19 replies to this topic

[Ren-dog]

So i fired up the liberty last night to make sure it doesn't hydrolock because of the head gasket leak. When it started it had a knocking/clicking sound that i could hear over my exhaust, it didnt go away or get quieter. It still has plenty of oil.

Wondering what it could be? Its coming from the same side of the engine as the oil leak. I will try and get a video latter.

I'm just wondering if its a major thing, because if its something big then i would be better off buying a reconditioned engine for it than just fixing the head gasket.

[AussieTemplar]

EDIT: To avoid a ban, I'll offer some advice. Get a video up, it's hard to diagnose strictly through RenScripture.

[Ren-dog]

Video is up.


There is plenty of oil and coolant.

[Adam]

Kinda sounds like my old car with noisy lifters. Dunno if the DOHC models are the same

[Ren-dog]

Only been doing it since i started it sunday night.

[Scott]

LOLL^^

big end bearing

[aekOne]

yeah sounds like a big end bearing to me too. reminds me of the sound out of turn two at wakefield heading up the hill...

[Ren-dog]

Replacement engine it is...

Could it have been from hydrolocking?

[Aaron.W]

yeah as aek and scott said its sounds like big end bearing.. main cause of big end failure is lack of oil to the beasrings

[CodeBurn3r]

doubt it would have hydrolocked mate..

if anything maybe your oil was contaminated..

my engine is going cheap soon.. (Waiting for tax time)
Hint Hint

[RX25SE]

I have this piece of string but Im not sure how long it is............






Unplug the injectors one at a time and see if the noise changes. The lack of a power stroke on that cylinder will take to load off the big end for that cylinder.

If you can't unplug the injectors easily, pull a plug lead but fit an old plug to the lead and rest the plug on the engine so the plug can discharge the spark. This will prevent you from frying the ignition system.


I cant see how a big end can fail from being parked.

[Adam]

I cant see how a big end can fail from being parked.

Thats what I thought!

[Ren-dog]

I have this piece of string but Im not sure how long it is............






Unplug the injectors one at a time and see if the noise changes. The lack of a power stroke on that cylinder will take to load off the big end for that cylinder.

If you can't unplug the injectors easily, pull a plug lead but fit an old plug to the lead and rest the plug on the engine so the plug can discharge the spark. This will prevent you from frying the ignition system.


I cant see how a big end can fail from being parked.

Will give this a go tomorrow if i have the time after work.
Cheers.

[Ren-dog]

Ok i tried unpluging the injectors one by one, still makes the same noise.

[Adam]

I still think its lifters (are they hydraulic on a DOHC?)

[RX25SE]

Ok i tried unpluging the injectors one by one, still makes the same noise.

Did the noise CHANGE at all?

[Ren-dog]

It was slightly quieter with the front driver side injector unpluged. Same noise but a tad quieter.

[CodeBurn3r]

dude, spend $30 buy engine oil flush, add to oil, run for 10 minutes, dump oil, start fresh..

same noise, give up.. noise gets better, your winning

also.. get a long screwdriver
put ear on handle, end of driver on different engine parts... listen to where its loudest..


back in the day i had a bad noise like that i freaked, i had just changed HG myself..

5000k and it was making really horrible knocking sounds... did that and found it was actually just a cam cap that was loose and hitting the valve cover...
3 hours of fiddly 'ing annoying bolts n removing valve covers with engine in car.. fix the problem - been fine since!

if it is big end then your not going to exactly make it worse unless you go revving its tits off cold start

[Ren-dog]

Ill give it a go next week. Thanks mate.

[bd-850]

my 2 thoughts, Big end bearing (just done mine so the noise is fresh in my head ) or timing belt pully