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Old 10-05-2016, 11:09 AM   #1
tgparker
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Default Replacing Coil Packs on my '97 SW1 - What tool to use?

Looks like I might have to replace one or both coil packs on my '97 SW1.

Problem is, none of my wrenches or sockets are thin enough or the right size to get at the bolts that are holding them on....

So what would be the right tool and also what is right size mm socket is the bolt head that's holdiong the coil packs on?

Thanks in advance...

TG
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Old 10-05-2016, 11:15 AM   #2
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

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Originally Posted by tgparker View Post
Looks like I might have to replace one or both coil packs on my '97 SW1.

Problem is, none of my wrenches or sockets are thin enough or the right size to get at the bolts that are holding them on....

So what would be the right tool and also what is right size mm socket is the bolt head that's holdiong the coil packs on?

Thanks in advance...

TG
They are 8mm bolt heads and you should be able to use a 3/8" drive 8mm socket with an extension. The top 2 are really long bolts that hold the plug wires on and the bottom 2 are shorter. On both engines I've removed them from the bottom 2 were problematic. I had one lower bolt break so work the bolt in and out if you hit resistance. The bolt heads easily round off so use a good 6 point socket and ensure that the bolt head is clean and the socket is firmly on the bolt head. I had to use bolt out sockets as someone before me had rounded the bolt heads.
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Old 10-05-2016, 11:37 AM   #3
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

Use a 1/4 drive 8mm socket and extension
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Old 10-05-2016, 11:43 AM   #4
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

Yeah I checked and it looks like 8mm sockets...

My 3/8" drive set is to thick and bulky to get in between the pins.

I do have a 1/4" drive socket and a ratchet, and the socket fits ok, but I am definitely going to need a 2" or 4" extension or even a little longer extension. Perhaps one of those flexi drive extensions might be good for getting around corners those pesky corners.

The bolts don't look that bad, but I'm definitely going to use a lot of PB-Blaster... and let it soak before I do anything...

I agree I can do the two top bolts from the top of the engine but I'll definitely have to go in from underneath to get at the lower bolts...

Thanks for the info...
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Old 10-05-2016, 12:14 PM   #5
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

Be careful when tightening them back up so as not to break them. They're fragile.

Clean up the ground contact points when changing them, bolts/transmission.
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Old 10-05-2016, 12:57 PM   #6
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

I don't recall having problems reaching the lower bolts from above but I had the fan out and the A/C condenser off to the one side both times.
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Old 10-05-2016, 04:32 PM   #7
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

Replaced both CoilPacks ok. The bolts were clean and shiny on the inside...

Engine running a little smoother, but still rough and still getting flashing P0300 code.

I'll clean the plugs once the enigine cools down.

What could be other causes? The CoilPacks were bought off of eBay and they were definitely NOT OEM.

What would be the EXACT match for new CoilPacks, and where can I buy them?

Thanks,
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Old 10-05-2016, 05:56 PM   #8
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

Mileage, compression? There are several ways to have a general misfire; faulty coil wires, spark plugs, poor grounds to the icm, loose power connections to icm, coil packs and pcm, worn rings, burned exhaust valves, dirty throttle body, clogged catcon, egr valve, etc..

Unless you installed a pair of faulty ignition coils, the best test is observing spark jump across coils with all wires removed. Someone cranks the engine (fuel pump fuse removed to prevent flooding while cranking) while you observe spark jump across coils. You're observing crank sensor outputting to run the pcm while the pcm turns on the fuel pump, initiates spark and operates injectors just by verifying spark. If you left the fuel pump fuse connected, you'd have fuel injected into every cylinder - you'd have to remove plugs after cranking to see/smell wet plugs.
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Old 10-06-2016, 12:54 PM   #9
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

I got an AC Delco set off Ebay.
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Old 10-06-2016, 02:44 PM   #10
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Default Re: Replacing Coil Packs on my '97 SW1 - What tool to use?

As F Dryer noted , sometimes apparent 'misfire' can result from sticking or burned valve.

My '97SW2 often misfired until I installed a quality ignition wire set.

A year after that the engine would start/run on three cylinders for about a minute , after which the fourth cylinder would join in. That indicated some sticky valve activity, which was cured by the administration of solvents, in the gas (Techron) and oil (STP Multipurpose MotorTreatment).

Now all cylinders fire initially at coldstart, and I very rarely spend time on the plugs+wires.
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