Technical Grande Punto Tjet - Spark plug change

[everson38]

Hey guys

Hope every one keeping well.

I have a Grande punto 1.4 tjet 2009 and I want to change the spark plugs.

I've read that it is best to remove the entire rail all together and the four plugs togethe to avoid snapping. Can someone show.me.how you remove the rail as cannot seem to see how to do it.I've. Attached pictures of my engine. Ps if there are any other tips I should look out for please.feel free.to share.

 

[Bernievarian]

Hi Emmerson,

you don't have to remove all in one piece.

Release (lift) the little yellow clip and pull-off the connector. The coil is held by a single screw, undo it and the coil will come by a slight pull.
You may disconnect the phase sensor (between cyl. 3&4) and the grounding lead to ease access to the coils screws...

BRs, Bernie

 

[everson38]

Hi Emmerson,

you don't have to remove all in one piece.

Release (lift) the little yellow clip and pull-off the connector. The coil is held by a single screw, undo it and the coil will come by a slight pull.
You may disconnect the phase sensor (between cyl. 3&4) and the grounding lead to ease access to the coils screws...

BRs, Bernie

Thanks again Bernie. Knowing it all and sharing it all. I'll give it a go in a couple weeks as plan to change them then. [emoji1]

 

[everson38]

Thanks again Bernie. Knowing it all and sharing it all. I'll give it a go in a couple weeks as plan to change them then. [emoji1]

Can anyone tell me the torque specs in Nm for a tjet spark plugs please.

 

[Ben D]

Remove all the bolts securing the rail then do as Bernie says. Undo all the below clips attaching rail to coils and also undo the connector at the right hand side of the rail. Gently work each clip off its coil and withdraw rail. The reason you must remove the rail is to prevent damage to the connections. There is not enough slack to pull the clips off the could without taking the bolts out.
You also need to undo the connector on the cam sensor.
Torque settings as in Haynes by I just nip up and tighten a little more as my torque wrench won't go that low.

Cheers

Ben

 

[everson38]

Remove all the bolts securing the rail then do as Bernie says. Undo all the below clips attaching rail to coils and also undo the connector at the right hand side of the rail. Gently work each clip off its coil and withdraw rail. The reason you must remove the rail is to prevent damage to the connections. There is not enough slack to pull the clips off the could without taking the bolts out.
You also need to undo the connector on the cam sensor.
Torque settings as in Haynes by I just nip up and tighten a little more as my torque wrench won't go that low.

Cheers

Ben

Hey Ben in the.pics I posted can you.point out where this cam sensor connector is I need to disconnect ???

 

[Ben D]

Only other connection on top of engine that is not the earth point. Above 3rd coil from right, this will need to be disconnected to allow rail to be moved towards front of car so that connectors can be removed from coils without stressing loom.

Cheers

 

[u33db]

In your second picture it'll be the connector directly above the second coil in from the right i'd expect

 

[Ben D]

In your second picture it'll be the connector directly above the second coil in from the right i'd expect

Thanks, I meant third from left. Not enough coffee yet

Ben

 

[u33db]

Well technically we're both right - it'd be left if he was sitting in the car, right if standing over the engine lol

 

[everson38]

Cheers guys. I post pictures later on and let you know how I got on. Hopefully no horrible surprises

 

[everson38]

Hey guys.

Just showing the pics if me changing my spark plugs. Went pretty much to plan, only issues were:

1) IF you look in picture I had to remove this rail that sits behind the coil pack to get more room to remove rail bolt. Not sure what it is (if someone knows please let me know)

2) When I was taken out plug with spark plug socket the rubber grommet that was inside the socket kept coming off and remaining on the ceramic part of the spark plug. - If.anyone has had.this and have a way to deal with it let me.know below lol.

 

[Ben D]

Cool,

Fairly straightforward then. To deal with the rubber bit, either put some masking tape around the outside of the rubber bit or buy a decent plug socket!

Cheers

 

[everson38]

Cool,

Fairly straightforward then. To deal with the rubber bit, either put some masking tape around the outside of the rubber bit or buy a decent plug socket!

Cheers

Also looking in my service books and it says to change spark plugs at 18k / 36k / 54k / 72k / 90k. ???<br />
<br />
Is this correct as it seems very frequent? What do other people do it around

 

[aurick86]

Yes, that is the correct interval for the spark plugs on the T-jet. 18k miles or 30k km.

Although i have personally seen a t-jet at 70 k km still running the original spark plugs and the owner only replaced them because they got wet (petrol) one morning when it didn't start.
The spark plugs didn't have any visible were on them ... only normal combustion deposits...( they could still have micro cracks in the ceramic insulation)

Although they are pretty expensive ~50 euro /set, in the long run they are a important maintenance item, and 7-10 sets in the life of the car really isn't that expensive.