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Noise after changing timing wheel

Posted: Fri Mar 22, 2019 2:43 pm
by roymck
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 !

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 2:46 pm
by philhoward
Roll pin that holds the eccentric cam for the fuel pump catching a rib?

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 3:51 pm
by roymck
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 .

Noise after changing timing wheel

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

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 5:09 pm
by Roger Pennington
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?

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 6:10 pm
by roymck
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 .

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 6:17 pm
by nickm
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.

Noise after changing timing wheel

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

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 6:36 pm
by roymck
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 !

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 7:46 pm
by rebel alliance
Fuel pump fixing stud ?

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 8:33 pm
by roymck
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 .

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 8:41 pm
by rebel alliance
If the wheels got a slight wobble it may be hitting one of those studs...take the pump off and look for marks 😊

Noise after changing timing wheel

Posted: Fri Mar 22, 2019 9:14 pm
by Coupe Racing
How about posting a short video clip

Noise after changing timing wheel

Posted: Tue Mar 26, 2019 11:11 am
by roymck
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.
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9BCF8D8C-003F-47A0-8F5A-A61E347457D7.jpeg
9BCF8D8C-003F-47A0-8F5A-A61E347457D7.jpeg (342.63 KiB) Viewed 1711 times

Noise after changing timing wheel

Posted: Tue Mar 26, 2019 12:28 pm
by nickm
Excellent!
Hope it sorts it.