Hi Guys,
My engine/transmission had a bit of a rattle when the engine was running in neutral.
If you pressed the clutch it seemed to disappear, sounded like a release bearing to me...
Anyway was driving the other day and my throttle got stuck and revved quite high but not for long till i cut the engine.
Fixed the throttle fine but since that there is a massive rattling noise even when driving which wasn't there before.
I have taken the engine back out of the car assuming that it is the release bearing but have just thought that i'm not really that sure.
I know this is probably a bit ambiguous, but is there any way to diagnose or test a release bearing or maybe gearbox for being knackered?
Any help appreciated.
Thanks,
Andy
Hi Andy
With the release bearing in your hand, and spinning it, is it rumberly/notchy as if not, then its fine!
Steve
Not to be a monger of doom , but that does not sond like a release bearing issue?
Sound more like something loose, chain tensioner or something?
Did you forget the spiggot bearing in the fly wheel?
Better yet, forget the hassle and take my crossflow off me! It's brand spankers
Anyways, does it seem like engine or the box?
Cam chain would be on the front of the engine, much movement on the box input shaft?
there is some movement on the gearbox shaft, how much should there be? i reckon there's a couple of mm in all directions
as for spigot bearing in the flywheel, probably sounds quite dumb but i didn't even know they had one!!
should EVERY flywheel have one?
Yep, in the end of the crankshaft,
its a roller bearing
Steve
Going beyond the redline is unlikely to damage the clutch release bearing but is much more likely to be an engine internal, my first suspect would
be a bent valve or two but it could be anything.
I would help to know what engine you have ?
[Edited on 21/8/13 by britishtrident]
it's a pretty standard 1300 crossflow.
pretty sure i did go over the redline for a second or two...
sounds like a bag of nails at idle, ok at low to mid revs, and back to bag of nails at high revs
Quick and easy;- take the rocker cover off and do a quick check on the valve clearances. Any bent valves (or broken springs) will show up with much
larger/big clearances.
Ian
If you have any bent push rods, I do have 4 1300 ones
Steve
quote:
Originally posted by pekwah1
as for spigot bearing in the flywheel, probably sounds quite dumb but i didn't even know they had one!!
should EVERY flywheel have one?
Thanks guys, i'll double check about the spigot bearing.
As for the valves, unfortunately it might be this.
I did some googling on "bent valves" and this sounds quite similar to the noise i was getting.
Steve, i'll whip the rocker off tonight and have a look at clearances, i'll brace myself for the bad news!
just to add a brighter note - I was half convinced I'd bent some valves on my old fiesta (almost the same engine)
turned out one of the rocker bolts had sheared - checked everything over twice and couldn't find anything else at all not even a bent
pushrod...
one new bolt (for about 25p) and a couple of new gaskets and it was sorted 
I didn't even have to adjust the clearances when it went back together 
[Edited on 22/8/2013 by mcerd1]
That's not going to help me when i find out that i have holes in the side of my engine now is it? 
out of interest, how do you check valve clearances inside the rocker cover?
I thought you check the clearance between the piston and the valve?
M8, are you about Monday? as I will pop over and check the clearance's
Steve
^^ its the clearance between the cam and the valve you check/set (or in your case between the rocker and the valve) - aka: the tappet clearance
cheers steve, that would be a big help, you know what i'm like with engines!
what kind of time would you be around?
Just in case you guys were wondering....
So we had a look at the engine valves tappets and pushrods.
Needed to adjust the rocker clearances a bit but otherwise all looked good!
Found the source of the noise and rattle tho, it appears all 6 of the flywheel bolts had come loose!
A bit of elbow grease and some thread lock and hopefully that's that!
A massive thanks again to Stevem for helping me out, wouldn't know what I'm doing with an engine on my own!
quote:
Originally posted by pekwah1
as for spigot bearing in the flywheel, probably sounds quite dumb but i didn't even know they had one!!
should EVERY flywheel have one?
"No.. Mostly older engines feature these. Easy to test /feel, as if the screeching sound they make wasn't enough.
Input shaft bearings First one(s) in the trans input shaft are typical wear out items on an older box.
Often heard as a hisss sound when gearstick is in neutral and the engine is running.
Or play in the input shaft when one wiggles the thing.
Inexpensive bearing(s) to buy but one does have to then insert them :-)"
WTF are you talking about ??
Bare are you for real, or just some 12 year old looking for kicks ? as if so go and find some xbox for 10 year olds
As for my m8 Andy, good to see you again, and some ,more progress (until he sheared a bolt in the fly wheel ...................)
all sorted now!!
steve
quote:
Originally posted by pekwah1
Found the source of the noise and rattle tho, it appears all 6 of the flywheel bolts had come loose!
A bit of elbow grease and some thread lock and hopefully that's that!
Yeh that was my thought too, especially with my soft as butter aluminium bell housing!
" soft as butter aluminium bell housing! "
Oh, YES !! and if it had been in my car, I would of polished it