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Loud Ticking under acceleration

1091 Views 13 Replies 8 Participants Last post by  belittle
Hey there.

just recently did a rebuild on my bottom end after spinning some rod and main bearings.
Everything's back together and running good now, but I'm noticing a ticking thats slowly getting louder.

I thought it was lifters at first, but I know it's not that now. For 1, it only appears when I accelerate, and 2, it seems to be a lot quieter when I have the clutch in.

These things also make me believe (and hope) that it isn't a problem with the bottom end or top end for that matter, but more likely something to do in the tranny.

My first guess would be that my flywheel may be coming loose as that has happened before, even though I made sure that they were tight.

Just wondering if anyone else had any other ideas about what could make a noise under those certain conditions, thanks a lot
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good guess, but I forgot to mention that you can still slightly hear it when you rev the car with the clutch in, it's just MUCH quieter. Do you think that could still cause it?
nybody else have any ideas before I tear the tranny off?

and also, stupid question I've never thought of before, would it be ok to turn the engine on briefly with the flywheel on or off to see if the noise is there still.

Thanks
FIRST QUESTION:
Easy answer. Your bearings are going out again. What method did you use in replacing the bearings? Usually there was a reason they spun which was most likely an oiling problem.

You say only when you accelerate it ticks? This is a sign I experience when my #1 rod bearing when out the first and second time. Only when I would put a load on the motor did the bearings tick/knock. Also did you lock tight the flywheel bolts? For your sake just hope its only a simple fix like a bad tob or loose flywheel bolts.

SECOND QUESTION:would it be ok to turn the engine on briefly with the flywheel on or off to see if the noise is there still.

Well think about this, how does the starter attach to the flywheel? If there is no flywheel there will be no way to engage the flywheel and if there is a flywheel you need the tranny attached (or at least the bellhousing) to have the starter stay in place.

One last thing, if it is indeed your flywheel bolts you should physically be able to see them or feel them not torqued down. A case when the flywheel is loose will produce a horrible ticking knocking noise all the time. The motor will also vibrate like a hell.

Hope this help and answer some of your questions.
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Ozziechan said:
Do you think that could still cause it?
Cv axle won't tick when not moving, come on now.
belittle, you made me feel dumb, and thats good I deserved it. I should think for atleast a second before asking a stupid question instead of being lazy.

But yeah, as for the rod bearings going again.... what caused it was the rear balance shaft bearing seizing up, and therefore the oil pump as well, I've replaced the whole front case, pump and all, and I also eliminated the B-shafts, so that problem should be solved and then some.
and when mine did go because of that original problem, it was no knock or tick over time, is was the car losing power and dying with a pinch of horrible grinding noise and knocking all in a minute or so.
I would also think that the rod bearings going would make a more consistent sound, I mean rythym wise, it sounds a lot more random, and atleast SOME sound during idle, I mean it's absolutely silent unless I give it a little gas, even with my head right over the engine bay.......
it looks like your experiencing a 7 bolt problem called crankwalk, it will spin your bearings quickly there is a thread in the advanced tech section that has a thread to a guy who found a fix and garentees it for like, its faitly cheap too.
I dont think there is any need to jump on the crankwalk bandwagon with this one. The symptoms just are not present. Read the post, it ticks under acceleration with the clutch released not pressed.
Ok So we've taken the transmission out and everything looks fine with the flywheel. i'm really running out of ideas here and i'm really hoping that it's not the bearings again because the car has only just been on the road again for 2 weeks since the rod bearings went the last time. Any ideas why they might have spun again seeing as how problems that made them spin in the first place have long since been fixed (i thought so anyway).
Second question, other than a loose flywheel has anyone else experienced these symptoms before, i'd like to talk to someone who has to see if i can fix the problem or prevent it from happening EVER again. also is there anything else that might make that noise.
Third, If it is the bearings again then i'm definitly gonna get rid of this cursed bottom end and buy, either a brand new 6 bolt bottom end or one that has been rebuilt professionally

thanks.
Ozziechan said:
Hey there.

just recently did a rebuild on my bottom end after spinning some rod and main bearings.
Everything's back together and running good now, but I'm noticing a ticking thats slowly getting louder.

I thought it was lifters at first, but I know it's not that now. For 1, it only appears when I accelerate, and 2, it seems to be a lot quieter when I have the clutch in.

These things also make me believe (and hope) that it isn't a problem with the bottom end or top end for that matter, but more likely something to do in the tranny.

My first guess would be that my flywheel may be coming loose as that has happened before, even though I made sure that they were tight.

Just wondering if anyone else had any other ideas about what could make a noise under those certain conditions, thanks a lot
I had the same problem...After a fresh rebuild, the car started out making a slight ticking sound and grew larger within a couple of days. It only grew loud under slight acceleration which was wierd. Anyway, I took it back to the shop and lets just say they had to rip apart the block and replace the rod bearings :(

Hopefully this is not YOUR situation
Did you prime the oil pump before putting the tbelt on?
Ozziechan said:
Third, If it is the bearings again then i'm definitly gonna get rid of this cursed bottom end and buy, either a brand new 6 bolt bottom end or one that has been rebuilt professionally

thanks.
Exactly what I did. Took that 6 bolt out of my car and put a running motor in it. Usually there is an oiling problem when a rod bearing spins. Oil pump was the culprit on mine and most likely on yours. Bearings just don't spin unless there is not enough oil.
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