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2003 LL Bean 120k
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135 Posts
Discussion Starter #1
i changed the plugs in my H6 last night, WOW what a poor design flaw.


is there any tips to make this job go alittle faster than 3 hours.

Dar
 

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01 Outback H6 VDC, 97 GT wgn w/ ej22, 98 OBW w/ej22
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no.

but if you think that was hard, you should try replacing the valve cover gaskets. the rear bottom bolt on each side is a real b1tch.
 

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2001 VDC/SC One of a Kind
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12,649 Posts
i changed the plugs in my H6 last night, WOW what a poor design flaw.


is there any tips to make this job go alittle faster than 3 hours.

Dar
Yes. On the driver side, take the battery and washer reservoir out. This makes room to remove the coils.

On the pass side, its just a tight fit. Really nothing you can move out of the way. You could remove the one engine mount nut on that side and jack the motor up as his will help clear the body rail.
 

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03 H6 OBW & 06 WRX Sportwagon
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17,264 Posts
I wish I could have done it in only 3 hours the first time.

I had to use a length of wood and my floor jack to push the engine up a little to re-install the DS rear coil.

'wobble' plug socket and 'wobble' extensions help get the tools in/out.
 

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2011 Tacoma TRD Sport Double Cab Long Box
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OBW H6 VDC, Tribeca, XT6
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with the valve cover gaskets off it's much easier. i did mine when the valve cover gaskets were off and it was actually easy from underneath.

will do my other one soon too and will replace the valve cover gaskets as well.

it's not a design flaw either - cars are not designed with your comfort level or ease of maintenance in mind....no one purchases that way so dealers would be silly to design as such.

note - there are quite a few vehicles (no subarus) that require the engine to be lifted to replace the spark plugs (all the ones I know of are American vehicles). now that is a bit much for me....but only because i'm used to Subaru's.
 

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2001 VDC/SC One of a Kind
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Or Ford F series where the rear of the engine sits under the cowl and you can barely fit a hand in to clean an IAC, or having to replace a forward O2 sensor and the harness plug is midway between the top of the head and exhaust with 1.5 inches between the engine and firewall. Still can't figure that one out except it saved a few bucks a truck in harness cost. So some manufacturers don't even consider replacement of maintenance items in their design.

Subaru is an easier vehicle to work on compared to others. You just don't have other vehicles to compare it with.
 

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2003 LL Bean 120k
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135 Posts
Discussion Starter #8
Oh yeah i did it from the bottom, On the pass side i did put a small port-a-power between the engine and frame and moved it over about 1 inch, that help alot, as well as all the corect tools, i just didn't want to unhook the motor mounts to raise it up, although i probly will the next time.

i think maybe raise it up and scoot it over mite be the way to go.
 

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01 LL Bean
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135 Posts
Oh yeah i did it from the bottom, On the pass side i did put a small port-a-power between the engine and frame and moved it over about 1 inch, that help alot, as well as all the corect tools, i just didn't want to unhook the motor mounts to raise it up, although i probly will the next time.

i think maybe raise it up and scoot it over mite be the way to go.
Kind of like doing that 6th injector on your Dodge...some jobs are a pain.
I have an 06 3500 Ram in the fleet.
 

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2003 LL Bean 120k
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135 Posts
Discussion Starter #10
My 6th injector is easier to get to than yours. :p







but there are things that are a pain on everything i guess.

just never thought it would ever take me 3 hours to change plugs...
 

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06 OBW 2.5, 05 Forester, had 03 H6 OBW
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Had a dodge minivan- for some basic maint jobs the 1st step was 'remove intake manifold'...
 

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2003 LL Bean 120k
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135 Posts
Discussion Starter #12
As someone already mentioned the first step on a head gasket job for some ford powerstroke trucks is #1 "remove the cab"

what were they thinkin.
 

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2001 VDC/SC One of a Kind
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On Ford stupidity. Have one in the shop now for ignition plugs replacement. 5.4 3 valve POS. The coils were removed and plug ports flooded with PB Blaster and sat for 5 hours. 7 of 8 plugs broke off. This morning, I'm going in to remove the lower portion of the broken plugs. The rear of the engine will be the most difficult because of the placement of the engine. I will probably spend about 3 hours getting them removed and replaced.

Ford is the worst for building a vehicle for maintenance. It's like they are put together as if nothing will ever go wrong and reg scheduled maintenance is labor intensive.
 

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2001 Outback H6
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86 Posts
I just did the valve cover gaskets on my H6. I figured that since I had the covers off, I would go ahead and change the plugs. It was definitely easier.
 

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01 LL Bean
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As someone already mentioned the first step on a head gasket job for some ford powerstroke trucks is #1 "remove the cab"

what were they thinkin.
I heard the new powerstrokes are that way.

I had a ferrari 348; to change belts the first step was remov.e the car from the engine cradle.
 

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On Ford stupidity. Have one in the shop now for ignition plugs replacement. 5.4 3 valve POS. The coils were removed and plug ports flooded with PB Blaster and sat for 5 hours. 7 of 8 plugs broke off. This morning, I'm going in to remove the lower portion of the broken plugs. The rear of the engine will be the most difficult because of the placement of the engine. I will probably spend about 3 hours getting them removed and replaced.

Ford is the worst for building a vehicle for maintenance. It's like they are put together as if nothing will ever go wrong and reg scheduled maintenance is labor intensive.
+1 on this!! I have a '98 Lincoln Navigator; last two spark plugs/coils on each side are so far back under the cowl you can't even see them. When I needed plugs, I waited until a local dealer had a "loss leader" special and let them do it. Coils are starting to die (not unexpected at 270K) so my ground rule is that I will replace 1,2,5 and 6; my mechanic will do 3&4 or 7&8 as one on each side fails. End of rant!!!
 

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2002 VDC Outback sedan
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173 Posts
on the other side of the coin, i think the easiest stock vehicle i ever changed plugs on was my 94 corvette. With the hood tilted forward, the entire engine is available to work on.

the old 84 F250 with straight six was pretty easy too, you just climbed up and sat in the engine bay next to the engine.
 
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