Check your plugs

[StoneColdBlue22]

Hey all, I noticed recently that I was having some vibration at idle. I decided to pull the plugs to take a look, driver side came out fine, but passenger side were pretty loose, looser than i would have liked and the threads seem to have carbon or oil coking. Needless to say I changed them for some bosch 1 step colder while I was at it.

 

[Jeppo]

Mileage?

 

[StoneColdBlue22]

15k

 

[Sgt1411]

15k

Did the vibration at idle go away with the Bosch plugs installed?

I always thought that issue was fuel quality?

 

[StoneColdBlue22]

Did the vibration at idle go away with the Bosch plugs installed?

I always thought that issue was fuel quality?

The issue went away completely, idle feels better

 

[ARC]

The issue went away completely, idle feels better

What Bosch plug model did u go with?
Thanks

 

[StoneColdBlue22]

What Bosch plug model did u go with?
Thanks

 

[StoneColdBlue22]

What Bosch plug model did u go with?
Thanks

The rears can be alittle tricky, make sure you have various lengths of extensions and a few swivel adapters

 

[ARC]

The rears can be alittle tricky, make sure you have various lengths of extensions and a few swivel adapters

Oh yeah, I heard the passenger side was a nightmare to work on.
I've been getting my use out of the factory ones.
Been running an E50 tune and so far no issues with stock plugs.

 

[StoneColdBlue22]

Oh yeah, I heard the passenger side was a nightmare to work on.
I've been getting my use out of the factory ones.
Been running an E50 tune and so far no issues with stock plugs.

With the right equipment it isn't as bad as ppl make it out to be, should be a nice 2 hour install from start to finish

 

[TMac]

I certainly miss the old days. At one time on one of my V8 cars, I could change the plugs, install new points, condensor and distributor cap in under 20 minutes. Another 5 to do the dwell meter to adjust the points and set the timing with a light. Of course, one needed to do that every 5k miles or so!

 

[GearHead_1]

I certainly miss the old days. At one time on one of my V8 cars, I could change the plugs, install new points, condensor and distributor cap in under 20 minutes. Another 5 to do the dwell meter to adjust the points and set the timing with a light. Of course, one needed to do that every 5k miles or so!

I'm guessing that one wasn't a '70 Mach 1 with a 428 CID in it.

 

[UNBROKEN]

At least you went with the right Bosch plug…too many people wasting money on NGK 6510’s for a colder plug and these 3.0’s hate them.

 

[F=MA]

My old 1972 Chevelle SS454 with Hooker headers and the factory Air Conditioning housing made for some interesting homemade tight clearance spark plug sockets and crows foot header bolt attachments. Don't forget you can usually get the spark plugs started by using a chunk of vacuum hose pushed over the spark plug wire end of the spark plug and then pull the hose off and finish the install with the appropriate ratchet setup if space permits.

 

[mwinn]

I certainly miss the old days. At one time on one of my V8 cars, I could change the plugs, install new points, condensor and distributor cap in under 20 minutes. Another 5 to do the dwell meter to adjust the points and set the timing with a light. Of course, one needed to do that every 5k miles or so!

Still have all the equipment in good working order. Maybe should donate to a museum. Timing light has got to be 45-50 years old. Same for dwell/tach meter.

 

[Cdubya]

Just changed mine today. These are after 60k miles. Left side with a little more burnt appearance but nothing too bad.

Stock was Motorcraft SP 578. Now replacement listed as SP 594. Both iridium. The 594 were all pre-gaped.

 

[StoneColdBlue22]

At least you went with the right Bosch plug…too many people wasting money on NGK 6510’s for a colder plug and these 3.0’s hate them.

ive always used bosch, they make tons of aerospace and oem components. ive run them in 3 of my past 4 vehicles and have never had a problem.

 

[UNBROKEN]

View attachment 16066
Just changed mine today. These are after 60k miles. Left side with a little more burnt appearance but nothing too bad.

Stock was Motorcraft SP 578. Now replacement listed as SP 594. Both iridium. The 594 were all pre-gaped.

What’s that gap? Looks rather large in the pic.

 

[SimonsGTS]

Still have all the equipment in good working order. Maybe should donate to a museum. Timing light has got to be 45-50 years old. Same for dwell/tach meter.

Same, I still have a working dwell/tach and a portable ignition scope. I can't just throw them away!

 

[Cdubya]

What’s that gap? Looks rather large in the pic.

Didn't measure the old ones. Spec says they should be 0.028-0.030 in. All the new Motorcraft SP 594 measured in that range