help broken 4age

**Draven** · 14-07-2009, 03:20 PM

does noise go away if you start it up then depress clutch? or change at all?

**adam-__-** · 14-07-2009, 03:24 PM

Having the motor running and depressing the clutch, the noise dies down. It goes away like when the motor is revved up a little. The noise is quieter, but it is still there.

I haven't been in touch with sexybackra28 yet to know what the progress is with the motor. When I last heard, the gearbox was being pulled out.

**abently** · 14-07-2009, 04:25 PM

Possible no3 Main cap thrust bearing worn out ?

Usual result after using a HD pressure plate on possibly Aluminium type mains bearings etc.

Hopefully its just a loose PP or flywheel.

**Yian** · 14-07-2009, 04:36 PM

Originally Posted by abently

Hopefully its just a loose flywheel.

Hah just a loose flywheel? Some of the pics I've seen of flywheels coming off, I'd rather have a dead engine.

**frostyadonis** · 14-07-2009, 06:48 PM

the sound of the engine in the video is not of your engine

am i reading right.

does it have a broken cat? they do rattle more at idle.

the engine will tend to grab then release when turning by hand on a good engine, the cam load on the valve springs have to do with this.

**adam-__-** · 14-07-2009, 07:27 PM

The youtube clip is just for reference. It sounds exactly the same. Rattling at idle and as soon as you rev it, the sound will die out a little then come back when settling down again at idle.

I don't think the rattling is from the cat. The motor may be idling at the same resonance frequency as a loose bolt, but it's definitely coming from the bottom end/motor somewhere.

When turning the motor over by hand, it's definitely not a normal feeling. hahaha. I'm running a 4AGE in my car as well and it doesn't feel like sexybackra28's motor. I remember turning his motor over by hand before the noise was heard, before the motor was even started during the conversion and it didn't feel like this.

I know it's a bit hard to diagnose a problem over the internet, but I'm/we're just after ideas and experiences of what it could possibly be. Would hate to pull the motor all apart to find out it's something like the TVIS rattling (which it's not by the way

).

What I find strange is that the noise came out of nowhere overnight. Running fine night before, but the next morning it starts to play up.

**Sagluren** · 14-07-2009, 07:28 PM

im going with loose PP bolt or something like that. the fact that the noise dies down when the clutch is used says it would have to be up that end of the engine.

edit: could be a cracked flywheel, getting hot then cooling (puddle of water ie) might crack it. i had a commodore in work that this had happend to, but that was a commo and shit.

cheers

**Javal** · 14-07-2009, 08:59 PM

Originally Posted by adam-__-

Having the motor running and depressing the clutch, the noise dies down. It goes away like when the motor is revved up a little. The noise is quieter, but it is still there.

I haven't been in touch with sexybackra28 yet to know what the progress is with the motor. When I last heard, the gearbox was being pulled out.

Input shaft bearing / spigot bearing (although this is normally more of a squeal) / release bearing.

It could even be that the clutch plate spline has eaten itself. It happens.

**sexybackra28** · 14-07-2009, 10:41 PM

thanks for all your input guys since there has been a confusion i have decided to pload a video of my car with the problem. btw its a t-18 with a 4age conversion with a t-50 behind it.

heres the first link of start up sounds like a desial(spelling) motor lol

http://www.youtube.com/watch?v=jT_8e4EfQpg

and heres the second link of the 4age with the clutch in and out making sligtly different sounds

http://www.youtube.com/watch?v=uK16WaNsjS4

appreciate all the help i can get guys

cheers

**mullett** · 14-07-2009, 10:41 PM

I'd agree with that, something in the clutch/release/spigot area. T50 weighs about as much as a small cat, so won't take you long to pull it off and have a look

-RM.

**Javal** · 14-07-2009, 10:47 PM

That's a freaking weird one.

Makes me think input shaft bearing.

Pull the box out.

**sexybackra28** · 14-07-2009, 11:55 PM

yep im setting the alarm at 11am and going to start taking off the gbox at first iwas comtemplating but now since most toymodders say its something to do with the gbox.clutch spigot bearing stuff i guess i going to have to see.

thank you fellow toymodders i'll findout whats happening

cheers

**sexybackra28** · 16-07-2009, 04:56 PM

hello fellow toymodders again, well i removed my gearbox and check the clutch fywheeland spigot bearin and they seem to be in tip top shape. i even removed the bell housing from the gearbox and attached te starter and crank and stil the same sound in the 2 above videos and i tried this again with just the fly wheel and still the same thing. so do you guys think its my bottem end giving you???

would appreciate input guys

cheers

**IAN20V** · 16-07-2009, 05:07 PM

i believe its called the 4age death rattle

rod bearing or oil pump?

could be timing related, maybe a cam gear has jumped a tooth or something

**adam-__-** · 16-07-2009, 05:31 PM

Originally Posted by IAN20V

i believe its called the 4age death rattle

rod bearing or oil pump?

could be timing related, maybe a cam gear has jumped a tooth or something

I was thinking that too at the beginning, but I don't think it's possible for it to make that noise if it were the case. This is only a standard 4AGE and they came from factory as a non interference motor so valves shouldn't be touching pistons if the belt were positioned wrong.

We've got to start pulling the motor down, take a look at everything else and hopefully the head is all good.

7AGE time!