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2ltr Aircooled engine knocking
Posted: 05 Jul 2012, 09:03
by MOLEMAN
Hi just installed a second hand engine ,I got it running without the airbox connected ,switched it of then connected the airbox and started her up ,now see sounds like a tractor .does anyone know what the problem could be ,cheers lee
Re: 2ltr Aircooled engine knocking
Posted: 05 Jul 2012, 17:38
by sarran1955
Hello,
I'm very sorry........
But my crystal ball in in for re polishing.
Please go into a little more detail, type of engine....
What did it replace....
What was done to the donor engine before fitting....
Little details like that
A few photos , or even a video is good,
Cordialement,
Re: 2ltr Aircooled engine knocking
Posted: 05 Jul 2012, 18:46
by MOLEMAN
sorry
its a cj coded engine.
it replaced a 1600 ct engine (rubbish).
nothing was done to the donor it was put staight in as it was .
sorry for the lack of info as never worked on engine's much ,trying to muddle through as on a very tight budget ,
so trying to do the work myself
cheers lee
Re: 2ltr Aircooled engine knocking
Posted: 05 Jul 2012, 18:51
by Dazco
Did it sound ok without the airbox connected.
Re: 2ltr Aircooled engine knocking
Posted: 05 Jul 2012, 19:09
by MOLEMAN
hi
yes it sounded ok .i put the airbox on and started her up and she sounded crap and there after with or without the air box
cheers lee
Re: 2ltr Aircooled engine knocking
Posted: 05 Jul 2012, 20:26
by 82JEW75
Got oil?
Got oil pressure?
Might sound like stating the obvious, but that's where I'd start.
Re: 2ltr Aircooled engine knocking
Posted: 06 Jul 2012, 11:16
by faggie
did you put the airbox on straightaway after it was run , or did you leave it overnight then fit the airbox if its the latter its probably a lazy hydraulic lifter what just needs the engine running longer to build up pressure in the hydraulic tappet
Re: 2ltr Aircooled engine knocking
Posted: 06 Jul 2012, 21:41
by 988mick
it might be your carb popping,my carbs were back firing a small bit and it sounded like she was knocking.check for air leaks.if any of the vac hoses are old replace them and if its twin carbs it might need to be balanced otherwise might be a bit of piston slap.
Re: 2ltr Aircooled engine knocking
Posted: 08 Jul 2012, 15:13
by john1
faggie wrote:did you put the airbox on straightaway after it was run , or did you leave it overnight then fit the airbox if its the latter its probably a lazy hydraulic lifter what just needs the engine running longer to build up pressure in the hydraulic tappet
If its this a wee drive will get the pressure up, worked for me.
Re: 2ltr Aircooled engine knocking
Posted: 08 Jul 2012, 16:40
by fullsunian
Tappet rattle, especially if its stood for a long time....cross your fingers and run it up should stop after a while but could take a good while