Valve Clearances & Performance

[Kai]

Been searching for a definitive answer to this, but...say the valve clearances are out of spec - either too tight, or too loose, what sort of symptoms & impact does this have?

I'm guessing poor acceleration & throttle response as well as ticking noise?

 

[radiod]

I know too tight and you risk having the valve stuck partially open. Not sure if too loose affects anything other than excessively loud valve train and over time possibly extra wear on the cams. I guess they wouldn't be opening as far though either so technically it wouldn't be flowing as much air.

 

[toyotanos]

Tight=hung valves, burnt due to lack of cooling (by not contacting the valve seat), valve seat damage is also possible.

In Spec=happy engine

Loose= possible spitting shims if the cams are aggressive/high rpm, noise, lack of performance, emissions testing failure.

 

[Kai]

Then i have loose shims - i wish they werent $24 each! :/

 

[Smashey]

i remember reading that bucket shims from a honda atv or motorcycle, have the same dimensions as ours for a lot cheaper. Other vehicles as well but coudn't tell you what from sorry man hope this helps.

Matt

 

[Dirgle]

How are Honda prices over there? Apparently some Honda motorcycle shims fit.

http://www.supras.com/06/techcenter/display.php?QID=82

edit:Smashey beat me to it.

 

[Orion ZyGarian]

Do 1ZZ shimless buckets fit? Does anyone know?

 

[91 1jz]

Ya my lifters tick a little too right now ive just been putting locus oil in

 

[te72]

Ya my lifters tick a little too right now ive just been putting locus oil in

How's that been working out for you? I'd read through the oils and lubrication sub-forum sticky threads before putting in another drop of that stuff.

 

[91 1jz]

Never thought it was bad dad used it ive always put it in my trucks. is it bad oil for that car?

 

[IJ.]

Do 1ZZ shimless buckets fit? Does anyone know?

1SZ-FE 1000cc Echo

13751-23030 5.12
13751-23040 5.14
13751-23050 5.16
13751-23060 5.18
13751-23070 5.20
13751-23080 5.22
13751-23090 5.24
13751-23100 5.26
13751-23110 5.28
13751-23120 5.30
13751-23130 5.32
13751-23140 5.34
13751-23150 5.36
13751-23160 5.38
13751-23170 5.40
13751-23180 5.42
13751-23190 5.44
13751-23200 5.46
13751-23210 5.48
13751-23220 5.50
13751-23230 5.52
13751-23240 5.54
13751-23250 5.56
13751-23260 5.58
13751-23270 5.60
13751-23280 5.62
13751-23290 5.64
13751-23300 5.66
13751-23310 5.68

 

[Dan_Gyoba]

Damn, gold mine.

I'll probably be doing my valves this weekend. I've got some spare shims, and of course the full complement that's already there, but now at least I can get the ones that I need.

 

[Orion ZyGarian]

1SZ-FE 1000cc Echo

13751-23030 5.12
13751-23040 5.14
13751-23050 5.16
13751-23060 5.18
13751-23070 5.20
13751-23080 5.22
13751-23090 5.24
13751-23100 5.26
13751-23110 5.28
13751-23120 5.30
13751-23130 5.32
13751-23140 5.34
13751-23150 5.36
13751-23160 5.38
13751-23170 5.40
13751-23180 5.42
13751-23190 5.44
13751-23200 5.46
13751-23210 5.48
13751-23220 5.50
13751-23230 5.52
13751-23240 5.54
13751-23250 5.56
13751-23260 5.58
13751-23270 5.60
13751-23280 5.62
13751-23290 5.64
13751-23300 5.66
13751-23310 5.68

Wow Ian, thanks! F*in saved. Why do anything but?

Also, you must be a man of incredible patience, having copy/pasted this for 4+ years now

 

[Nick M]

Symptoms will be very mild if at all, in a practical sense. The worst thing you will notice is noise.

 

[te72]

Never thought it was bad dad used it ive always put it in my trucks. is it bad oil for that car?

http://www.supramania.com/forums/forumdisplay.php?108-Motor-Oil-Lubricants-amp-Filtration

Plenty to read in there and come to your own conclusion. I've come to my own conclusion that oil additives are largely (if not entirely) unnecessary, thanks to a LOT of research that has been shared in that section of the forum...