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 Post subject: valve guide lenght chi4v
PostPosted: Tue Feb 13, 2018 6:14 pm 
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Out of boredom(no snow)I pulled the chi-4v heads off my 408c just to have a look.It started with the 4-speed trans. problem and moved on from there..(really it did)
Why not get out the porting tools? They could use a little clean up..The castings are off a bit or more on one head compered two the other.

SO how short can you safely cut the valve guides? Rule of thumb?
IN-2.5
EX-2.3
Stock...


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PostPosted: Tue Feb 13, 2018 6:46 pm 
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I wouldn’t worry about the length as much as the shape. You can contour the shape of it and the surrounding aluminum.

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PostPosted: Tue Feb 13, 2018 8:34 pm 
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The guide hangs out about 10mm .390 th
Just looked like a lot to me..
As normal I will adj. as I fell comfrortable with.
and tell myself later what a bad idea it was..

working on the 2nd head tonight that is almost perfect compered to the first head.
You never know what you are going to get from the casting gods.
next set I will pay for the CNC


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PostPosted: Mon Feb 19, 2018 3:56 pm 
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WELL after a lot more work than I had antisapated cleaning up the CHI-4V heads... it is going back together.
If you look at the web page it shows you this really nice head (4-V)but that one is CNC ported!
Not the one you get unless you order it..... THE flow numbers............... Who knows were thay came from.
I have real porting tools NOT a dremel or air and it took far more time(hours) to just clean them up than need be..

I did cut the valve guids all the way down...I dont have a dyno or a air flow unit.....I Can only hope for the best....

I have photos but it takes to much time at this moment..


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PostPosted: Tue Feb 20, 2018 11:11 am 
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I will get the photo thing some day


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PostPosted: Mon Feb 26, 2018 8:55 am 
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Good times shall be had by all..NOT
Three years ago i lost a harden sleel intake washer that destrod the block head piston.
I have surgery keep track of all nuts washers bolts from that time on.

Nurse...Doctor. Doctor. I think we are missing a sponge!!!
Doctor...Dont worry your little head... its on the floor somewere...
By the way nurse my wife is out of town are you free tonight?
Nurse..Not untill I find that sponge!!!!!!!!!!!!!!
Doctor...Not to worry I always carry a condom....

RAZER BLADES suck...
Bore and piston very unhappy at this time. Head will be OK?

Not shore how it got there but it did......


Last edited by ray on Mon Feb 26, 2018 10:56 am, edited 4 times in total.

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PostPosted: Mon Feb 26, 2018 9:07 am 
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Ugh. Sorry to hear that man.

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PostPosted: Mon Feb 26, 2018 12:45 pm 
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Things just get better.............
Nurse...Docter.Doctor.I think your push rod is bending.
Doctor..How can that be?...It has worked fine in the past
Nurse...Maybe its coil bind? Have you been CK.for that?
Doctor....YES!
Nurse...Your push rod is just to weak! Call me when you get a thicker one.....

I need to move the car so I just cleaned it up and put it back together.
I did change the valve springs to something a little heaver when it was apart.(the first time)
Leftovers from the 408c mud truck....Maybe a little to heavy for the current push rods.
When you turn the motor over you can see the push rods bend before thay get to max.lift
Not shore what the springs are but plan on looking into it...NO on the coil bind!!!
When I find out............ I will inform........


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PostPosted: Mon Feb 26, 2018 12:52 pm 
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OR.....

You could put the old springs back on. :D

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PostPosted: Mon Feb 26, 2018 1:12 pm 
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Put the old springs back on?
Are you kidding me.......That would be to simple and cost affective.
YES I have to pull the heads again...(to fix the past problem )
WHY not just talk yourself into I NEED BIGGER......DAME IT....

Nurse...Doctor.Doctor.Where are you going????
Doctor....To get something stronger!! Than see me rev up..(thy make a pill for that)


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