2001 S60 T5 burning coil issue

rmargoli · Post by **rmargoli** » 13 Jul 2015, 07:01

OK, haven't yet opened the coil cover but my mechanic is saying the following:
1. The coil is melting from top down
2. Before the coil was melting he check engine compression and there was no leaking in compression so he thinks that the engine head is not cracked
3. He said that the car electritian service guy checked the grounding before he tested the ECM unit

Now, i do not know if all has been done. WIll open the cover and see if the coil is melted top down again

rmargoli · Post by **rmargoli** » 13 Jul 2015, 07:02

and maybe i need to change the service center

draser · Post by **draser** » 13 Jul 2015, 07:20

Can you remove plug and see if side electrode is bent to touch center, post a pic also?

rmargoli · Post by **rmargoli** » 13 Jul 2015, 08:43

Never removed a plug, allways a first time...

Post by **abscate** » 13 Jul 2015, 11:05

They do ground through the 10mm (M6) bolt that holds on the coils, so if that bolt is loose/missing/dirty that could contribute to a bad electrical connection.

rmargoli · Post by **rmargoli** » 18 Jul 2015, 03:50

rmargoli · Post by **rmargoli** » 18 Jul 2015, 03:53

As you can see, the burning of the coil is top down, even the connector has been burned and one of its legs even changed its form when i extracted it out of its coil housing

Post by **abscate** » 18 Jul 2015, 04:16

It looks like the red white wire is clipped. What's going on there?

I agree that is a top down meltdown.

rmargoli · Post by **rmargoli** » 18 Jul 2015, 04:20

Hi

I do not know the reason for which the red/white wire is clipped, i would guess it came that way when the harness was replaced as that wire is not going forward on the harness itself

Is that an issue? how many wires should there be to each of the coils?

I need to check with the electrition who replaced the harness

Post by **abscate** » 18 Jul 2015, 04:40

I think there are three to the coil, so it's very likely that the problem is one of the wires is misconnected. I'll guess the 12vDC is going to the trigger transformer ground.

My 1999 colored wires are different but that may be a model year change.

I think we are close to the solution.,,,Behatsclacha!!

I made some resistance measurements in this thread

https://www.matthewsvolvosite.com/forums ... il#p325109

2001 S60 T5 burning coil issue

Re: 2001 S60 T5 burning coil issue