champneys05

good thread! thanks.

JoeDel

unfortunately that 2nd pic looks all too familiar right now

sageuvagony

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by JoeDel &raquo;</TD></TR><TR><TD CLASS="quote">unfortunately that 2nd pic looks all too familiar right now </TD></TR></TABLE>


what? the coolant in cylinders?

JoeDel

yeah that is exactly what my engine looked like when i pulled off the head the other day oh well hopefully i should have it all back together this weekend when i get the time to finish it

ESmoothSTi

Where did you get the metal gaskets from and are you talking about IM gasket, TB gasket or both? Im looking to do a complete tune up, cap, rotor, PCV etc and figure I would tackle this at the same time. <TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by sageuvagony &raquo;</TD></TR><TR><TD CLASS="quote">
The new gasket I used was a metal gasket so next time it won't be a problem removing it. Again, make sure you remember where all the plugs and hoses go.
Modified by sageuvagony at 9:14 AM 8/15/2008</TD></TR></TABLE>

sageuvagony

The replacement gasket I got from advance auto parts for the intake manifold just happened to be a metal gasket vs the oem paper gasket that was on there. The throttle body gasket I had to get from Honda since the auto parts store has the wrong gasket listed for my engine for some reason. I went to install the gasket but it was too small. They couldnt help me out further.

fmrprojects

cleaning the throttle plate and intake manifold helps a whole lot. i always just drop it off at a machine shop and have them drop it in the hot tank for the day. comes out brand new

Evs-One

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by 00civiccali &raquo;</TD></TR><TR><TD CLASS="quote">doesnt an oil catch can keep your intake manifold clean?</TD></TR></TABLE>

As long as you're not circulating back into the intake, you won't get any sludge.

Breather hose off valve cover and PCV valve allow blow-by to get into intake stream.

Best stuff I found for cleaning intakes(off the car), is Amsoil power cleaner foam, and a small wire brush. Spend about 15 minutes, run under hot water, and you're good to go

mizzoEG

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by Evs-One &raquo;</TD></TR><TR><TD CLASS="quote">As long as you're not circulating back into the intake, you won't get any sludge.

Breather hose off valve cover and PCV valve allow blow-by to get into intake stream.</TD></TR></TABLE>

So it's good to disconnect the breather hose from your Valve Cover so excess oil/sludge doesn't build inside your intake manifold, wow why would Honda design it that way?

And can you explain about the PCV valve better, thanks.

SleepyHatchZ6

hey sage i think theres some fluid on your pistons in your old engine that shouldnt be there, but i might be wrong haha jus wanted to let you kno lol

Evs-One

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by mizzoEG &raquo;</TD></TR><TR><TD CLASS="quote">

So it's good to disconnect the breather hose from your Valve Cover so excess oil/sludge doesn't build inside your intake manifold, wow why would Honda design it that way?
</TD></TR></TABLE>
It's recirculated to be burned by the engine, rather than venting to open atmosphere- emissions purposes.
<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote &raquo;</TD></TR><TR><TD CLASS="quote">

And can you explain about the PCV valve better, thanks.</TD></TR></TABLE>
PCV= Positive Crankcase Ventilation valve. Wiki search it. It's a one way valve allowing blow-by/positive pressure in the crankcase(oil pan), to be relieved and fed into the intake

Hill4589

Damn. I'm gonna do this all this weekend! Thanks for the info!

sageuvagony

I just filled up today. 40.92 MPG!!!!!!!!!!!!! 40.92 compared to 19 to 20 MPG before cleaning the intake manifold!!!&$@(!*YREU@HRkhfe!!!!jlghrkr!!!!! This is with constant A/C use and tons of hitting the rev limiter . Gad dang I am so happy. I wanted to make sure I added the EXACT amount of gas as last time. Last time I did 2 click shut-offs from the pump. Like last time, today, the second click was a FRIGGIN gas overflow mess again. From now on just 1 click

Just now as I filled up I also decided to fill up my tires to 44 PSI. I'm just testing it out pretty much. Before adding air to my tires, my tires were all around 20 PSI. Now the tires steer left and right with almost no effort. I didn't really notice much difference in ride quality until I hit the dip on my street. I now have to take the dip alot slower Other than that, the ride quality is fine since my sound system muffles everything anyway.


Modified by sageuvagony at 3:47 PM 8/24/2008

sde780

Wow! any chance of making a step by step? I have a y7 too and it's been getting 22 in the city

iainuts

Hi sage - thanks for the info. My car is doing something similar now, not sure what it is. Having problems idling. After seeing your post, I pulled the rubber intake boot off the manifold, rotated open the butterfly plate, and looked in. There wasn't a whole lot of garbage inside from what I could see, pretty clean really - which might be surprising after 170,000 miles. Anyway - question for you: Was the intake right where this main 'header' is gunked up? Or was it only the 4 individual intake runners? How bad was the main header?

sageuvagony

<TABLE WIDTH="90%" CELLSPACING=0 CELLPADDING=0 ALIGN=CENTER><TR><TD>Quote, originally posted by iainuts &raquo;</TD></TR><TR><TD CLASS="quote">Hi sage - thanks for the info. My car is doing something similar now, not sure what it is. Having problems idling. After seeing your post, I pulled the rubber intake boot off the manifold, rotated open the butterfly plate, and looked in. There wasn't a whole lot of garbage inside from what I could see, pretty clean really - which might be surprising after 170,000 miles. Anyway - question for you: Was the intake right where this main 'header' is gunked up? Or was it only the 4 individual intake runners? How bad was the main header? </TD></TR></TABLE>

The manifold runners themselves were gunked up. When you pull off the manifold, there are 4 holes (1 for each runner)



Normally the holes should be completely open, but mine had almost a about 1/3" to 1/2" thick layer of soot/carbon along the bottom of the 4 runners/holes which was horrible. When you pull off your intake manifold you may not see as much garbage but you will for sure see carbon along the bottom. I also wiped off the carbon off the intake ports of my cylinder head as well. Wasn't much carbon there but there still was some carbon.

obuhmyuh

seafoam works pretty well too, not sure if it would clean 1/2" or whatever of crap though

TheCoupeDeuce

you just inspired me to add this to the weekend list thanks man great post. hey any chance of a step by step

ESmoothSTi

I just changed out my PCV valve this weekend which was clogged up and not functioning properly. I dont doubt that the cleaning helped your mileage, but I'm willing to bet it a lot of it was related to poor PCV and vaccuum function than the actual buildup of gunk. In general, I'd recommend starting with the "easy" job of replacing the PCV valve, then go from there. I went from 30MPG to 36MPG with just that change. If your results arent a lot better, then it may be worth pulling the mani off and doing a comprehensive cleaning.

EJ1_Sleeper

sounds like ill be doing this on my g/fs y7 this winter when i have time. she has a poor start up, a terrible idle, im sure her mileage could be better, throttle response sucks (even tho its an auto) and her brakes are pretty stiff (not even a year on them).

sageuvagony

My pcv valve wasn't that bad at all. It was only a few months old. Now yes, the hose under the pcv valve that runs to the black box was filthy. I know for sure that this mileage had something to do with the car not getting enough air because like I said, I was able to raise my MPG to 37-38 about a year and a half ago by JUST having my FITV fully open (with everything dirty), but the drawback to that was that my idle bounce like a mother! Annoying and embarrasing. If it was only the pcv valve system that was causing all this bad-ness then I wouldn't think allowing extra air through the FITV would have helped.

That was exactly how I found out my car wasn't getting enough air and was running too rich. Also, my brakes are MUCH more sensitive now since there is a stronger vacuum in there. Ohh I'm so happy!!!! Ohh yea, did I mention, I'M IN LOVE WITH MY SMOOTH IDLE!??!?!!? I also love the deep growl I now have compared to the way it was before. I can now hear my intake ALOT more. It sounds so vtec-ish.. and I don't even have vtec.