[warning] TRD 272degree cams for 4age

[30psi 4agte]

just to clarify valve springs need 1.5 mm minimum clearence before bind to be safe !!!!

your valve clearence should not be relied on to make sure the springs dont bind!

progkamol: have you done any othe damage ??? placing the valve springs under so much stress can also cause probs else where !!!


how are the cam tunnels ??? Are their threads still in one piece ???

[Vios-GT_07]

dude.. i hate to say this.. but i stopped buying things for my vios from thailand... even though they race vios and stuff, u can race anything with copied goods... it's just they won't last as long .. and yea this is the first time i've ever heard of valve springs breaking... sorry to say, and it's worse it's happened to you... i've bought a few things from the "race team" from thailand through a Malaysian agent.. and that'll be the first and last time i ever do it... the item i got fubbared in 2 weeks and it wasn't second hand either.. oh well..

between you and me.. i'll say i've modded my ride with a few TRD parts i got from japan among the list of upgrades and i think i'm faster around the track than the typical vios race cars (N.A. division)... shhh..

in all seriousness, what are the part numbers for the cams and valve springs you've got? just so we can be sure u weren't shafted...

hey u're in W.A.... cool!! hehehe.. cheers mate

[1200det]

As mentioned if he had 2 X Inlet Cams the engine wouldnt have ever started in the first place.


.

[Big T]

theres your problem. the TRD levin&trueno bible has some bad news.

13501-AE871 CAMSHAFT, intake, 272°, 7.5mm
is correct, no problems there but...

the part number 13501-AE831 does not exist

are you POSITIVE it is this part number? did you misread the label? it is impossible to run an intake cam on the exhaust due to the missing distributor drive gear.

the part number for the item you most likely have is:
13502-AE831 CAMSHAFT, exhaust, 272°, 10.0mm

which needs a .34 clearance to accomodate the 10.0mm lift.
This is why if you installed this cam profile with a 7.5mm spec clearance of .25 you would fuck your springs up good and proper as you have most likely done.

The correct exhaust camshaft part number you want is:
13502-AE871 CAMSHAFT, exhaust, 272°, 7.5mm
i am 100% positive of that.

the 2 in 13502 means 'exhaust'.

I'm leaning towards Garth's theory. You've probably got the 10mm lift 272s. But in which case you would've have to run underbucket shims.Or you've gotten shafted on the springs. I'm runnning TRD 272, 7.5mm lift cams with TRD N2 spec valve springs. My head reconditioner mentioned nothing of the sort of thing you've mentioned.

Eddie.

[allencr]

you don't even think it is possible. All my valve springs breaks!!!!! How could it possible,

You're right, it is impossible that 16 springs break at the same time!
I do not believe you!

[takai]

You're right, it is impossible that 16 springs break at the same time!
I do not believe you!

Now now, be careful with big words like impossible. Try very damn unlikely instead.

[roadsailing]

if one broke for a good solid reason, why wouldn;t the other 15?

if you run over 4 nails (in the right order) you will get 4 flat tyres

[oldcorollas]

theres your problem. the TRD levin&trueno bible has some bad news.

13501-AE871 CAMSHAFT, intake, 272°, 7.5mm
is correct, no problems there but...

the part number 13501-AE831 does not exist
.

my bad, i copied it from Roba MR2 page (cached somewhere on geoncities ) he must have mistyped it... but he definitely wasn't talking about 10mm lift ones....

http://www.geocities.com/motorcity/7...camshafts.html
they list 3 272 cams, and 2 of them are 7.5mm, one is 10.5.

http://www.geocities.com/MotorCity/F...62/TRDcam.html

yup, he got part number wrong... meh

still seems VERY strange to have ALL your valve springs break....
i call bodgy shenanigans, both part quality and installation (just to cover my bases )

if it was spring bind, it would have happened the first time the car was revved. 3 months after, only on weekends is still not the first time...
so i call dodgy parts..


part numbers and pics please.

[Ben Wilson]

The only way I can think of for all 16 to break would be some sort of binding.

Perhaps the springs were on the limit of binding and the engine was a little hotter or something allowing just that little bit more thermal expansion?

[progkamol]

Well, after all, guess I'll have to dig up my trashes box and find the plastic bags for those springs. I didnt see myself that all 16 springs break but I did see one then my friend who is a mechanic just says all your springs are dead. In this case, by listening to you all, I guess there are two possibilities one is the cam was install wrong as the specs are wrong and two is the springs are made from bloody big bal point pen springs!.

There is one thing wierd. The cams came nicely wraped in plastic placed in a box with lable but the springs are in just plastics with lable (oh, they are 4 in each bags, but I've checked they all got the same lable)

VIOS_GT I guess in Thailand there are too much coped stuff and I am aware of it. However I am surprise that the boys in Thailand could use those stuff to rev the shit out of thier car. Well you know, if you buy from china town you are most likely to get a fake one. I bought it from the official racing team outlet and I can't be sure that it is 100% real. They are good at copies. But yeah I paid cheap for those parts now I'll have to pay the price for new engine.

30PSI 4AGTE, its seems that it didn't caused much damge (I think) coz the cams SEEMS ok. Hard to believe, i think they're gone but my friend said it was ok. However there are some other damage as well. I didnt have a look myself since I am not that pro. A friend of mine says there are problems in the combustion chamber as well. Dont know what might be the cause still. Some other parts are covered with oil so I cant see much.

Well, the TRD 272 is a good cams but, could be the person who install it fuk me up or the springs are no good. Anyway we'll find out .....

[The Witzl]

I think some of the shims played pinball inside the head and fubared the whole lot

[takai]

Aye, Karl may be onto something. Check if there are massif gouges into the head. Soft alloydoesnt like being hammered with shims at 8000rpm.

[Ben Wilson]

I think if the shims had come out there would be some visable damage on the buckets as well. That being said, high speed pinball could be a logical answer...

[progkamol]

I'll have a look later on. Shouldn't be that but it is possible anyway. Hey guys, so you reckon I should pull out the undamge parts and put in the GZE that is going in to my car? Just asking, I guess it fits. But anyway have to see one by one bout the damge.

So now there are 3 possibilities now .... Will have to find out .... And some how, I hope I won't blown another engine haha ...

[Billzilla]

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