Noise after changing timing wheel

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Noise after changing timing wheel

Post by roymck » Fri Mar 22, 2019 2:43 pm

Sorry lads , so many questions . Changed the timing wheel for a QRG alloy version . Started car today for 1st time and there seems to be a rhythmic knocking from timing cover . Thought it might be the fuel pump catching so pulled it off and run engine again but its still there.
It want there before , so any thoughts before I pull it all off again . Bolt rubbing on timing wheel?

One day all these questions will stop , I promise !



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Noise after changing timing wheel

Post by philhoward » Fri Mar 22, 2019 2:46 pm

Roll pin that holds the eccentric cam for the fuel pump catching a rib?


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Noise after changing timing wheel

Post by roymck » Fri Mar 22, 2019 3:51 pm

Hi Phil , can’t see how it could be roll pin as timing wheel hole is blind and pump ecentric is in place and fully tightened .
If I turn engine over by hand can’t feel anything touching . Very odd!
My wheel don’t whine it just knocks , when its running you can feel it quite strongly if you put your hands on timing cover .



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Noise after changing timing wheel

Post by Coupe Racing » Fri Mar 22, 2019 5:02 pm

Not being funny but is the bolt holding the cam wheel on tight ?
Is the woodruff key in place ?
Does the knock increase with revs

May be back lash is too big


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Noise after changing timing wheel

Post by Roger Pennington » Fri Mar 22, 2019 5:09 pm

Did you change the front crank oil seal, and did you centre the timing cover on the crank pulley before tightening the bolts on replacement?


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Noise after changing timing wheel

Post by roymck » Fri Mar 22, 2019 6:10 pm

Torqued cam wheel bolt to correct setting, woodruff key in place checked that 1st time . Yes noise increases with revs .
Backlash seemed pretty good when I bolted it all up .
Yes changed the crank oil seal and centred is up best I could , then torqued up crank pulley . Run it without fan belt just in case it was water pump .
Just hope if I strip it down there is witness marks , hate to strip it down and find nothing .



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Noise after changing timing wheel

Post by nickm » Fri Mar 22, 2019 6:17 pm

Which type of front cover do you have?
I have heard the early type can foul the later type wheel.
Although I didn't have that problem myself.



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Noise after changing timing wheel

Post by David Tew » Fri Mar 22, 2019 6:19 pm

Strange one there Roy. All good suggestions above.

A couple of other thoughts. If you can actually feel the vibration through the cover I would suspect it's the wheel catching somewhere ... perhaps on one of the bolts holding the cover plate to the engine?
A really unlikely one (but everything is worth considering), is the new wheel exactly the same width as the original? If it's even slightly thicker it could well cause interference issues.

I think the best option is to remove the new gear and inspect it. A hassle I know but you'll soon see if it's catching anywhere. If it's clean then it must be a fitting issue.

Don't give up. As Churchill said, “Never give up on something that you can’t go a day without thinking about”. :wink:


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Noise after changing timing wheel

Post by roymck » Fri Mar 22, 2019 6:36 pm

nickm wrote:
Fri Mar 22, 2019 6:17 pm
Which type of front cover do you have?
I have heard the early type can foul the later type wheel.
Although I didn't have that problem myself.
Early type !



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Noise after changing timing wheel

Post by rebel alliance » Fri Mar 22, 2019 7:46 pm

Fuel pump fixing stud ?



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Noise after changing timing wheel

Post by roymck » Fri Mar 22, 2019 8:33 pm

rebel alliance wrote:
Fri Mar 22, 2019 7:46 pm
Fuel pump fixing stud ?
Possibility but would think that’s more consistent noise . Looking more likely it’s all got to come apart again .



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Noise after changing timing wheel

Post by rebel alliance » Fri Mar 22, 2019 8:41 pm

If the wheels got a slight wobble it may be hitting one of those studs...take the pump off and look for marks 😊



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Noise after changing timing wheel

Post by Coupe Racing » Fri Mar 22, 2019 9:14 pm

How about posting a short video clip


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Noise after changing timing wheel

Post by roymck » Tue Mar 26, 2019 11:11 am

nickm wrote:
Fri Mar 22, 2019 6:17 pm
Which type of front cover do you have?
I have heard the early type can foul the later type wheel.
Although I didn't have that problem myself.
You could be right , pulled the timing cover off and yes there is a mark . It’s an early style cover and it’s rubbed on the casting or at least that’s what it looks like . Going to grind it down and refit it hopefully that will cure it.
9B043AC6-6EF6-4F70-9E53-3A14BA9D8CD2.jpeg
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9BCF8D8C-003F-47A0-8F5A-A61E347457D7.jpeg
9BCF8D8C-003F-47A0-8F5A-A61E347457D7.jpeg (342.63 KiB) Viewed 1330 times



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Noise after changing timing wheel

Post by nickm » Tue Mar 26, 2019 12:28 pm

Excellent!
Hope it sorts it.



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