Did spark plugs last night. 03 5.7

Disclaimer: Links on this page pointing to Amazon, eBay and other sites may include affiliate code. If you click them and make a purchase, we may earn a small commission.

Farmer888

Member
Joined
Aug 6, 2018
Posts
55
Reaction score
21
Location
ontario
Ram Year
2003
Engine
5.7 hemi
Asked about doing spark plugs on here a long time ago but never got around to it, I know they're supposed to be done every 30,000 miles/ 48,000 kms or close to that.. have Had the truck for 82,000 kms and who knows how long the plugs were in there before.
Anyways, The job took me a long time but took a few breaks etc. Drivers side behind brake booster was obviously the hardest part. I don't have the plastic "hemi hat" or the factory airbox so didn't have to remove those.

I ended up taking the plastic inner wheel well/fender out and the tire off to access the drivers side.

Here is a pic of the plugs

20191212_065058[1].jpg
 

HemiLonestar

Senior Member
Military
Joined
Jun 1, 2012
Posts
6,075
Reaction score
3,154
Location
MD
Ram Year
2016
Engine
5.7 hemi
Yeesh....that's why they're supposed to be changed every 30k lol...bet new ones made a noticeable difference.
 

Karlsweg

Senior Member
Joined
Nov 10, 2017
Posts
1,025
Reaction score
949
Location
SW Florida
Ram Year
2007
Engine
5.7 hemi
Bet it runs a lot better now lol. Hope you didn’t drop them in closing the gap on the new plugs.
 
OP
OP
F

Farmer888

Member
Joined
Aug 6, 2018
Posts
55
Reaction score
21
Location
ontario
Ram Year
2003
Engine
5.7 hemi
No didn't drop them in, used the plug wrench to lower them in and hand tighten. Yeah Next time I'll change them earlier haha. The plugs that were in there were champion 3570 which appear to be platinum, I used champion copper core like factory.

Truck definitely feels smoother but to be honest it wasn't really running that bad with the old plugs surprisingly. It did have a few hard starts though recently that pushed me to make time and do them.
 

Redtruck-VA

Senior Member
Joined
Jun 29, 2010
Posts
5,864
Reaction score
984
Location
Virginia
Ram Year
2003 & 1989 D250 RWD
Engine
Hemi-5.7, 5.9 12v & 24v diesel
If you measure the gap, subtract .044" from it. For every thousandth generally equals 2000 miles.
Example. .065-.044 = .021
21 x 2000 = 42000 mi
Sounds like the old girl needed some luv... how do the high tension wires look?
 

Marley

Senior Member
Joined
Feb 20, 2019
Posts
389
Reaction score
274
Location
VA
Ram Year
2004
Engine
5.7
Yeah, it's not an easy job.
I actually had neck spasms after I got done.

Some idiot put E3's in my Hemi and it didn't like em'.
 

turkeybird56

Military Vet 1976-1996 Retired US Army
Military
Joined
Aug 2, 2018
Posts
19,611
Reaction score
44,786
Location
Central Texas
Ram Year
2019 Bighorn, 4 X 4, 3.21 rear, Bright Flame Red Pearl Coat, Mopar tonneau cover,Westin Bed rug
Engine
Hemi 5.7
Hope U verified the gap before installing. U know, all these pre-gapped plugs. They R usually good, BUT there is always Dat (1), Just Saying...
 

Redtruck-VA

Senior Member
Joined
Jun 29, 2010
Posts
5,864
Reaction score
984
Location
Virginia
Ram Year
2003 & 1989 D250 RWD
Engine
Hemi-5.7, 5.9 12v & 24v diesel
Its a easy mod. The hydroboost unit can be found on ebay and Rockauto. The hardest part for me was trying to find the right hoses. After buying a couple and still not happy with them I carried the ends I needed and had custom hoses made locally. Weedahoe did a great write-up years ago that I followed. Basically it is a 1600psi system. Pump pressure goes to the hydro-boost unit, then to the power steering rack and pinion, then to the cooler and back to the reservoir. There is also a low pressure return from the hydroboost unit that "tee's" into the reservoir return from the cooler. Years ago I converted to small rear brakes and installed the hydroboost to improve stopping power. It's a good mod IMO..
 

Karlsweg

Senior Member
Joined
Nov 10, 2017
Posts
1,025
Reaction score
949
Location
SW Florida
Ram Year
2007
Engine
5.7 hemi
Its a easy mod. The hydroboost unit can be found on ebay and Rockauto. The hardest part for me was trying to find the right hoses. After buying a couple and still not happy with them I carried the ends I needed and had custom hoses made locally. Weedahoe did a great write-up years ago that I followed. Basically it is a 1600psi system. Pump pressure goes to the hydro-boost unit, then to the power steering rack and pinion, then to the cooler and back to the reservoir. There is also a low pressure return from the hydroboost unit that "tee's" into the reservoir return from the cooler. Years ago I converted to small rear brakes and installed the hydroboost to improve stopping power. It's a good mod IMO..

Thanks for the info.
 
OP
OP
F

Farmer888

Member
Joined
Aug 6, 2018
Posts
55
Reaction score
21
Location
ontario
Ram Year
2003
Engine
5.7 hemi
Wires looked ok but a couple coils are looking rusty, Runs good though. I like that Hydro boost brake mod! Does it make the brakes noticeably stronger?
I did check the gap on the new plugs and they were all good.
 

Redtruck-VA

Senior Member
Joined
Jun 29, 2010
Posts
5,864
Reaction score
984
Location
Virginia
Ram Year
2003 & 1989 D250 RWD
Engine
Hemi-5.7, 5.9 12v & 24v diesel
IMO, if you have tall/heavy tires or are running small brakes you need to be using hydroboost.
 
Top