changing valve springs with head on engine what tool?

[AL92]

I guess am used to my v8 cars and on them its easy to change out springs on the car with heads still on.Can this be done on the 2.0? Any special tool? I see some c type spring compressor in my shop manuals but that if for heads off the car.If any of you know specific tool than appreciate it if its even possible.
And will the stock rev limiter or maybe a bit higher to 8000 be ok with my hks 264/272
s .I do have high mileage on my stock springs now though so thats why wanted to run the new springs.

 

[Awdboost]

I wouldn't bother with replacing springs unless you are porting the head and all the goods stuff.. You can safely bring the stock head to 8k with HKS 272/272 and yes you can do it, I've been doing it..

 

[turbotalon92]

I do not know of any tool for doing it on the block, I have only seen the c-type clamp also. It is a good idea to replace the factory springs if yours are high mileage though. I am going to do the same, but am going to have to pull the head.

 

[carwizard1]

What if you got a spool of nylon string or something and fish it into the cylinder to keep the valve from falling in after the retainers are removed? I think I read that somewhere. That should work.

 

[anconover]

what does porting the head have to do with putting in springs to ensure not to have valve float? nothing. You need to drop rope into the cylinder, and bring that piston to the top, the rope will take up room and hold the valves in the head.

Dont give people poor information like, you can safely rev the head to 8k on 272's. Because its not true. Your doing it, your lucky then. It might be able to be done in some instances where the springs are in good shape. But not everyone is that lucky to have everything in good enough shape to handle it. Can be done yes, but it is far from 'safe'.

You can make the tool seen in the vfaq for only a few dollars. Stock rev limiter SHOULD be ok with that cam setup, but if you plan on taking it to redline often, upgrade them.

 

[Awdboost]

What if you got a spool of nylon string or something and fish it into the cylinder to keep the valve from falling in after the retainers are removed? I think I read that somewhere. That should work.

There is a tool.. I don't know where to get it and you use compressed air to keep the valves from falling.. Not fish string.

I don't have more the 65K on my motor, but my bud in Cal has over 145K on his bone stock motor with cams. He revs to 8k on his HKS 272/272 and has buddies that do the same thing with higher.. Trust me you don't need to waste your time do that. Unless you modified balance shafts or oil gallarys you will be fine.

 

[RavenX]

as long as the springs and retainers you get are new you will be fine. I have the fp2 cams with brand new oem springs and retainers and i can turn 8k just fine

 

[Awdboost]

what does porting the head have to do with putting in springs to ensure not to have valve float? nothing. You need to drop rope into the cylinder, and bring that piston to the top, the rope will take up room and hold the valves in the head.

Dude What your problem.. I said it's not worth doing untill he removes his head for what ever reason.. I'm not the only guy who is reving to 8K.. I wouldn't be doing it if it wasn't safe and if I didn't research it. The stock spring can handle it. Wouldn't sit at 7.5k but who does, and you don't make much more power with a stock head at that RPM, you will lose it thou. Do your homework before attack me. I've done research on this.. What have you done?? Not Cool.. :thumbdown

BTW I've bounce off my rev limiter set at 8k when I launch my car because of the lack of traction.. and I still have 175 across the board on stock spring???

 

[turbotalon92]

Dude What your problem.. I said it's not worth doing untill he removes his head for what ever reason.. I'm not the only guy who is reving to 8K.. I wouldn't be doing it if it wasn't safe and if I didn't research it. The stock spring can handle it. Wouldn't sit at 7.5k but who does, and you don't make much more power with a stock head at that RPM, you will lose it thou. Do your homework before attack me. I've done research on this.. What have you done?? Not Cool.. :thumbdown

BTW I've bounce off my rev limiter set at 8k when I launch my car because of the lack of traction.. and I still have 175 across the board on stock spring???

I think it is important to look at all the facts here. Your springs in your 98 GSX are surely not as tired as the stock springs in the original poster's 92. Yes the stock spring can handle it, as long as they are still within spec.

You are taking a risk to rev a high mileage motor above the stock redline with big cams without looking at the condition of your springs.

Lastly, what does bouncing off the rev limiter have to do with compression numbers?

 

[anconover]

Waiting to install springs till you blow unecessary money on a port job is a bad idea. Springs can be very important. And the stock 1g head flows extremely well.

Ive seen stock springs cause float on 272's at 7k, 8k, and in between. So its not safe to say a stock spring can handle revving to 8k on 272's. And even if it does, it wont forever. Because a few have done it, doesnt make it the safe and right choice by far. Im just saying, unless it really is tested information, dont tell someone its safe because a few have done it.

 

[Mike1992]

I floated 2 valves bouncing the limitor in 3rd gear in my all stock 90 gst at 123k. Please dont ask why I did this, racing without a tach was stupid on my part.

 

[arash15]

just be safe and upgrade. its better to invest into something that you know will work instead of ending up with a messed up head.

 

[huafist]

I think it is important to look at all the facts here. Your springs in your 98 GSX are surely not as tired as the stock springs in the original poster's 92. Yes the stock spring can handle it, as long as they are still within spec.

You are taking a risk to rev a high mileage motor above the stock redline with big cams without looking at the condition of your springs.

Lastly, what does bouncing off the rev limiter have to do with compression numbers?

We may disagree on break-ins with high dollar turbos But I agree with turbotalon92 100% here - If you're gonna spend the money on high dollar cams, replacing the springs is relatively cheap insurance to ensure you're not gonna destroy your engine.

 

[turbotalon92]

^^^^

 

[NDgsx]

I use a miller spring compressor

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[Defiant]

http://vfaq.com/mods/Valvestem-seals.html

Or, you can build one:

http://www.plymouthlaser.com/scomp.htm

 

[AL92]

I want to change out valve springs and install new valve seals with the head still on the car.I have been told snap on sells a tool that can do this but its 120 US.I also heard napa has some kind of tool but think that was for the 3.0 mits engine not ours.Anyone know of any other tool cheaper than the snap on one?

 

[rowlex]

get the snap on or something quality, that shit is HARD to do even with the head out of the car....

 

[myblack98gst]

mitsubishi makes a tool specifically designed for the head. It works very nice, but you need to know someone in the service department in order to borrow it probably..

 

[alexg1323]

hard, no not at all with any mechanical background. You develop a technique quick. Time consuming, oh god yes. You can do this with the head on the motor using a home made tool like this. http://plymouthlaser.com/scomp.htm you just gotta be crafty. good luck