beaversstonehaven

I was just out looking at my 2016 base C7 Stingray engine and was wondering how is it possible to change the spark plugs especially the rear passenger side? I know they are not due for a change until 100,000 miles and I will probably have a new C7 or C8 by then but I was just curious how it is done. I changed the spark plugs myself on my 2006 C6 and it was a major challenge for me.....some cussing and bleeding of hands involved. I would not attempt the change on the C7. Any insight on how it is possible? Does something have to be removed to get to them? Thanks in advance for your insight.

robert miller

You have to pull the fuse box apart each of the big fuse parts has a good side clip one on each end of it, then you can do any work on the pass side of the lower head like chg out plugs r get to bolts to put a set of headers into the car.Robert

beaversstonehaven

Thank You very much Robert. I don't think I would attempt that. Now I can think about other things.

Patman

I remember people thinking the same thing when I had my LS1 Firebird Formula but after a bit of practice I was able to do it in 45 minutes. Small hands certainly help a lot!

robert miller

Man it is simple have to take out a bolt r two to get it loose then just pull out each of those fuse pods like. Man really if you just look at it will come together really easy for you & also only one way back together. Robert

beaversstonehaven

Thanks again Robert. If I make it to 100k in this car I might just try it. In 7 months I have already put 18,500 miles on this one. I am doing a lot of back and forth driving to Houston to help out my 92 year old Mother. It is good to have a nice car to make the boring drive. I actually look forward to and enjoy the drive in a Corvette! I love my Mom too!

dval

I do the plugs on all my vehicles at least every 5 years just to make sure they will come out . I did my ram truck last fall it has 16 plugs. That took me most of a afternoon and a 6 pack !

c6txvette

Old *** thread resurrected but I changed the plugs on my Z06 yesterday and yes it was a pita lol. My car only had 24k miles but is highly modded and I have a shitty tune that is too rich (fouled out the plugs). Took me about 3.5 hours and a lot of cussing lol.

sTz

It’s a PITA to change plugs in most modern cars due to space restrictions. I remember my dad crawling into the engine bay of some of his ‘70s cars/trucks. You can barely get you arm in there now... Thank goodness most plugs are 100K miles now. It’s very doubtful that I’ll have a car that long, or worry about changing plugs unless mod’ing or tuning.

~Stingray

Ya, those old cars from the 70s and earlier, you could take a nap in the engine bay without fear of rolling into the engine. lol.

Vetteman Jack

Yes, an old thread, but when I was messing with my car the other day, I looked at how easy it would be to change the plugs and was wondering how to get to the rear passenger side ones. Good to know what is involved.

DreamMachine7

Here's the video I used to find out how to do it. Not a lot of videos out there on how to do stuff like this on the C7 unfortunately.


I find they can carbon foul long before 100k miles, especially if the engine is running rich or the previous owner neglected it, ran who knows what kind of fuel or oil through it, ran who knows what tune on it. If you buy a C7, or even any car used, it behooves you to grab a Bluetooth 4.0 BLE OBDII scan tool, plug it in to the OBDII port, fire up an Ipad and check out how the engine is running. You don't want to find out too late that all this time you've had spark knock, misfires, running too lean or too rich a mixture which can damage the engine, or catalytic converters.

c6txvette

i did it 2 days ago without a vid bc I’m old school at 34 haha. It’s a major pain but not near impossible. Remove the fuse block (10 inch socket) for 3 bolts, a 12 or 13 inch socket for the positive and negative cable to the fuse block, remove the coolant reservoir bolts ( just to slightly lift it out the way) it won’t get drained or removed. Once that is done it is fairly straight forward (on the right side). It helps to have a few misc swivel attachments for your 5/8 socket too. To me the drivers side rear was the absolute worse and had me cussing up a storm. I only removed the hose deal that plugs into the brake booster and unplugged the electrical thingy that plugs in there to give me more room. I left the valve covers on and had that side done fairly quickly. It might help too to jack up the front left of the car. Took me all of 3.5 to 4 hours to complete.

DreamMachine7

You should probably disconnect the negative battery cable first, otherwise you'll get a CEL. Not that you can't clear the CEL, but you can prevent getting one in the first place if you want to.

c6txvette

i forgot to mention that was the very first thing I did

Dcasole

As s the others have stated , removing the fuse box is easy and gives you all the room in the world to access the plugs

Dave

Soul per4mance

reviving an old thread. Just completed my first plug change on the c7. Had to go with the NGK’s that came with the supercharger. The video definitely helped because it was nowhere as easy as my old c4 and c5 🫣. For me it was an off and on 2 day job researching how to access some plugs, cussing, twisting, dropping important pieces in the frame and finding the right tools to access the already cramped space.

orca1946

I remember my 70 Pontiac ran pretty good on 7 plugs --- I wonder how my 2019 G S would like it?????? Yikes!

eboggs_jkvl

Ditto

Elmer

Tommy79

Dealer charged me $340 to change one bad plug.... With only 10k miles.