valve stem fell...keeper question

[A. Jay]

How long does it take to undo 14 studs?

It takes a while to get to those bolts, and you ruin some gaskets on the way

I don't know if this is true for the newer cars, (if you wanna consider 89-90 newer) but my dad (who is 73 and is used to working on pre 80's cars) says that if you overhaul the top end the pressure will end up blowing the bottom. So i'm kind of worried about that. Any insight? I appreciate all your help so far guys

I'm working on my head right now and my next door neighbor, who's ~60, told me the same thing about the higher compression. I told him that as an engine designed for a turbo, it can handle any extra pressure, The 8.4:1 compression helps, too. But if your aiming for higher boost, than you will need to do something to avoid detonation.

Hey dopey, you don't put the line thru with glue on it. you put it thru clean, then fish it out the spark plug hole. after that, you use a magnet to fish out the valve stem. Then you clean the tip of the stem and glue the line to the top of the stem, slowly drop the valve back in, and pull the line out the guide. It would be more funny to see a YouTube video of you trying to get yourself out of your locked car. That seems like a challenge for you.

Calm down, you should've mentioned all of that before. But I for one would like to see a demonstration of this, it sounds interesting.

Take it easy guys, I wasnt looking to start a fight here.
Ian you know I got love for you man, but you said it was rediculous, and I'd like to take a stab at it, to see if its possible to do in a reasonable amount of time. I know its not the right way, but when you pull a head you need new gaskets which can be costly. Suppose you pull it off and find that you need to have your head resufaced to put your previously running engine back togther? Not saying this is the right way to do it, but if your flat broke, this could be money you dont have.
Ray, I came up with this idea, you corrected a flaw in it. I will come through saturday, but I'm not coming through for you, I'm coming through for us, so we can prove our case. Teamwork broski!
Who knows, maybe we will fail miserably, maybe we pull it off in 20 minutes. We won't know until we try it. Lighten up guys, its all in good fun.

+1

But if you can't, don't be scared to pull the head. It's a very common thing to do on these cars which means that there's plenty of documention on how to do this on many websites, including this one of course. Undoing 14 bolts sucks, but if it puts your supra back on the road, you gotta do what it takes.

 

[Zumtizzle]

this thread is nifty.

 

[rayall01]

Get it on timelapse video, because we won't have all day to watch it

One question for the op, did the valve fall into the cylinder, or just fall down and stop in the guide?

My coolpix can only record about five minutes, cause I only have a 512 MB sd card. I will have to record it in stages.

 

[rayall01]

Calm down, you should've mentioned all of that before. But I for one would like to see a demonstration of this, it sounds interesting.

Since this is a refinement of the idea lewis15498 originally posted, it seemed pretty obvious that I was going to run the line through the guide, and fish it out the plug hole. All the other steps just logically progress from there.

 

[rayall01]

And by the time you do your song & dance, I would have the head off,
all the seats lapped, carbon cleaned off, fresh gasket on,
and be torquing the head bolts......

Who's the dope ?

You can pull a head off, clean it, lap valves, and be in the process of reinstalling it in 15 minutes. Wow, you're special! I am humbled by your magnificence!

 

[lewis15498]

It takes a while to get to those bolts, and you ruin some gaskets on the way

Exactly, this cood be a time and money saver approach.

But if you can't, don't be scared to pull the head. It's a very common thing to do on these cars which means that there's plenty of documention on how to do this on many websites, including this one of course. Undoing 14 bolts sucks, but if it puts your supra back on the road, you gotta do what it takes.

Believe me I'm not afraid to pull a head, I just wanna see if we can do this.

AKA, the MacGyver approch........

I think if we pull this off we should be made "Official SM Expert: Macgyver, and jerry rigging approaches" lol

 

[rayall01]

I think if we pull this off we should be made "Official SM Expert: Macgyver, and jerry rigging approaches" lol

giggity!

 

[jdub]

Have at it...just be honest and keep an accurate total time

 

[CyFi6]

If the valve didnt fall ALL the way into the cylinder and the stem is still sticking through the valve seat you might be able to push it back into the guide via the intake port (assuming you lost an intake valve), if its an exhaust valve dont even bother trying those ports are way too small.

 

[rayall01]

Have at it...just be honest and keep an accurate total time

My intentions exactly!

 

[kotu100]

i can't believe i missed this... im 15 mins from raynham. can i come watch?

i LOVE jury-riggin schtuff. if it can save me some bucks, im down for it.
matter of fact i gotta do my valve stem seals as well, but im sure as hell not replacing my headgasket to do it. thats another $100 i dont need to spend.

 

[rayall01]

i can't believe i missed this... im 15 mins from raynham. can i come watch?

i LOVE jury-riggin schtuff. if it can save me some bucks, im down for it.
matter of fact i gotta do my valve stem seals as well, but im sure as hell not replacing my headgasket to do it. thats another $100 i dont need to spend.

It's OK with me, It's lewis' house though, he gotta give the OK.

 

[IJ.]

i can't believe i missed this... im 15 mins from raynham. can i come watch?

i LOVE jury-riggin schtuff. if it can save me some bucks, im down for it.
matter of fact i gotta do my valve stem seals as well, but im sure as hell not replacing my headgasket to do it. thats another $100 i dont need to spend.

No need to remove the head to do seals..... :nono:

You can either use a compressor to keep them in place or a safer option is to bring the cylinder to TDC then turn the crank back 1/4 turn and using some nylon rope fill the cylinder through the plug hole then turn to crank back towards TDC until it stops.

The Rope will hold the valves in place while the seals are done and the springs replaced, then you turn the crank back and remove the rope and do the next cylinder.

A few tips
Tie the loose end of the rope to something
Twist/twirl the rope as it feeds in so it coils in the cylinder
makes 100% sure it's TDC on the compression stroke (all valves closed on the backs of the cams)

A small magnet in the tool for removing the locks helps.

 

[dumbo]

No need to remove the head to do seals..... :nono:

You can either use a compressor to keep them in place or a safer option is to bring the cylinder to TDC then turn the crank back 1/4 turn and using some nylon rope fill the cylinder through the plug hole then turn to crank back towards TDC until it stops.

The Rope will hold the valves in place while the seals are done and the springs replaced, then you turn the crank back and remove the rope and do the next cylinder.

A few tips
Tie the loose end of the rope to something
Twist/twirl the rope as it feeds in so it coils in the cylinder
makes 100% sure it's TDC on the compression stroke (all valves closed on the backs of the cams)

A small magnet in the tool for removing the locks helps.

Why the rope/compressed air??????????


Can't you just let the valve sit on the piston while it's at TDC compression?

 

[IJ.]

Never tried it but I doubt you'd get the keepers back in as either the spring will coil bind or the retainer will bottom out on the seal.

 

[lewis15498]

i can't believe i missed this... im 15 mins from raynham. can i come watch?

i LOVE jury-riggin schtuff. if it can save me some bucks, im down for it.
matter of fact i gotta do my valve stem seals as well, but im sure as hell not replacing my headgasket to do it. thats another $100 i dont need to spend.

Absolutely, your welcome to come! Were doin it saturday unless its fuckin raining, PM me if you want to come.

 

[cinciguy89turbo]

Getting the keepers back on is a BITCH! I haven't been able to get any back on.

 

[kotu100]

No need to remove the head to do seals..... :nono:

You can either use a compressor to keep them in place or a safer option is to bring the cylinder to TDC then turn the crank back 1/4 turn and using some nylon rope fill the cylinder through the plug hole then turn to crank back towards TDC until it stops.

The Rope will hold the valves in place while the seals are done and the springs replaced, then you turn the crank back and remove the rope and do the next cylinder.

A few tips
Tie the loose end of the rope to something
Twist/twirl the rope as it feeds in so it coils in the cylinder
makes 100% sure it's TDC on the compression stroke (all valves closed on the backs of the cams)

A small magnet in the tool for removing the locks helps.

yea i read about that tip before. funny thing is, i told some of my car buddies about it and they all looked @ me like i had 5 heads...

i'll give it a try sometime soon.
also i've read about a cheap tool i can make to reintall the keepers/compress the spring. anyone know where a link for it is? i googled it, but didnt come up w/ much.

 

[dumbo]

Never tried it but I doubt you'd get the keepers back in as either the spring will coil bind or the retainer will bottom out on the seal.

I suppose thats a possibility. My friend just did his 240sx, KA engine, and he just let the valve sit on the piston. 7M might not be so friendly.

 

[cinciguy89turbo]

also i've read about a cheap tool i can make to reintall the keepers/compress the spring. anyone know where a link for it is? i googled it, but didnt come up w/ much.

This would be awesome...I've tried the pvc pipe and obviously the spring compressors won't work for our cars since the springs sit in a little cylinder themselves. I think this honestly is the hardest part about this job so far.