Saturday, October 06, 2007 - 12:13 pm, by: John Loh(Johnathanloh)
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?
Tuesday, October 09, 2007 - 06:08 pm, by: Ben Kelly(Ace)
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.
Wednesday, October 10, 2007 - 06:12 am, by: Matthew Sharpe(Madmatt)
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.
Friday, November 09, 2007 - 02:04 pm, by: John Loh(Johnathanloh)
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'
Saturday, November 10, 2007 - 04:09 pm, by: Matthew Sharpe(Madmatt)
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!}
Friday, November 30, 2007 - 06:39 pm, by: John Loh(Johnathanloh)
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?
Saturday, December 01, 2007 - 06:49 pm, by: Cihan Aday(Cihan)
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.