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2001 subaru liberty ej25 sohc knock


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#1 Dylan720

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Posted 05 September 2017 - 04:35 AM

Hi all i recently replaced my head gaskets on my 2001 subaru liberty ej25 sohc engine. I had the head cleaned shaved and new valves put in it i put the engine back togeather with manual specfications. Just to have the engine knock on idle when i accelerate it sounds ok. In saying that if i have the fan belts on the engine will not accelerate if i have the belts off it accecerates. I dont really know what could be the cause of it any help would be great thanks.

#2 Barbbachello

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Posted 05 September 2017 - 09:37 AM

When you say knock do you mean detonation or rod knock? 

Are you sure you put the timing belt back on properly?



#3 Dylan720

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Posted 05 September 2017 - 09:57 AM

It dont seem to be knock like eather deternation or rod cause when you accelerate it goes away its only on idle it does it and yes the timing is done properley i done it by the marks and set 1st position to middle dead center as it says in the manual

#4 El_Freddo

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Posted 05 September 2017 - 10:59 PM

I had this issue with our EJ251. It'll be your cam belt tensioner. If you can get a solid bar on the cam cover bolt closet to the tensioner you'll hear it clear as day, on the other side of the crank it's quiet. Bottom end quiet too.

If there's any oil sitting atop the piston area of the tensioner replace it.

Cheers

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#5 Dylan720

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Posted 05 September 2017 - 11:59 PM

Its a brand new timing kit including tensioner

#6 Beckers

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Posted 11 September 2017 - 10:57 PM

Did you adjust the tappet clearances as per the manual ??

Double check timing.



#7 Dylan720

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Posted 12 September 2017 - 05:36 PM

Yes they were adjusted by the manual and the timing has bee cnecked 3 times

#8 Dylan720

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Posted 30 September 2017 - 07:02 PM

Anybody here now how to upload a video i have one of the engine running on acceratuon and idle and you can here the knock and see the shake in it also the catalytic converter is glowing red and a massive flame is coming out the exhaust to

#9 duncanm

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Posted 30 September 2017 - 08:06 PM

seriously sounds like the valve timing is out.

 

There have been reports of non-OEM tensioners being completely shite and failing upon installation -- could this be the issue?



#10 Dylan720

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Posted 30 September 2017 - 08:16 PM

Well its a brand new timing kit with tensionor and the mechanic who came over and installed it after i baught it said it was good
Is there anyway i can send a video to you of it running

#11 duncanm

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Posted 30 September 2017 - 09:47 PM

Have a look at the cam belt while its running (belt cover off) - it should be obvious if its flapping around or not.

 

Also take a pic of the cam and crank timing marks

 

In particular - note the arrow on the crank is NOT the alignment mark.

2012-10-27_023042_newer_2.5_cam_belt.jpg

 

 

2011-02-20_142656_image_002.jpg



#12 Dylan720

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Posted 30 September 2017 - 10:39 PM

Yeah ive looked at that the tensionor is fine the timings set right when it revs its fine backfires but no knocking at all bit at idle it shakes knocks then dies

#13 duncanm

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Posted 01 October 2017 - 07:26 AM

well - its clear that a whole shite load of unburnt fuel is being dumped in the exhaust for some reason.

 

Other options are something wrong with the injectors, or more likely, no spark on some cylinders. I'd start there.



#14 Dylan720

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Posted 01 October 2017 - 06:19 PM

Yeah thats what im thinking to mate is there anyway i can send you a video of it running thow see if maybe you mihht be able to pinpoint it at all

#15 El_Freddo

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Posted 01 October 2017 - 11:43 PM

Upload vid to YouTube and drop link in here ;)

A red cat converter wasn't one of our issues, nor was the engine shaking at idle.

I can't really help any further on this one sorry.

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#16 Dylan720

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Posted 08 October 2017 - 01:18 PM

Could the cams be in the wrong place like or wrong heads can that happen cause thats the only thing left i can think of

#17 crjohnson

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Posted 08 October 2017 - 09:36 PM

Pull all the spark plugs out and see if any are a different colour to the others. 1 might be black, ie not running..

#18 Dylan720

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Posted 08 October 2017 - 11:52 PM

There all black i put 4 brand new ones in the other day and ran the car for 30 seconds and pulled them out there pure black and wet

#19 duncanm

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Posted 09 October 2017 - 07:45 AM

Are valve clearances ok?



#20 Dylan720

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Posted 09 October 2017 - 12:23 PM

Yeah they have been checked by 4 mechanics now only thing one of them can think is the cam shafts have been put in the wrong head right one in the left head and vise verser but he said he wasnt 100% sure if that was even possible




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