Replacing valve springs without removing head?

[cat007]

Hey all

Just wondering if anyone has every replaced valve springs without taking the head off?
I've got a set of performance springs for my 1G-GTE and pretty keen on putting them in to stop the valve bounce I get at around 8,000rpm.

Feeding rope down in through the spark plug hole and then using the piston to wedge the valves shut is an idea that I've heard thrown around before.

I guess I'd have to make some sort of SST to compress the springs to get the keepers and retainers out.

Any tips or pointers oh how to do it or what your SST looks like?

[mjrstar]

I'm not too sure exactly how you go about this..

But a word of warning, your oil system won't love 8000+ rpm.

I accidentally hit my 7800 rpm limiter on the 1G on the short track at Taupo the other day, I can't say I normally have need for more RPM's than that!!

[Distrb]

did it on an altezza 3sge

Just modified a valve spring compressor tool that a friend had made up so that it would attach to the head and push the spring straight down



then just made sure the piston was at the top of whatever cylinder was being done at the time so if the valve fell, it wouldnt fall far. wasnt really an issue, because the oil around the valves and stem seals seemed to hold the valve in place without much issue.

oh and it was a 2 person job (one to hold the valve spring compressed and the other to fit the collets).

[cat007]

I'm not too sure exactly how you go about this..

But a word of warning, your oil system won't love 8000+ rpm.

I accidentally hit my 7800 rpm limiter on the 1G on the short track at Taupo the other day, I can't say I normally have need for more RPM's than that!!

I have heard bad things about the number 6 bearings running dry and there's a sharp edge behind the oil filter?

[Shrike]

http://www.toyotool.com/PURCHASE.htm

http://www.monkeywrenchracing.com/produ ... ts_id=1316

have a look at them designed to remove springs without taking head off best way to keep valves up is to run compressed air into the cylinder so do one clylinder at a time :p

[cat007]

They look too difficult to make. I'll make a lever based system I think

[Rookie]

I've done valve stem seals with the rope trick, it worked well, highly recommended.

[sergei]

http://www.toyotool.com/PURCHASE.htm

http://www.monkeywrenchracing.com/produ ... ts_id=1316

have a look at them designed to remove springs without taking head off best way to keep valves up is to run compressed air into the cylinder so do one clylinder at a time :p

That is an awesome tool. well worth the couple of hundreds of dollars if you want to do couple of heads.

[mjrstar]

I have heard bad things about the number 6 bearings running dry and there's a sharp edge behind the oil filter?

yeah I have oversized the crank and big end feeds to #1 and #6 and did some mild oil gallery porting around the pump and filter.

I have no idea if it will actually help but I thought it couldn't hurt...