glowplug replacement

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Sep 24, 2014 | 10:31 AM

kev03

Thread Starter

Senior User

Joined: Aug 2007

Posts: 326

Likes: 3

From: stark county

glowplug replacement

I have an 03 EX with a 7.3l I bought new valve cover gaskets and glowplugs would like to know if I should replace all the glowplugs or just the one that is bad? Thank you in advanced for your help!

Sep 24, 2014 | 11:43 AM

mrv8outboard

4wd High

Joined: Mar 2005

Posts: 9

Likes: 0

I would replace them all, why open up the engine twice. Also test the new glow plugs before you install them. I have had new ones fail out of the box. Do it once do it right.

Sep 24, 2014 | 12:05 PM

Pikachu

Lead Driver

Joined: Jun 2004

Posts: 6,303

Likes: 576

From: Amarillo, TEXAS!

And I'm sure you've probably already heard, but only use Motorcraft GPs. Under no circumstances should you ever use Autolites.

Sep 24, 2014 | 08:20 PM

cjgray1974

More Turbo

Joined: Nov 2012

Posts: 727

Likes: 1

From: Chariton, IA

Another vote for replacing them all, If one is bad the others could quit at any time. Also use Motorcraft, Riffraff has a great price on them.

Sep 24, 2014 | 08:47 PM

hydro man 17

Posting Guru

Joined: Oct 2012

Posts: 1,910

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From: Hat Creek Ca

Might as well replace the UVCH harness while you are in there as well. Same as above, Clay has the best prices and they are all Motorcraft. They also have built in retaining clips so no .50 mod needed but it can't hurt anyway if you choose.

Sep 25, 2014 | 07:36 AM

danskool

Go Bills !

Joined: Jan 2008

Posts: 2,778

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From: Buffalo, NY

Another Vote. Change all 8. and 50c mod
Also check torque on injectors and rocker pedistals.

You will be 75% of the way through a new cac intercooler boot change also. Order up a kit !. :0