View Full Version : 02 chevy 8.1 spark plugs

08-12-2007, 09:47 AM
got a 02 chevy silverado with a 8.1l was wondering about the spark plugs, are those magneto's on the valve cover? looks kinda amazing to me! all look good except 2 of them that look bran new, got the truck 2 months ago and finally got a chance to go over everything. boy is this thing a monster to! 8.1 gotta love it. gas milage is not all that bad either, like 8-10 around town 10-14 highway, pulling trailer 8 mpg..... still not bad alot better then our older dodges!

anyone have the 8.1 in there chevy? what seems to be the big problem with them? i do not have any problems currently, just asking for future reference.

Jacob's Yardworks LLC
08-12-2007, 01:36 PM
Just got a new truck about a month ago with the 8.1 and allison and like you said its a beast, i love it. Havent had any problems but its only got 53,000 miles and its an 01. A for gas milage, about 6-8 pulling every day and about 12 just highway driving unloaded. good luck!

08-12-2007, 02:39 PM
jacob, is the 6.0 any good? hear its about the same as mpg as the 8.1 BUT of course the 8.1 is for hauling

Jacob's Yardworks LLC
08-13-2007, 05:13 PM
yeah the 6.0 is an awesome truck too and it gets about 9-10 hauling. they both pull trailers great but the 8.1 has alot more power. if it was between the 8.1 and 6.0 i would defenitly go 8.1 because the millage isnt a whole lot different between the two but you get a lot more power. what do you haul with yours? sorry im no help on the spark plugs lol

08-14-2007, 06:56 AM
skid steer, mowers normal crap

going to go to dealer and ask about the spark plugs advanced dont know nothing lol

08-14-2007, 08:17 AM
Sounds like each plug has it's own coil. Common enough with modern electronic ignitions. I would ask the dealer about it if you have specific questions, or search a chevy truck forum.

08-24-2007, 01:03 PM
whats the best chevy forum site?

Jacob's Yardworks LLC
08-25-2007, 06:52 PM

08-25-2007, 09:43 PM
Have an 04 2500HD with the 8.1 and allison and about to hit 90k on it. No problems with the engine or trans (knock on wood). Have been through one instrument cluster, two speedometers, two alternators, gave up after three tailgate door handles, heating coil just went but had mechanic bypass it, and my A/C decides to stop working after awhile until I can stop and restart the car.

Other than that :dizzy: :dizzy: :dizzy: its been fine.

08-25-2007, 11:25 PM
They don't make the 8.1 anymore.:cry: I wanted the 8.1 when i bought my 07 but i quickly found out it doesn't exist.