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Old 05-11-2012, 08:20 PM   #3376
ssssly
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V8/9 motors have the screens in the rear firewall side AVCS hard line bolts. Not in the bolts that go to the solendoid.

45% is the max, and standard, AVCS advance for v8/9 motors. Should also see about 11% at idle.

From your log looks like your left is floating and your right polarity is backwards.
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Old 05-11-2012, 08:28 PM   #3377
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I know people reccomend changing a few things when buying a jdm motor. Mine was said to have 20k kilometers. The two belts outside the timing covers look MINT. Should I still take it apart and change the timing belt, timing belt guide, sparkplugs, water pump, oil pump ect????
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Old 05-12-2012, 07:09 AM   #3378
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Nobody guarantees the mileage of these engines, so maybe it is true, but you never know..
You could change things in stages, depending on how the engine runs.

The belt can also age, to an extent, so it's probably a safe bet to replace it and maybe the tensioner.
Then do an oil change and maybe thermostat (which has often replacement intervals in the factory brochure and which sat exposed for who knows how long, instead of being marinated in corrosion inhibitors).

Then run it and see and log how it responds.
If need be, change the plugs after a while and then default into the normal routine.
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Old 05-12-2012, 11:25 AM   #3379
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hey twin scrollers,

how does one fix a leak in the uppipe/headers connection? I don't believe thicker gaskets exist, and stock ones doesn't fix it
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Old 05-12-2012, 11:54 AM   #3380
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Quote:
Originally Posted by Hyper View Post
hey twin scrollers,

how does one fix a leak in the uppipe/headers connection? I don't believe thicker gaskets exist, and stock ones doesn't fix it
Have you tried block sanding the mating surfaces to make sure they are flat?
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Old 05-12-2012, 12:08 PM   #3381
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the twist is actually visible, sanding it won't really work
I either need to shave that somehow or find a thicker gasket I think
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Old 05-12-2012, 12:20 PM   #3382
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Is this a bend in the mating surface, on one of the two flanges?
Then try to hammer it back to where the screw bore is perpendicular, then bring the unit to a machine shop and let them machine the mating surface plane.
The pressure upstream of the turbo is quite high and a gasket with less than uniform mating pressure may leak, then you're back to square 1.
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Old 05-12-2012, 03:01 PM   #3383
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Is this a good replacement list? Missing anything?
Timing Belt, aftermarket guide
AC Belt, Alt Belt
Water Pump
Oil Pump
Oil Cooler
Idlers/Pulleys
Thermostat (which should I get) 160? Daily driver in MA
Spark Plugs (which should I get) NGK bkr7eix one step colder?

And for the pumps and belts do I buy for wrx or 04-07 STi?
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Old 05-12-2012, 03:19 PM   #3384
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Quote:
Originally Posted by 25rsti View Post
Is this a good replacement list? Missing anything?
Timing Belt, aftermarket guide
AC Belt, Alt Belt
Water Pump
Oil Pump
Oil Cooler
Idlers/Pulleys
Thermostat (which should I get) 160? Daily driver in MA
Spark Plugs (which should I get) NGK bkr7eix one step colder?

And for the pumps and belts do I buy for wrx or 04-07 STi?
I don't really think an Oil Pump or Oil Cooler is necessary unless there are signs of leaking or something
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Old 05-12-2012, 03:24 PM   #3385
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Quote:
Originally Posted by 25rsti View Post
Is this a good replacement list? Missing anything?
Timing Belt, aftermarket guide
AC Belt, Alt Belt
Water Pump
Oil Pump
Oil Cooler
Idlers/Pulleys
Thermostat (which should I get) 160? Daily driver in MA
Spark Plugs (which should I get) NGK bkr7eix one step colder?

And for the pumps and belts do I buy for wrx or 04-07 STi?
I've got a v8 alternator for sale if you decide you need one

Btw, I'm running oem range thermostat. Also, plugs are the original ones that the motor came with and it runs great, not sure why you're considering swapping them.
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Old 05-12-2012, 03:38 PM   #3386
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I'm just trying to cover all ranges. I don't need an alternator, mine came with one. :-)
From the looks of my engine from the outside and looking at the AC and ALT belts it doesnt even seem like I need to do anything, belts are mint, but I'm trying to be "safer than sorry".
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Old 05-12-2012, 05:42 PM   #3387
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Quote:
Originally Posted by ssssly View Post

Or the ECU freaking out for no reason. The fix being to warm up the car to operating temps, reset the ECU, then turn the car on and immediately floor it in first before the AF learning kicks in. Don't know why but it seems to fix a lot of issues with AVCS codes and such. For whatever reason the V8 and 9 ECUs have a tendency to kick out AVCS and AF codes for no reason if the sit for a lengthly period of time without use.
oh hell yeah!
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Old 05-12-2012, 07:20 PM   #3388
mike280
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Quote:
Originally Posted by 25rsti View Post
Is this a good replacement list? Missing anything?
Timing Belt, aftermarket guide Yes so you know how many miles are on it.
AC Belt, Alt Belt only if they look bad
Water Pump I didn't replace mine.
Oil Pump No
Oil Cooler No
Idlers/Pulleys Yes
Thermostat (which should I get) 160? Daily driver in MA No, I always use oem.
Spark Plugs (which should I get) NGK bkr7eix one step colder? Denso iridium.

And for the pumps and belts do I buy for wrx or 04-07 STi? Sure

Replied above in red.
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Old 05-12-2012, 09:06 PM   #3389
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What's the matter with the NGK? Why do you prefer Denso? If Denso, what's the part number?
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Old 05-12-2012, 11:38 PM   #3390
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is there valve cover/frame clearance issues like with the 2.5L? if not, why use iridium?
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Old 05-12-2012, 11:56 PM   #3391
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Quote:
Originally Posted by kaj View Post
is there valve cover/frame clearance issues like with the 2.5L? if not, why use iridium?
um....what?
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Old 05-13-2012, 12:13 AM   #3392
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Originally Posted by murrdogg24 View Post
um....what?
most people use iridium plugs because they last longer. especially Sti owners, due to the pain in the ass it is to swap plugs.
otherwise, copper burns great for turbo cars. iridium has such a really fine spark. IIRC, you have to run a closer gap and a few other things. not ideal for our cars. unless the 207 likes them for some reason? just asking.
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Old 05-13-2012, 12:32 AM   #3393
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My ej207 loves NGK bkr7eix iridiums. 22psi all day everyday.
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Old 05-13-2012, 12:36 AM   #3394
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Quote:
Originally Posted by kaj View Post
most people use iridium plugs because they last longer. especially Sti owners, due to the pain in the ass it is to swap plugs.
otherwise, copper burns great for turbo cars. iridium has such a really fine spark. IIRC, you have to run a closer gap and a few other things. not ideal for our cars. unless the 207 likes them for some reason? just asking.
I'm pretty sure JDM ej207 cars come with iridium one step colder plugs as stock, mine had NGK's
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Old 05-13-2012, 12:39 AM   #3395
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Quote:
Originally Posted by murrdogg24 View Post
I'm pretty sure JDM ej207 cars come with iridium one step colder plugs as stock, mine had NGK's
one stop colder than? if they come with a certain heat range, isn't that stock? i'm not sure i'm followin' ya. you mean one step colder than USDM engines?
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Old 05-13-2012, 12:41 AM   #3396
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Originally Posted by kaj View Post
one stop colder than? if they come with a certain heat range, isn't that stock? i'm not sure i'm followin' ya. you mean one step colder than USDM engines?
yea one step colder then stock USDM WRX/STI heat range, and it's not really that hard to change them, it took me about 35 mintues. Not sure what u mean by frame clearance....
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Old 05-13-2012, 12:48 AM   #3397
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Originally Posted by murrdogg24 View Post
yea one step colder then stock USDM WRX/STI heat range, and it's not really that hard to change them, it took me about 35 mintues. Not sure what u mean by frame clearance....
i'm told the 2.5L engine doesn't have much room in between the valve covers and the frame, making it difficult to change plugs. as such, most people go with the iridium plugs so they don't have to go through it very often. there is a spark plug faq on this site that discusses all of it as well. i guess "difficult" is a relative term.
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Old 05-13-2012, 12:50 AM   #3398
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Originally Posted by kaj View Post
i'm told the 2.5L engine doesn't have much room in between the valve covers and the frame, making it difficult to change plugs. as such, most people go with the iridium plugs so they don't have to go through it very often. there is a spark plug faq on this site that discusses all of it as well. i guess "difficult" is a relative term.
ok and this thread is for the ej207....
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Old 05-13-2012, 04:01 PM   #3399
25rsti
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Originally Posted by Vlad View Post
I just wanted to post the manufacturer number for the V9 Coil packs.
They're made by Diamond, like all others, the Diamond model number is FK0106F and there's a batch number, 4809.

I am convinced that the coil pack model goes with the spark plug model, so even if people mix and match them all the time and the engines still run, it's better to get the right ones in there.
I just wanted to add that MY V9 motors coil packs read FK0186 & FK0188 With a batch # of 6308.

The spark plugs in my motor are NGK R, PFR7G
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Old 05-13-2012, 04:13 PM   #3400
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Quote:
Originally Posted by murrdogg24 View Post
ok and this thread is for the ej207....

.....which why I originally asked why everyone is using iridium plugs on these engines.



Quote:
Originally Posted by kaj View Post
is there valve cover/frame clearance issues like with the 2.5L? if not, why use iridium?
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