LS1 Squealing noise
Thread Starter
Teching In
Joined: Mar 2012
Posts: 31
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From: Scotland
LS1 Squealing noise hi all
this is my MK2 Escort with LS1 conversion over in Scotland, as you can hear its got a loud squealing noise when running, i disconnected the belt and its still there, any ideas what i could be ? could it be the cam ? no idea of engine spec i presume its std, you dont hear noise when engine is on load just on idle and slightly when cruising
https://www.youtube.com/watch?v=AhX6...ature=youtu.be
many thanks
cheers
Finlay
this is my MK2 Escort with LS1 conversion over in Scotland, as you can hear its got a loud squealing noise when running, i disconnected the belt and its still there, any ideas what i could be ? could it be the cam ? no idea of engine spec i presume its std, you dont hear noise when engine is on load just on idle and slightly when cruising
https://www.youtube.com/watch?v=AhX6...ature=youtu.be
many thanks
cheers
Finlay
Thread Starter
Teching In
Joined: Mar 2012
Posts: 31
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From: Scotland
hi Folks
thanks for reply, defo not water pump or any pulleys as ive changed the water pump and ran the engine with the belt off and squealing noise is still there, it could be oil temperature related as it doesnt happen all the time, it only happens when the engine is really hot, im gonna try a more thicker heat resistant oil to see if that helps, i currently run Royal Purple 10W 40
has anyone had issues like this before ?
many thanks for any help :-)
Finlay
thanks for reply, defo not water pump or any pulleys as ive changed the water pump and ran the engine with the belt off and squealing noise is still there, it could be oil temperature related as it doesnt happen all the time, it only happens when the engine is really hot, im gonna try a more thicker heat resistant oil to see if that helps, i currently run Royal Purple 10W 40
has anyone had issues like this before ?
many thanks for any help :-)
Finlay
Thread Starter
Teching In
Joined: Mar 2012
Posts: 31
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From: Scotland
many thanks for reply
thanks for reply, could you give me some idea of the "number of items" ? im thinking cam ?
cheers
Finlay
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Teching In
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From: Scotland
TECH Fanatic
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From: Auckland, Nth Is, New Zealand.
Stick a srew driver to your ear with belts off & see if you can trace the noise
As has been said, PCV will squeal and make a hell of a noise
Teching In
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My cam most certainly did squeal, kind of like a chirping sound. Wasn't too noticeably at startup but then got louder as it warmed up. Cam took a crap and chewed up the lifters (Futral F13)
Teching In
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How is your oil pressure??
That sounds to me like a bearing, or at least a rotational noise of some sort. Vac leaks will typically have a more hissy or whistley sound to them, and would probably get louder with more air flow.
I had a similar noise with the VG motor that used to be in my Z. The water pump pulley was rubbing on the lower timing cover as I had installed it slightly out of alignment. It sounded almost exactly the same, and it made more noise when it was hot because everything would expand slightly and rub harder.
That sounds to me like a bearing, or at least a rotational noise of some sort. Vac leaks will typically have a more hissy or whistley sound to them, and would probably get louder with more air flow.
I had a similar noise with the VG motor that used to be in my Z. The water pump pulley was rubbing on the lower timing cover as I had installed it slightly out of alignment. It sounded almost exactly the same, and it made more noise when it was hot because everything would expand slightly and rub harder.
Last edited by MaxxAction; Aug 5, 2014 at 09:04 AM.
What was the onset of the issue? Has this motor always made this noise or did it perhaps come up after a missed shift or otherwise stressful event? Have you eliminated drivetrain-related items like pilot bushing/clutch(if equipped), torque converter, etc? Is it any louder under the car than under the hood? Not likely but all easier than a rebuild!
Longer shot - I assume you don't have A/C on that thing..but it does run off a separate belt.
Good luck!
Longer shot - I assume you don't have A/C on that thing..but it does run off a separate belt.
Good luck!
Thread Starter
Teching In
Joined: Mar 2012
Posts: 31
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From: Scotland
hi folks, just found this vid on Youtube
mine is exactly the same
will try the PCV tubes in morning :-)
thanks for all the help, fingers crossed this is the prob :-)
Finlay
mine is exactly the same
will try the PCV tubes in morning :-)
thanks for all the help, fingers crossed this is the prob :-)
Finlay
Last edited by Finlay Macpherson; Aug 4, 2014 at 03:37 PM.
Ha! We get so caught up in being smart guys we forget to check the simple stuff! Now that's where it could tie back into PCV.. It may just be a leaky gasket on the filler cap but also PCV is what causes the vacuum in the crankcase and therefore suction at the cap. So if fooling around with the cap doesn't fix it, you may look to PCV.
Good find!
Good find!
Thread Starter
Teching In
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From: Scotland
hi Folks
update - prob solved, i had the PCV vent going into the top of the TB instead of into the inlet manifold port just below the TB one
phew !!!!!!!!!!! thanks for all the help :-)))))
Finlay
by the way i removed the PCV valve when i first installed the engine, has any one had issues with removing it ? cant see any oil in hoses so far
cheers
update - prob solved, i had the PCV vent going into the top of the TB instead of into the inlet manifold port just below the TB one
phew !!!!!!!!!!! thanks for all the help :-)))))
Finlay
by the way i removed the PCV valve when i first installed the engine, has any one had issues with removing it ? cant see any oil in hoses so far
cheers
Never removed the PCV altogether..it's a $3 part so I never really resented it. What did you run the hose into/onto then? If you are running any kind of crankcase ventilation I would still rig up a proper catch can. Surprised you don't see any oil in any of the lines. That's the LS dirty intake curse and is still a real design head-scratcher for me. But I'm dealing with it..with a catch can.
Good luck!
Good luck!