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Technical => Engine Tech => Topic started by: HooptiCat on November 27, 2008, 08:44:21 AM

Title: how do i change passenger side sparkplugs on a 3.8?
Post by: HooptiCat on November 27, 2008, 08:44:21 AM
Hey guys this is my first post, anyways im changing the sparkplugs in my 87 Cougar 3.8. how do i get to the passenger side plugs? any help would be greatly appreciated
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: jpc647 on November 27, 2008, 11:56:20 AM
Well for starters you have to take the airbox off of the car(the intake and hose). Its a realy pain in the butt to get at the 3rd one in, the one closest to the back of the engine on a 3.8l. To tighten it you may need a socket extention and a universal(the sockets that bend). Other than that its kinda trial and error to get it out,  but it is a pain in the butt.

Welcome aboard!
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: HooptiCat on November 27, 2008, 12:46:58 PM
thank you, hours of google searches couldnt even come up with that information. your help is greatly appreciated
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: daminc on November 27, 2008, 12:52:08 PM
Funny, I never had a problem getting to the plugs. But I automaticly put a swivel on it and didn't give it much thought when you asked that question.

Now a 351 in a van that's a fun time. LOL
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: jpc647 on November 27, 2008, 01:14:26 PM
No problem. At 16 when I tried to tune it up, not knowing a whole lot I had a hell of a time.
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: HooptiCat on November 27, 2008, 04:20:08 PM
this is completely unrelated to sparkplugs, but my ler blew up kuz it backfires like a bitch, any clue whats wrong? or how would i go about installing a new ler? or would a glasspack/ler (cherrybomb) work?
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: Thunder Chicken on November 27, 2008, 07:26:50 PM
See my post in your other thread. Could be the anti-backfire valve in your smog pump system.
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: daminc on November 27, 2008, 09:38:46 PM
If It's not that, your TFI could be cutting out. Does it lose power at all for a split second before it backfires?
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: daminc on November 27, 2008, 09:52:56 PM
I just read the popped ler thread.
Probably not the TFI. although it will make a car backfire
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: jcassity on November 27, 2008, 10:03:44 PM
Quote from: jpc647;244958
Well for starters you have to take the airbox off of the car(the intake and hose). Its a realy pain in the butt to get at the 3rd one in, the one closest to the back of the engine on a 3.8l. To tighten it you may need a socket extention and a universal(the sockets that bend). Other than that its kinda trial and error to get it out,  but it is a pain in the butt.

Welcome aboard!


god!! what are people on nowadays:hick:

AIR BOX?

anyone who has an 87 v6 is probably wondering if your from mars:D just kidding but for real now,,,,, if you dont know ,, dont answer.


here is the answer.........
you've ran into a clearance problem alone the pass side because the smog pump pipes are in your way.

-its best to use a regular spark plug socket with the hex end.
-install your socket
-slip a box end wrench on the socket
-bend wrench if you have to
-loosen spark plug with wrench a turn or two
-finish it by hand reaching in there.

0r...........
remove your smog lines per my diy

0r..........
pry on the smog lines so they bend more towards the pass strut tower and you can get in there with a socket / universal. I personally never had good luck with anythng but using a box end wrench on the pass side.  once i deleted the smog, i felt as at ease on the pass side as i was on the driver.
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: jcassity on November 27, 2008, 10:09:03 PM
Quote from: HooptiCat;244992
this is completely unrelated to sparkplugs, but my ler blew up kuz it backfires like a bitch, any clue whats wrong? or how would i go about installing a new ler? or would a glasspack/ler (cherrybomb) work?


just under the console there abouts is the connection to your catalytic.  loosen those bolts and allow your intermediate pipe to lay down on the ground or off to the side.

get a pipe and start beating the hell out of the guts inside the catalytic.

start car,,, step on the gas and blow out your progress.  shut off car.

get under car and repeat gutting process, start car and blow out debris.

once you get to a wire woven mesh like material, you are either done or real close.

your new ler usually will require at the min,, a ler (lifetime one at advance:D ) and a tail pipe.  the tail pipe usually rusts right along the bend over the axle.  to get the old one out , I usually have to jack the body up on one side so the axle lowers just enough so the tailpipe clears and can be removed.  same goes for install, keep one side up and install.
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: JKATHRE on November 27, 2008, 10:54:44 PM
PS----I picked up a flex head, short shaft ratchet from Harbor Freight tools (three size set--1/4; 3/8 and 1/2).  It was very handy for tight plug position spots where you need a slight angle to work well. I found that a universal joint or socket creates an overall length problem on a ratchet end and they may be impossible to use with a narrow working area like the passenger 3.8---or the 5.0.  Wish I had these 35 years ago!  Cheers.
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: HooptiCat on November 28, 2008, 05:48:24 AM
awesome thank you for all your help, got my new plugs in now :), it was running very very shiznitty before, plug #1 was gapped at .024 :mad:
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: daminc on November 28, 2008, 08:36:16 AM
Glad to hear you got it done.
Still back firing?
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: HooptiCat on November 28, 2008, 08:37:11 AM
geez, this car has been sitting for 6 years, i think its coming back to life, the air filter was black so i changed it, sounds much better, i changed the plugs, sounds even better, now i just seafoamed it, it deffinatly feels better too. any suggestions on what else to do to it?
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: jcassity on November 29, 2008, 02:44:09 AM
yes,,
there is a lot..... click on my diy link and read up.  there are many things you can do.
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: HooptiCat on November 30, 2008, 12:54:05 PM
its over heating now, it looks like the coolant is getting backed up in the reservoir, any suggestions on what to do
Title: how do i change passenger side sparkplugs on a 3.8?
Post by: V8Demon on November 30, 2008, 07:10:13 PM
Pull the thermostat and drop it in a pot of boiling water on a stove to see if it's opening.....

You could also have a hole in a coolant line that is sucking air.

Got a pressure tester?