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List Impossible Sparkplug Replacement #5446131 06/04/20 01:31 PM
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borgward Offline OP
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There needs to be a list of cars requiring Engine disassembly or engine removal to replace sparkplugs. First one I encountered was the Pinto re badged as a mustang with V8. You had to unbolt a motor mount and jack up the engine to replace them on one side. Late 70's or early 80's.

Re: List Impossible Sparkplug Replacement [Re: borgward] #5446140 06/04/20 01:43 PM
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TmanP Offline
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That would be a pretty long list... many transverse V6 would fall under that category, for sure. Off hand, two I remember - GM 3800s are very tight, so many people unbolt a motor mount and tip the engine forward. Tthe Sienna's 2GR-FE back plugs are completely hidden; the intake manifold usually comes off to replace them.


2012 Toyota Camry 2.5 60,000 mi
2015 Chevy Silverado LT Z71 5.3 V8 50,000 mi
2010 Toyota Sienna 3.5 V6 200,000 mi
Re: List Impossible Sparkplug Replacement [Re: borgward] #5446150 06/04/20 01:57 PM
Joined: Apr 2018
Posts: 1,861
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Imp4 Offline
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Joined: Apr 2018
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My Toyota 3.0 1MZ-FE required removal of the intake manifold to get to the back plugs. Made for a long weekend for a shade tree mechanic.

Re: List Impossible Sparkplug Replacement [Re: TmanP] #5446153 06/04/20 01:58 PM
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Tman220 Offline
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Originally Posted by TmanP
That would be a pretty long list... many transverse V6 would fall under that category, for sure. Off hand, two I remember - GM 3800s are very tight, so many people unbolt a motor mount and tip the engine forward. Tthe Sienna's 2GR-FE back plugs are completely hidden; the intake manifold usually comes off to replace them.


I've found W-bodies with the 3800 to be pretty easy actually. It's pretty much any GM car with the 2.8, 3.1, 3100, 3400 60 degree v6's that usually require a special tool to tip the engine forward. Unless the 3800 you are speaking of was in a minivan? Those are never easy.

My personal contribution would be my 94 camaro with the Lt1. When it had stock exhaust manifolds (they are above the plugs), AIR injection plumbing, they were pretty tough to get to. My first plug change it was obvious that the #8 plug (passenger side rear) had never been changed, due to the other 7 being a obviously newer AC Delco's. removing the starter and getting it from below the car was pretty much a requirement.

In contrast, now that the emission equipment is gone, has long tube headers, its about a 30-45 minute job.


2012 Regal GS Turbo PP 5w30 90k
1994 Camaro Z28 LT1 355 CI, 430 RWHP PP 5W30 165k
2005 GMC Sierra 1500 5.3 170k
2004 Civic LX M5 190k
2007 Camry 2.4 250k
2016 Victory Vegas
Re: List Impossible Sparkplug Replacement [Re: borgward] #5446155 06/04/20 01:59 PM
Joined: Jun 2003
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Chris142 Offline
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70's chevy monza with a 305.


02 Wrangler Napa high milage 10w40
87 F250 Valvoline 15w40
07 fjcruiser Car lube plus 10w30
Z400 castrol T 10w40
Can am Maveric edge 5w40
57 case tractor Chevron sae30
Re: List Impossible Sparkplug Replacement [Re: borgward] #5446156 06/04/20 02:06 PM
Joined: Jul 2004
Posts: 12,464
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simple_gifts Offline
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Joined: Jul 2004
Posts: 12,464
Buick Rendezvous; after a tuneup and misfire diagnosis, mechanic instructed my friend to "never bring it back"


2004 Prius; 134K; ATM
2007 Yaris 114K M1 ESP 5W-30
2006 B2300;137K;ALM
Re: List Impossible Sparkplug Replacement [Re: borgward] #5446157 06/04/20 02:06 PM
Joined: Jul 2019
Posts: 18
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MacManus99 Offline
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Joined: Jul 2019
Posts: 18
Just did my the plugs in my wifes Escape V6. Once the upper intake plenum is removed, the back plugs are easy to get to. Removing the intake plenum becomes much easier after you do it once or twice, non issue really. Just remember to replace the plenum and EGR gaskets. And try not to break the assortment of 10 year old, 160k miles heat cycled plastic clips. WWF


2016 Chevrolet 2500 - 6.0L
2013 Scion FR-S - 2.0L
2012 Ford Escape - 3.0L
Re: List Impossible Sparkplug Replacement [Re: Tman220] #5446164 06/04/20 02:13 PM
Joined: Feb 2009
Posts: 30
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satyr64 Offline
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Joined: Feb 2009
Posts: 30
Originally Posted by Tman220
Originally Posted by TmanP
That would be a pretty long list... many transverse V6 would fall under that category, for sure. Off hand, two I remember - GM 3800s are very tight, so many people unbolt a motor mount and tip the engine forward. Tthe Sienna's 2GR-FE back plugs are completely hidden; the intake manifold usually comes off to replace them.


I've found W-bodies with the 3800 to be pretty easy actually. It's pretty much any GM car with the 2.8, 3.1, 3100, 3400 60 degree v6's that usually require a special tool to tip the engine forward. Unless the 3800 you are speaking of was in a minivan? Those are never easy.

My personal contribution would be my 94 camaro with the Lt1. When it had stock exhaust manifolds (they are above the plugs), AIR injection plumbing, they were pretty tough to get to. My first plug change it was obvious that the #8 plug (passenger side rear) had never been changed, due to the other 7 being a obviously newer AC Delco's. removing the starter and getting it from below the car was pretty much a requirement.

In contrast, now that the emission equipment is gone, has long tube headers, its about a 30-45 minute job.



I agree with my 94 Camaro LT1 . I changed the wires and distributor at the same time as the plugs. The next time at approx. 60 k the hesitation started and needed new distributor The car was sold instead.

Re: List Impossible Sparkplug Replacement [Re: borgward] #5446167 06/04/20 02:27 PM
Joined: Dec 2019
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blufeb95 Online Content
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3L Ford/Mazda Duratec, gotta remove that intake plenum to get to the rear plugs.

Re: List Impossible Sparkplug Replacement [Re: borgward] #5446175 06/04/20 02:41 PM
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Posts: 29
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ScottyB Offline
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if i remember right, if you used some certain aftermarket headers on a Ford 302 with GT40 heads, you couldn't remove the plugs, at all, without dropping the headers. now that would suck!

Re: List Impossible Sparkplug Replacement [Re: borgward] #5446176 06/04/20 02:41 PM
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kschachn Online Content
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1994 BMW 530i, 253K
1996 Honda Accord, 289K
1999 Toyota Sienna, 437K
2000 Toyota ECHO, 290K
Re: List Impossible Sparkplug Replacement [Re: borgward] #5446216 06/04/20 03:44 PM
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another Todd Offline
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I could never replace the spark plus on any diesel I have ever owned...I could never find them! grin


2019 Jeep Cherokee Trailhawk V6
2017 Ford Escape 2.0
2002 GMC Yukon
2008 Yamaha Rhino 700 FI
2010 Itasca Meridain/Freightliner Cummins 6.7 non DEF
Re: List Impossible Sparkplug Replacement [Re: borgward] #5446248 06/04/20 04:37 PM
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VQLT Offline
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#6 cylinder on the early model (WD21) Nissan Pathfinders

Re: List Impossible Sparkplug Replacement [Re: another Todd] #5446252 06/04/20 04:40 PM
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Imp4 Offline
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Originally Posted by another Todd
I could never replace the spark plus on any diesel I have ever owned...I could never find them! grin

Too busy looking for the muffler bearings?!?

Re: List Impossible Sparkplug Replacement [Re: borgward] #5446253 06/04/20 04:41 PM
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cb_13 Offline
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Chevy Astro van

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