[warning] TRD 272degree cams for 4age

[The Witzl]

Sounds like the springs are binding. You need to check for at least 0.060" clearance from valve-to-piston at all times.

How the fudge to you check valve to piston clearance??

[Billzilla]

How the fudge to you check valve to piston clearance??

You dummy-assemble the engine, (just one cylinder will do) with plasticine on the piston tops and lightly cover the top of the plasticine with oil so the valves don't stick.
Then turn the engine over slowly by hand, then pull it apart again. Section the plasticine to see how far the valves have pushed into it. You typically need a good 0.060" or 1.5mm to be sure it'll all clear okay.

[kingmick]

You dummy-assemble the engine, (just one cylinder will do) with plasticine on the piston tops and lightly cover the top of the plasticine with oil so the valves don't stick.
Then turn the engine over slowly by hand, then pull it apart again. Section the plasticine to see how far the valves have pushed into it. You typically need a good 0.060" or 1.5mm to be sure it'll all clear okay.

i have never used a non stock cam,piston or valve without measuring with plasticine!
specs are one thing but you need to check, because if you deck the block and shave the head you change the clearance on stock, on non stock you start running into trouble.
this is a good lesson for those that are building engines! its easy to throw an engine together, but there is a reason it takes so many days of measuring and testing to put a good engine together. You need to measure after the machine work is done and them order you parts of that . many people have cme unstuck from ordering all the stuff, getting the engine machined themn putting it together and the setup is way out!
Building an engine is simple, building a performance or race engine is not if you want to do it properly. This is why when people say blue printed most of the time there having themselves on.

p.s exactly right bill! they have bound and snapped! it takes time to do depending on the loads you put on the springs. the hotter the springs the quicker it will happen. You can not expect to get 200k km's out of high lift setups, to much stress even with spring squirters to take the heat out and the best quailty spring!

[kingmick]

p.s a good engine duno trick if your an engine builder and know your specs, is to take the clearance down on the cams to see if the cams and setup can go a bit extra lift

[progkamol]

I see, so what if the cams are installed properly? What could be the cuase? the springs?

ps. some one rep me up plz I don't want to be on the dark side

[kingmick]

I see, so what if the cams are installed properly? What could be the cuase? the springs?

ps. some one rep me up plz I don't want to be on the dark side

if installed properly, they might be $2 copies{the springs}. id also be checking the pistons havnt taken a hit from the valves!

[progkamol]

The engine is still in car, I don't want to open it up more than what I did at the moment since later on I will have to tow the whole car anyway. (I dont have any transport to caryy that engine ....

[Vios-GT_07]

dude.. since u are in W.A. and again i'm free as a bird i can give you a hand stripping down your engine... just giv me the tools and i'll go sick on it.. take the head to get checked and fitted professionally.. a thicker HG for lower comp ratio, and new set of valve springs, shims etc all necessary bits to suit your cams.. get the professionals to measure up the shims,bucket, valve clearences and such and such.. please get your facts straight dude...

1. are all the springs really broken? or did you just hear this from your mate who took them apart??
2. part numbers for the valve springs and cams.. help us to help u and then u'll see rep up for timely response and useful info.
3. u could have the wrong shims, buckets and valve clearances (i'm not too familiar with this but i roughly know what it's about).. but even so, it won't break all the valve springs at the same time..
4. it's pretty obvious what's happened here. the valve springs could be fake shit, you didn't measure up the clearances, and unsure if your cams would fit without causing problems. Do you even have the correct cam-shafts and cam gears?

and FYI.. the race teams in thailand race hard with their equipment, but i race harder.. which is why i'm not welcome in Malaysia, because they think my ride has NOS or something stupid.. i've kept up with turbo versions of the vios, another reason they think i cheat.

[progkamol]

Vios GT 07: sorry to ask stupid question, i was just curious where about is your Vios? In Malaysia or Perth?. Would love to see one here. I thought u were overseas, didnt know you in WA as well.

By the way, I was told that springs are broken. I saw with myself only one. (the broken one) not sure bout the rest but was told that its all breaks.
Part number for valve spring would be hard to find since I threw the packaging some where but cams parts number could be found easily since it came in a box. Just need to get off work here and go home check.

Next, I didnt measure anything. Basicly apart from buying parts. I almost take no participation in cams installation and tune up apart from buy ciggarette for my mates and getting them luch and ask them questions.

Last but not least, Do you want to give me a hand putting GZE in instead of stripping the 4AGE out to see wats wrong? Just kiddin, but I would be happy if you say yes .

[Vios-GT_07]

then there's your problem... IMHO u've been screwed by whoever sold you the parts, whoever installed your parts for you, and also u've screwed yourself for not keeping the part numbers as a reference..

dude i'm willing to help but only if you decide what u're going to do.. i can't make that decision for you i.e. fix this, strip that etc etc.... if u need my help feel free to PM me..

[progkamol]

Well, I missed driving this car. I am trying to get the GZE in ASAP. Just short on somemore research. Have to make sure that this wont happen again.

[Garth AE86]

regardless of the boxes/labels the camshafts should be marked on the circular end with 272 7.5

[FASTFOO]

Valve springs broken ? Realy? Did it drop 16 valves all at once?
My frist thought reading the story before i got to the bit about 16 valve droping all at the same time was
Front wheel drive corolla.
big hill (realy big hill you need low gear for)
and an engine with some grunt.
= ENGINE OIL BREATHER AT REAR MOST PART OF ENGINE
Engine sucks a heap of oil that has built up in the rocker cover to the point where it covers the breather and crank case pressure pumps it through into inlet.
Then you get smoke and a car that stops.
I Had my sprinter rally car do it on a speedway track and was sure the engine had blown.
Check comps if it has them it has not droped valves.
This is just a thought and I do not meen to say you do not know what you are looking at but when I hear "mates" are looking at the car I get very sus of conclusions made.

Good luck and I hope it is a simple fix and not the nightmare that it may look.

MATT.
EX. Toyospares.

[FASTFOO]

Sorry for the last post missed the second page conferming broken spring.

MATT.

[GTI-TRD]

But the springs are inside a clear packaging plastic sleeve, sealed with the lable on. Could it be fake or coppied one?

I say FAKE unfortunately... I buy in sets from Toyota NZ dircet from Japan and they come in a small grey carboard box wit TRD printed all over it. No plastic wrapper inside either and large stickers with p/n and description.

Bummer for you, at least they were 'cheaper' from over there