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Distributor Cap and Rotor Replacement? #4695562
03/15/18 11:26 AM
03/15/18 11:26 AM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
Does the Distributor Cap and Rotor need to be replaced? My 290k miles car has original distributor cap, rotor and wires and runs strong without any problems. Would I see any benefit changing those items even when my car is running perfectly?

Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695568
03/15/18 11:31 AM
03/15/18 11:31 AM
Joined: Jun 2003
Posts: 10,419
Illinois
javacontour Offline
javacontour  Offline
Joined: Jun 2003
Posts: 10,419
Illinois
Doubtful the originals are on this car. Unless you've owned this car since it was purchased new, those items have probably been replaced.


network down, IP packets delivered via UPS -BOFH
Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695569
03/15/18 11:32 AM
03/15/18 11:32 AM
Joined: Nov 2006
Posts: 19,887
MA, Mittelfranken.de
Trav Offline
Trav  Offline
Joined: Nov 2006
Posts: 19,887
MA, Mittelfranken.de
Yes they do, like spark plugs they erode causing a wider air gap which requires higher firing voltage. You can have a low misfire count and not even notice it until it increases to a full blown miss, the wider air gap also places additional stress on the coil.


ASE L1, Master. Deutsch Meisterbrief.
Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695583
03/15/18 11:42 AM
03/15/18 11:42 AM
Joined: Dec 2017
Posts: 1,031
US
JLTD Offline
JLTD  Offline
Joined: Dec 2017
Posts: 1,031
US
Yes; when I had a vehicle with this ignition, I usually changed the plugs, cap and rotor at every 2nd spark plug change - each plug change was 30,000 miles.


I'm a thickie; but a 20 has its place.

I use AMSOIL

Hers: 2008 Jeep Liberty 138k, SS 5w30/Amsoil

His: 2015 4Runner 41k, OE 5w20/Wix

Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695588
03/15/18 11:45 AM
03/15/18 11:45 AM
Joined: Apr 2013
Posts: 2,326
The Northeast
mclasser Offline
mclasser  Offline
Joined: Apr 2013
Posts: 2,326
The Northeast
Yep, good idea to replace them. I replaced mine at 180k and noticed a smoother idle and small MPG increase.


2018 Hyundai Elantra VE -- 4K
2013 Honda Pilot EX-L 4WD -- 56K
2002 Honda Accord EX-L -- 211K

Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695594
03/15/18 11:51 AM
03/15/18 11:51 AM
Joined: May 2014
Posts: 3,656
Columbus,Nebraska
Yah-Tah-Hey Online content
Yah-Tah-Hey  Online Content
Joined: May 2014
Posts: 3,656
Columbus,Nebraska
I always replaced the cap and rotor when I replaced spark plugs. Seriously doubt you have the OEM parts. Don't expect a noticeable change if you haven't been experiencing ignition problems.

Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695719
03/15/18 01:57 PM
03/15/18 01:57 PM
Joined: Jan 2004
Posts: 4,142
California
nthach Offline
nthach  Offline
Joined: Jan 2004
Posts: 4,142
California
It's a good idea to change the cap and rotor every other spark plug change. while the terminals do wear and pit due to unavoidable arcing everytime the rotor contact goes over the cap contact for each cylinder and the center contact wears down(it's a carbon nub that's spring loaded like a motor brush) you also have ionized air that has a good bit of ozone in it. If the cap's plastic weakens and cracks or if there's a carbon track on the inside of the cap, it's an ideal condition for a voltage leak.

Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695741
03/15/18 02:25 PM
03/15/18 02:25 PM
Joined: Dec 2017
Posts: 2,301
SE British Columbia, Canada
Snagglefoot Online content
Snagglefoot  Online Content
Joined: Dec 2017
Posts: 2,301
SE British Columbia, Canada
Take the clips off the cap and have a look at each contact and the edge of the rotor. If there are any deposits on the contacts, replace the cap and rotor. I wouldn't bother with the wires unless you feel like updating them or the engine has trouble starting.

Last edited by Snagglefoot; 03/15/18 02:25 PM.

If you want the job done right......do it yourself.
Re: Distributor Cap and Rotor Replacement? [Re: javacontour] #4695785
03/15/18 03:18 PM
03/15/18 03:18 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
Originally Posted By: javacontour
Doubtful the originals are on this car. Unless you've owned this car since it was purchased new, those items have probably been replaced.


I'm the original owner

Re: Distributor Cap and Rotor Replacement? [Re: Yah-Tah-Hey] #4695791
03/15/18 03:21 PM
03/15/18 03:21 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
Originally Posted By: Yah-Tah-Hey
I always replaced the cap and rotor when I replaced spark plugs. Seriously doubt you have the OEM parts. Don't expect a noticeable change if you haven't been experiencing ignition problems.


My dad is the original owner, I don't think he has changed those items

Last edited by Emanuel; 03/15/18 03:38 PM.
Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695795
03/15/18 03:23 PM
03/15/18 03:23 PM
Joined: Jul 2017
Posts: 183
Venezuela, South America
Emanuel Offline OP
Emanuel  Offline OP
Joined: Jul 2017
Posts: 183
Venezuela, South America
Now that I'm starting to remember the car did died some years ago for a ignition problem, I think it does have a new rotor

Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4695869
03/15/18 04:28 PM
03/15/18 04:28 PM
Joined: Feb 2013
Posts: 3,224
Central Virginia
Silverado12 Offline
Silverado12  Offline
Joined: Feb 2013
Posts: 3,224
Central Virginia
FWIW I always replaced these parts at 60K miles. Never noticed a difference in how it ran, though. I wouldn't go over 100K miles.


12 Chevy Silverado ext. cab LS, 2WD 4.3 auto
18 Mustang GT 5.0 auto
07 Harley Dyna Street Bob 96 c.i. 6 sp.
00 Mustang GT auto
Re: Distributor Cap and Rotor Replacement? [Re: Emanuel] #4696006
03/15/18 06:59 PM
03/15/18 06:59 PM
Joined: Jan 2010
Posts: 441
Los Gatos, CA
JeffKeryk Online content
JeffKeryk  Online Content
Joined: Jan 2010
Posts: 441
Los Gatos, CA
Replace them with quality parts. I like OEM.


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