Hey....Well I have a 91 Camaro RS 305 TBI..and I think It's time to change the plugs. I'm looking into getting the Bosch Platinum 4 plugs. But getting to the actual plugs to replace them looks very difficult. Maybe it's just because I'm a newbie to Camaros...but damn I have no idea how I'm supposed to reach those things to change them. Any help? Thanks

 

I'm by no means here to dis-courage you BUT, have fun.....

I spent 10 minutes looking at that thing, and spent the next 15 minutes driving it to a shop to have it done...

Do a search and you can find tips from some brave souls who have done it with all smog eauipment and A/C in the car....

P.S. took them about 3 hours their first time.....

 

first time I did my plugs I learned a few things...

USE GOOD JACKSTANDS or drive on ramps.

Plugs 1 3 5 come out easily from the top.

7 2 4 6 8 Have to be taken from underneath.

Exhaust shields are sharp, ask me how I know lol

Plugs 6 8 require you disconnect the battery...

Ask me how I know that one too...

Plug 7 is probably the most awkward to get back in. For the life of me I spend a good 5 mins trying to get the threads to catch. Doesn't help that I'm doing it by feel.

Plugs 4 and 6 are done by feel for me too.

Careful with the fan switch, its brittle already as is and breaks easily, although I didn't realize this until my 3rd go at changing plugs.

Use anti sieze on threads, use dielectric grease on the inside of the boots.

All told it takes me <1hr to swap plugs.

 

Well, it been a while since I had to do this with all the smog crap and stock manifolds on the car. Do you still have your smog pupm and AIR hoses? A/C??? Stock exhaust manifolds??? If I remember correctly all of them are relatively easy to get (I'm talking relative to changing the plugs in a Beretta Sport with the 3.1 if you've ever done that... if not, don't ever attenpt it ) at except 7, 8, and possibly 6 which are much easier to get at from under the car.

Do you really think that the Bosch Platinum +4s are really worth it. IMO they are not. Most people here just run Delcos at .035, .040, or .045 depending on their ignition. I've had the most luck with Delcos and have never really seen the gains claimed by the more expensive plugs.

Later,
Harry

 

My first time it took me about 2 hours, but most of that is due to the original 12 years old plugs where practically mated to the engine. I didn't have to disconect the battery or anything, but I did have to get about have of them from underneath.

And as for the gimmick plugs, stay away from them. Go with AC Delco Rapidfires.

-The Gunny

 

it took me around half an hour the first time i did them on my camaro but having worked on gm's before helped alot. Jsut raise the car and take your time getting them out. I second not using the plus-fours or split fires or anything like that. I like bosch's regular platinums and have gotten more then 60k out of a set but the ac-delcos are just as good as any. Make sure you gap them before install.

 

DO NOT GET THOSE PLUGS,
I repeat, do not get them. I ran them for about a year and they fouled really bad. This was with only like 2000 miles on them. They do not work well with the GM HEI ignition. They work well in other cars but the GM HEI ignition is a bit to much for them to handle and the platinum doesn't conduct very well. They foul up to quick. They will seem great at first and you will have a nice crisp throttle response but after awhile your car will hesitate on off throttle acceleration and it will stumble at idle. I switched to the factory replacment AC delcos and the car ran soooooo much better. Just save your money man. We aren't working with high compression super output nascar motors here. I will post picks of the plugs once I get home.

 

Thanks shifty for savin me the money

 

My buddy ran the +4's in his 4.6 T-Bird, and only after 5,000 miles he blew one of the plugs clear out of the cylinder and fragged a spark plug wire. It was actually kind of neat, but definately not cool.

 

my opinion Bosch Platinum plugs are great, but someone told me that the +4s run to hot and build up carbon prity fast, so I went with the reguler bosch platinum and they've been wonderful.
Thats been about 2 years(at least 15,000 miles)

 

Replaced plugs with Bosch platinum,took several houres to do that,mostly from underneath the car!
After about 2000mls 3 plugs went bad!!
Again crawling under car,replaced them all by AC RT43 or something(recomended by the drivers handbook that belongs to the car).
Than trouble with the nr 8 plug fouling,time after time!
Found out the original recomandation was no longer valid!!
R44 or R 45,hotter plugs were the way to go!
But than I discovered AC Rapidfire (nr2),again under the car...(you get used to it!!)
Since than,no plug problems!!

 

Do you have to move anything around to get to the plugs from underneath the car?

 

I just did them all from the bottom when I was stock as I remember. Get a friend to drop the wires down from the top and put them on from under the car, they're cake when you do that.

 

Plain old AC Delco plugs work great and last along time. The spark plugs are not a weak link on LO3's. Save the difference and put it torwd a MSD blaster coil.