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John Loh
Tinkerer
WA
SC400 (31)

Posts: 12
Reg: 09-2007

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Saturday, October 06, 2007 - 12:13 pm, by:  John Loh (Johnathanloh) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Hey guys, i've done some research and discovered that the ticking noise from my engine could be:

-shims

or

-leaky exhaust manifold

How do i check for the latter?

I also observe that my engine "spits" some kind of liquid out when i rev it, is this normal? I don't know what liquid it is, i only saw it come out when i removed my exhaust from the middle bolt back. I can hear the liquid splash on the pipes as i drive, what could this be?
Tai Johnsen
TryHard
QLD
UZZ31 - V8

Posts: 384
Reg: 04-2006

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Saturday, October 06, 2007 - 02:03 pm, by:  Tai Johnsen (Privatejohnsen) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Is it black watery kinda stuff?

If it is, it's probably just water that has condensed inside the pipes overnight.

Leaky exhaust manifold will sound horrible under load as more gas escapes past the gasket.
John Loh
Tinkerer
WA
SC400 (31)

Posts: 13
Reg: 09-2007

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Tuesday, October 09, 2007 - 01:33 pm, by:  John Loh (Johnathanloh) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Must be the shims then (damn!)
Thanks
John
Ben Kelly
TryHard
Lidcombe
v8

Posts: 244
Reg: 08-2005

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Tuesday, October 09, 2007 - 06:08 pm, by:  Ben Kelly (Ace) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

John i was advised that changing the oil can occasionally stop noise from the shims...although this has never worked for me so im sceptical. Shims shouldnt cost you too much, so dont sweat it.
Mike Beck
Goo Roo
New Zealand
Celsior UCF11 V8

Posts: 1538
Reg: 11-2005

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Tuesday, October 09, 2007 - 06:31 pm, by:  Mike Beck (Gold_40gt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)


Ben Kelly wrote on Tuesday, October 09, 2007 - 06:08 pm:

Shims shouldnt cost you too much, so dont sweat it.




If its done by a mechanic, they usually charge around $1000+ for the job from what Ive read in the past! :-(
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 3101
Reg: 10-2005

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Wednesday, October 10, 2007 - 06:12 am, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

If you can do the job yourself (and its really not difficult provided you have an eye for detail and the required tools, just time consuming and fiddly) it'll cost very little.
John Loh
Tinkerer
WA
SC400 (31)

Posts: 14
Reg: 09-2007

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Friday, November 09, 2007 - 02:04 pm, by:  John Loh (Johnathanloh) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Yeah, i'm planning to do the shims after exams. Just a bit weary about doing the surgery.. never opened up an engine before but can't wait. I read that you can take off the exhaust cam easily, but what do you look for when re-inserting it? i.e. what marks do you look for when aligning it back up with the intake cam? I'
Scott Ferguson
DieHard
Alberta
Soarer GTT-L

Posts: 857
Reg: 07-2006

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Saturday, November 10, 2007 - 02:37 am, by:  Scott Ferguson (Scott_ferguson) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

What kind of ticking noise? Are you sure it's not just regular injector noise?
Evan Kaio
Tinkerer
Wellington
'91 UZZ31

Posts: 21
Reg: 01-2007

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Saturday, November 10, 2007 - 03:37 pm, by:  Evan Kaio (Knave) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Or the carbon cannister?
Matthew Sharpe
Goo Roo
North Island
JZZ31

Posts: 3187
Reg: 10-2005

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Saturday, November 10, 2007 - 04:09 pm, by:  Matthew Sharpe (Madmatt) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

John, you don't need to remove the camshafts to replace the shims - you just need the right tool to depress the bucket - you can order it from Toyota - that and a high quality micrometer and feeler guages will make life a lot easier.

Last time I did a job like this was on a 2 litre TR7 engine, and you did have to remove the camshaft to do it in that engine (as the buckets sit on top of the shims - stupid layland designers!). Unfortunately my micrometer was faulty so after I ground and replaced the shims and remounted the camshaft the feeler blades revealed that it was even worse than before I started!}
John Loh
Tinkerer
WA
SC400 (31)

Posts: 15
Reg: 09-2007

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Friday, November 30, 2007 - 06:39 pm, by:  John Loh (Johnathanloh) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

Okay, after a lot of farting around i'm going to do this project. The tutorial tells me i have to measure clearances, what exactly is this clearance (between where and where?) I assumed it was between shim and cam lobe tip but this means that the cam lobe has to be vertical? Or can you measure the clearance to any from the shim to any part of the camshaft directly above? (sorry, have not taken apart an engine before). Also, i heard that if a bucket is rooted you have to take it out. Is this part expensive? Oh and is the tutorial on
http://planetsoarer.com/camshafts/camshaft4.html
sufficient for the work or do I need a Soarer Bible workshop manual?
John Loh
Tinkerer
WA
SC400 (31)

Posts: 16
Reg: 09-2007

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Friday, November 30, 2007 - 06:40 pm, by:  John Loh (Johnathanloh) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

*i'm doing this because I just changed the oil and the noise is still loud as ever*
Thanks guys
Cihan Aday
Moderator
www.etuner.com.au
JZZ30

Posts: 2284
Reg: 07-2005

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Saturday, December 01, 2007 - 06:49 pm, by:  Cihan Aday (Cihan) Quote hilighted text Edit Post Delete Post Print Post   View Post/Check IP (Moderator/Admin Only) Move Post (Moderator/Admin Only)

John some Lucas Oil treatment and a thicker visc oil will help the situation, the oil acts as a buffer and helps absorb some of the shock associated with increased clearances.

If you've never opened an engine up, its foolish to think you'll get away with re-shimming financially unscathed ;)

Leave it to a professional or live with it is my opinion. Unless you're very keen, its a steep learning curve that needs attention to detail and potentially expensive tools.

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