzer1 
#1 ·
Hi, I have been quoted £130 to replace one glow plug in a Grand Scenic 1.9Dci 05 plate. The garage said it takes about 1 1/2 hours to do - hence the cost. I can get 4 new glow plugs for approx £40, do I need a special tool to remove the plugs and are they easy to access / replace? :confused:

Alan
 
#2 ·
You need a long hex socket to fit the plugs. A 3/8" socket set is better than a 1/2" set as slightly slimmer sockets which is better for access. You can easily get into trouble if you apply brute force when unscrewing the plugs. They do easily snap off making the job much bigger. I slightly tighten before releasing. Release just a few degrees then tighten a wee bit applying minimal force. I keep doing this a few times until I can release the plug a greater angle with ease. It is a motion similar to tapping threads.
 
#3 ·
Book time for changing all the glow plugs is 0.3 of an hour,God knows where they got 1 and half hours from!.:eek:

As said above,they can give problems and if the heating element has expanded then they will break off no matter what you do.If this happens then it makes the job much,much more expensive as the head has to be removed to get the broken end out.:eek:
 
#5 ·
They are easy to get to when you have removed various components required for access. Any mechanically minded person can do them with ease. Not recommended if for those that are clumsy. I would renew all four while at it.
Disagree with Lagdti regarding expanded heat element. Glowplugs get stuck because soot, oil and other combustion deposits gets sintered between heat element and bore where there initially is a gap. The procedure I explained above breaks down the bond of the sintered material making it possible to unscrew the glowplug applying minimum torque thereby removing it with minimum risk of snapping it off.
The workshop mechanic may snap it off as well and charge you for having to remove the head to get it right claiming it was stuck because of an expanded heat element which is all rubbish.
 
#8 ·
Haynes manual £15.50
4 Glowplugs £33.50
Chicken Tikka kebab £4.00 (use of mates tools)

Changing 4 glowplugs on your own - Priceless

The 1st one ( hardest to get at ) was a doddle.

2nd one came out but the new plug (and even the old one ) wouldn't go back in :confused: so that took two of us to put in. One pressing the plug in place and one using an open ended spanner to screw it in.

3rd one felt tight coming out, as though it would snap. This is where my mate was happy to leave me to undo it. Sprayed a bit of WD40 and got it out by screwing in a smidge and then unscrewing a turn or two - and repeating. When I got it out, it looked like it had been put in using a hammer and chisel (not caused by me either).

4th was a doddle as well.

Total length of time 1 hour 20 mins. That was due to trying to get the rocker cover off (I think thats what it was called), messing with 3rd plug and then getting the cover back in place ( I actually used a lump hammer and screwdriver - probably not recommended :baseballbat: but a bit of brute force was needed)

I now know that when they need replacing again, I will do it myself, cos they should come out easily due to the copper grease I applied to the threads. Hopefully.

Anyway, I am happy again now :d

Fezz :cool: :lager:
 
#10 ·
You should get a warning on your dashboard saying "check injection" but I believe this could be caused by a few faults.

This warning will come on even if only one of the plugs need replacing, but it is best to change all 4 at the same time, rather than taking them out and testing each one to see which one it is. Only for another one failing a month or two later.

HTH

Fezz
 
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