View Full Version : Couldn't find it in search
gherb
08-01-2005, 09:34 AM
Hi. Just joined to forum and i must say, what a great place. i currently have a 2005 trailblazer LT. fully loaded with sunroof (thus no DVD) and no navi. i'd rather have a GPS unit i can take from car to car. :cool:
over the weekend, i purchased and installed a K&N drop in filter (Model number :E-1009). since my ride is a lease, nothing permanent can be done. my biggest question is two part. do i need to remove the plastic air box over the intake? will there be a noticable difference with it on or off. and also, when i installed the filter, i noticed a bypass hole that allowed air to go into the enigine unfiltered. why and should i cover it up and seal it with some duct tape? :undecided
i do notice a difference with the new High Flow filter over stock. i'm running higher RPM's. but the one thing i did notice that i never noticed with my stock filter was that my oil pressure is now reaching 50 on the dash gauges. i never used to go passed 42. normal for what i'm seeing? :o
Dacomputernerd
08-01-2005, 11:24 AM
Hey i also got a lease, i hear you when you say nothing can be permanant. However, when i asked the dealership about modifications, they said "If you have to modify the vehicle to REMOVE the part, the part should stay with the vehicle" Now, he didnt say anything about modifying to install :D The way he worded it sounded rehersed, so mabie its policy.
Actually, i was looking at that exact same filter yesterday. I was also wondering about letting unfiltered air in the engine? I think we should block the hole, but lets wait till someone more knowlegeable comes along and gives there :m2:
Do you have the 4.2 I6 or the 5.3 V8 (i got the V8)
ParadoxJr
08-01-2005, 04:32 PM
Hey i also got a lease,
Do you have the 4.2 I6 or the 5.3 V8 (i got the V8)
Buddy,
It's Your Parents TB!!! What the Heck??
Russ
gherb
08-01-2005, 04:51 PM
Buddy,
It's Your Parents TB!!! What the Heck??
Russ
my 2005 TB LT, I6 however, is not my parents and is infact mine. so again to the question at hand. keep air box uncovered and shut the bypass hole? or leave everything the way it is. remember, nothing permanent, i'm leased up. not sure if any cutting is required with a new intake either, so any suggestions are totally welcome.
Black Ice
08-01-2005, 06:28 PM
my 2005 TB LT, I6 however, is not my parents and is infact mine. so again to the question at hand. keep air box uncovered and shut the bypass hole? or leave everything the way it is. remember, nothing permanent, i'm leased up. not sure if any cutting is required with a new intake either, so any suggestions are totally welcome.
Calm down :yes: and welcome, if you take a look at what he quoted you would have seen it was not you he was talking about... :)
jauto98
08-01-2005, 08:01 PM
Buddy,
It's Your Parents TB!!! What the Heck??
Russ
Actually, I believe this in reference to Dacomputernerd, not gherb. A past topic mentioned this. ;)
gherb
08-02-2005, 01:19 AM
Calm down :yes: and welcome, if you take a look at what he quoted you would have seen it was not you he was talking about... :)
very sorry for my last comment if it offended anyone. did not mean to. i was misunderstood and misunderstood the comments as well. :duh:
Dacomputernerd
08-02-2005, 11:44 AM
Buddy,
It's Your Parents TB!!! What the Heck??
Russ
OK, ok, in MY PARENTS TB, should i block the hole if i install the K&N Drop In?
(its just easer for me to refer to it as mine, but you are right, it is my parents. I just do most of the cleaning/polishing/washing/waxing so i would like to think that i can somehow call it my own because i take care of it, but it is not :duh: )
bmm354
08-02-2005, 03:01 PM
If you remove the top part of the airbox/filter housing you MUST block/cover/patch that hole. Otherwise you'll be cutting the engine's lifespan in half--or worse. Go for a long drive on a gravel road with the hole open and the engine could suck in enough grit to do serious damage.
If you remove the plastic airbox cover it might flow more air, but it's going to be warm air from the engine bay. Warm air = not good. Probably best to leave that cover there, as then the filter will be drawing cool air from the front of the truck.
As for the oil pressure, that could be due to running at higher RPMs or maybe the engine is breaking in and the pressure is stabilizing to where it will normally run. High oil pressure is not usually a big deal; low oil pressure on the other hand is deadly to engines. I'll check what my '02 Envoy I6 runs at so you can have a baseline.
Here's a thought for lease-related things like this...you could always replace the modified parts with used parts from a junked vehicle. The cost would be minimal.
Dacomputernerd
08-02-2005, 04:25 PM
ok, patch the hole, got ya :D Thanks :yes:
Blulytes
08-02-2005, 04:57 PM
I have not looked... but I really find it hard to believe that they would leave an unfiltered access.
I will have to do some creative investigating when I get home.... Too bad I haven't bought my CAI yet...
Blulytes
08-02-2005, 07:16 PM
Ok... here is what I found.
The intake tube (for lack of better wording) has this hole. Why? I don't know... however...
http://gallery.trailvoy.com/data/500/medium/Airbox01.JPG
If you look at the top of the airbox, where this opening fits into is a sealed compartment on the top of the airbox. It does not let dirty air into the intake after the filter. So, no need to worry all!
http://gallery.trailvoy.com/data/500/medium/Airbox_02.JPG
Any questions, let me know!
envoy62
08-02-2005, 11:04 PM
Hey this is my first post here and i believ i can clarify the question about the hole in the intake manifold tube visible after removing the top part of the filter.
When installed that hole matches tlines up to the hole in the upper part of filter, leading to a chamber created by the double walled top part. If you look closely you will see that this chamber is not connected to the other side of the box, hence not bypassing the filter.
This si done to add volume to the intake, this acts as a noise filter reducing intake noise.
The top part is actually divided in 2 chambers one connected to after filter and the other in front of air filter looked at in flowing direction.
If you want to leave the top part of you should plug the hole, otherwise you wuill suck in all the dirt particels that find it;s way under the hood into the engine, and this will increase meachanicall wear resultin in reduced life of your engine. The other thing is that by doing this you will significantly increase inake noise which will be audible in passenger compartment, might eventually not sound very nice.
Performance wise leaving hole open or close makes no difference this engine seems to use a speed density system (map manifold absolute pressure sensor instead of mass airflow sensor) to meassure engine load , so any leaks into intake will be automatically compensated by ems system.
This design of the airfilter housing doesn't look very good to me from a performance standpoint, the filter sides are fairly block off by the plastic case walls of the aircleaner box. On my car i can see on afairly new filter concentraed pattern of dust in the area of the black tube that leads toward the front of engine through which the air gets sucked in. A more open design would be better with an intake tube succking in air really outside the engine compartment.
That is also a point i noticed on most cold air intakes offered for this engine at the end all of them only suck in hot air from engine compartment.
Regards to all great site
bmm354
08-03-2005, 12:14 PM
If you want to leave the top part [of the filter housing] off you should plug the hole...
This is what I was getting at. I might have misunderstood, but I thought the main question was whether or not to plug the hole if the airbox cover was removed. I should have made it more clear that cover off = plug the hole.
With the cover in place the hole will not be a problem and should be left as-is. Thanks Blulytes for the pics and envoy62 for the added info.