2004 Forester Timing Belt

D

davesixtythree

Hi,
I have 110,000 on a 2004 Forester turbo. I believe the replacement
interval is 105,000. Question, how long will these belts last or
should I just get r done now? I've gone 170,000+ on 6 cylinder
Honda's but I don't want to be left stranded? Any advice would be
appreciated.
Best Regards, Dave
 
Hi,
I have 110,000 on a 2004 Forester turbo. I believe the replacement
interval is 105,000. Question, how long will these belts last or
should I just get r done now?  I've gone 170,000+ on 6 cylinder
Honda's but I don't want to be left stranded? Any advice would be
appreciated.
Best Regards, Dave

factor of 10+ difference in cost doing it vs waiting til it breaks.

do it, and don't cheap out - change the water pump, idler
bearing ,tensioner - basically everything that turns except cams/
crank.
 
factor of 10+ difference in cost doing it vs waiting til it breaks.

do it, and don't cheap out - change the water pump, idler
bearing ,tensioner - basically everything that turns except cams/
crank.

I had mine done a couple of weeks ago when I needed a new water pump.
Nowhere near mileage but when pump was off, only extra cost was the belt
as it was put on a new one or put back the old one.
 
I don't want to be left stranded? Any advice would be
appreciated.
Best Regards, Dave

You'll be more than stranded when the belt breaks and the valves
collide into the pistons.
 
davesixtythree said:
Hi,
I have 110,000 on a 2004 Forester turbo. I believe the replacement
interval is 105,000. Question, how long will these belts last or
should I just get r done now?

Do you have a crystal ball?

I've gone 170,000+ on 6 cylinder Honda's but I don't want to be left
stranded?

I'd strongly suggest changing the belt for several reasons. First, I
believe they may have advertised a 105k interval, but I think on some
models they rethought that and went back to 60k?

As someone who had a timing belt break on a Honda, you don't wanna go
there just to save a few hundred bucks in preventive maintenance.

Second, Subarus like Hondas are interference engines. If your belt
breaks, you'll not just be stranded, you'll have enough engine damaage
such that you'd have essentially just totalled your perfectly good
2004 car.

Finally, have someone that knows subes do this job. A non-sube savvy
generlist is quite likely to **** it up, at least in my experience
with an independent mechanic.
 
davesixtythree said:
Thank you all for the advice, I will take it to the dealer for the
service.

Oh...one last bit of advice, it's a sales recession and dealers are
looking to make up the revenue in the service department. Don't be
surprised at a lot of suggested services, like the oh so lucrative
fluid power flushing services that come in transmission, brake, engine
oil, and differential varieties. All of them costing around $139
each. If you can check and eyeball those fluids and know when last
you had them serviced going in, you'll be in a better spot to know
whether the "your fluids are FILTHY!" FUD you'll likely get is
legitimate or not. If you haven't had any of these done lately,
though, they probably are worth thinking about though as the service
interval on a lot of the fluids is a lot more frequent than a lot of
people realize.

I'd be interested in the list's collective opinion of these power
flush services and whether they're really worth the benefit they
advertise vs drain and fill, and whether there aren't reliably just-as
good places to have it done outside of a dealer. Refilling coolant on
Subes does seem to be trickier than most other cars, so there may be
an argument for having that done with a sube savvy place? I'm
curious.

Dave--as for less specious upsells you might face: when doing a timing
belt, it's usually advised to change the water pump since it's not
that much of an adder to the job, and if the water pump takes a shit,
you're stranded, engine overheats, and would have to re-do all the
labor of getting that timing belt in there (and be stranded) anyway.
Timing belt tensioners on the 2.5L cars are like disposable candy too,
so it's possible that they'll suggest a new "cold weather 2 minute
ticking device" (aka the timing belt tensioner) with the timing belt
service too.

Good luck!
 
Firmly believe replacing the ATF/filter and the coolant at recommended
intervals is money well spent if you are the type that drives the car
to its end of life. I once got 450K miles out of an old Chrysler by
adhering to this.
 
Second, Subarus like Hondas are interference engines.

Someone please explain the advantages of interference engines.
Subaru used to have many (most?) non-interference engines and
now, seemingly, has none. What gives?

Thanks,

Dima
 
Someone please explain the advantages of interference engines.
Subaru used to have many (most?) non-interference engines and
now, seemingly, has none. What gives?

Thanks,

Dima

All manufacturers are chasing better economy/emissions/power
optimization and I doubt there are many non-interference belted 4cyl.
engines around. I think Toyota may still have one.
Subaru's flat 6 engine has a chain that should last the life of the
engine. I think mazda has an inline 4 with a chain. Perhpas there is a
trend toward chains now.

Maybe someone else has more info.
 
Someone please explain the advantages of interference engines.
Subaru used to have many (most?) non-interference engines and
now, seemingly, has none. What gives?

Thanks,

Dima

The advantage of an interference engine is that they can make it with
a higher compression ratio more easily. Try to design an engine with
10.5 to 1 compression without interfering. It might be possible, but
you'd have to angle the valves so they would be more parallel to the
travel of the piston. This would crowd room for spark plugs and would
create a need to make the flow into and out of the chamber more in
line with the travel of the piston as oposed to swirling around the
chamber. That swirl allows the flow to not have to slow as much and
steals less energy from the flow, thereby increasing efficiency. There
are many many reasons for valve angles to be as they are.

So you can have either good flow efficiency, a high compression ratio,
or a non-interference engine, or any two of them, but probably not all
three.
 
The advantage of an interference engine is that they can make it with
a higher compression ratio more easily. Try to design an engine with
10.5 to 1 compression without interfering. It might be possible, but
you'd have to angle the valves so they would be more parallel to the
travel of the piston. This would crowd room for spark plugs and would
create a need to make the flow into and out of the chamber more in
line with the travel of the piston as oposed to swirling around the
chamber. That swirl allows the flow to not have to slow as much and
steals less energy from the flow, thereby increasing efficiency. There
are many many reasons for valve angles to be as they are.

So you can have either good flow efficiency, a high compression ratio,
or a non-interference engine, or any two of them, but probably not all
three.

I have a 1995 is that non interference?
 
Jeff typed -
I have a 1995 is that non interference?

According to Google, which you could certainly have done, it is a non-
interference, whether it is a 1.8 or 2.2, since you didn't say. But
you should
still change the timing belt at recommended intervals.

Dan D
'99 Impreza 2.5 RS (son's, currently undergoing cosmetic surgery)
Central NJ USA
 
I have a 1995 is that non interference?- Hide quoted text -

- Show quoted text -

The 1.8 ansd 2.2 are non-interference, and the 2.5 is interference. I
have heard that the 2.0 is non-interference, but the same person that
said that said,"it's gotta be since turbos have such low compression."
That makes sense, but it's not the same as knowing for sure that it
is.

I jsut did a timing belt on my 2.2 a few months ago and I can confirm
that you can turn the cams round and round without smacking the
piston. Or at least I coudl with the particular position that my
pistons were in at the time, which might not actually mean much.

Have a good one,
Bill
 
The 1.8 ansd 2.2 are non-interference, and the 2.5 is interference. I
have heard that the 2.0 is non-interference, but the same person that
said that said,"it's gotta be since turbos have such low compression."
That makes sense, but it's not the same as knowing for sure that it
is.

I jsut did a timing belt on my 2.2 a few months ago and I can confirm
that you can turn the cams round and round without smacking the
piston. Or at least I coudl with the particular position that my
pistons were in at the time, which might not actually mean much.

Have a good one,
Bill

Yeah, there IS a soob engine that will not collide piston to valve,
but the VALVES will collide with each other due to angle/diameter
geometry.
 
Yeah, there IS a soob engine that will not collide piston to valve,
but the VALVES will collide with each other due to angle/diameter
geometry.- Hide quoted text -

- Show quoted text -

As in the exhaust valves will collide with the intake vavles? That
must be a DOHC engine since it isn't possible for one cam to open both
valves on a cylinder at the same time. I think the only DOHC engines
are the early 2.5s and the 2.0s, so since the 2.5s are already
interference with the piston, maybe that is the 2.0 engine. I'm just
thinking out loud. Not saying it is so. Any insight on this?

Bill
 
As in the exhaust valves will collide with the intake vavles? That
must be a DOHC engine since it isn't possible for one cam to open both
valves on a cylinder at the same time. I think the only DOHC engines
are the early 2.5s and the 2.0s, so since the 2.5s are already
interference with the piston, maybe that is the 2.0 engine. I'm just
thinking out loud. Not saying it is so. Any insight on this?

Bill

I THINK it's the later 2.2s (after 96) that can do that. Not sure.

here's some data (there's the 2.5 SOHC listed that I have doubts about
being non-int at one of the links so , YMMV)

list of Soob engines;
http://autorepair.about.com/od/glossary/ss/timin-belt-inf2_6.htm

also from; http://en.wikipedia.org/wiki/Subaru_EJ_engine#EJ25
******The SOHC EJ Subaru boxer engines were non-interference engines
through 1996, run by a single timing belt driving both cams (both
sides of the engine) and the water pump. Because they are non-
interference engines, if the timing belt fails, the engine of the
models up to 1996 will not be destroyed. The oil pump is driven
directly from the crank shaft and the waterpump by the timing belt.
All DOHC and 1997-up SOHC EJ engines are interference engines, if the
timing belt fails the engine will likely be destroyed or the valves &
piston will be heavily damaged.******

Interestingly, the DOHC EG33 flat 6 'likely' could never suffer
interference if 'only' the timing belt broke because of the gear
driven second cam.
 

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