Rank: Member
Groups: Registered
Joined: 14/06/2007(UTC)
Posts: 582
|
So, put my re-rebuilt motor (202) and box in. Drama. BAH! Motor was fine when it came out. I put in a new, slightly larger cam and the new valve springs. Used alloy timing gears (found mine was cracked, and an old crack too, not fresh and shiney). Now theres a noise i just can't solve. Doesn't seem to be valvetrain cause i pop the rocker cover and they're all firm. The noise seems lowish, at the front of the motor, doesn't sound bottom end.
It DOES sound like what would happen if a cam gear was loose, that sort of mechanical tappy whirring noise. But it's brand new and pressed on well, and the motor's running nice and strong?
I know this sort of diagnosis is always a guesstimate, but it never hurts to ask. |
"Silly modern cars" |
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
I would take the fan and belt off, and use a stethoscope/big screwdriver/hose to listen to it and try to determine where its coming from. Try listening along the cam gallery and sides as well as the front and see if you can tell if the noise is at cranksh
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 14/06/2007(UTC)
Posts: 582
|
Cheers. I used a stethoscope, and yeah, end float came to mind. Must confess i didnt check float on assembly...silly mistake, whether thats the problem or not. And that means pulling the motor again.
Yay......... |
"Silly modern cars" |
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 11/06/2008(UTC)
Posts: 17
|
I have had this problem like this before it was the wrong timing gear set some had metric gears and some had imerial cut gears also changed back to fiber gear if still avlable alloy one seems to noisey maybe check cam bearings if posable hope this helps
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 5/05/2006(UTC)
Posts: 73
|
are you sure that you didnt buy straight cut gears instead of helical cut gears. They have a distinct noise about them.
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 14/06/2007(UTC)
Posts: 582
|
Oh, theyre helical, and the noise is far too rough to be that. Its not totally consistant, just always there, and rises with the revs, so its a rotating part of course. |
"Silly modern cars" |
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 10/11/2006(UTC)
Posts: 543
Was thanked: 1 time(s) in 1 post(s)
|
did you change the gears as a set? their are imperial and metric gear sets? how much backlash did you have?
|
|
|
|
|
|
Rank: Veteran
Groups: Moderator, Registered, Veteran
Joined: 1/03/2005(UTC)
Posts: 14,897
Thanks: 1 times
Was thanked: 555 time(s) in 530 post(s)
|
Solid or hydraulic cam and lifters? Right lifters for the cam?
Check that the dizzy is greased where the points run? Also mismatch between cam gears and oil pum or dizzy gears?
_______________________________________________________
If we all had |
_______________________________________________________
If we all had the same (good) taste, who would buy all the Fords? |
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 25/05/2007(UTC)
Posts: 69
|
You could always turn the stereo up a bit louder, could solve the problem noise!
Dont eat the yellow snow |
Don't eat the yellow snow |
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 14/06/2007(UTC)
Posts: 582
|
Some good notes. Thanks!
Theyre a matched set. Lash is minimal. But the noise, while constant, is too much of a rattle to be that, its just not even enough. The noise is ALWAYS there, but not at the exact steady rate, as youd expect from two gears in m |
"Silly modern cars" |
|
|
|
|
|
Rank: Guest
Groups: Guests
Joined: 2/09/2015(UTC)
Posts: 43,977
Was thanked: 5 time(s) in 5 post(s)
|
I like 1837s input of pump and dizzy gears, worth thinking about in this type of situation, but I reckon your cam gear is bouncing off the timing cover. And if you do have to pull the timing cover and you havent drilled an adjacent hole on the oil feed ni
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 15/07/2006(UTC)
Posts: 313
|
Is the car a manual if so does the noise reduce when you push the clutch in.
Had this type of noise before and turns out the flywheel was loose.
MONARO!!WHERE!!NICE |
MONARO!!WHERE!!NICE |
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 14/06/2007(UTC)
Posts: 582
|
Yeah, its a manual, but its not the flywheel. Cheers. |
"Silly modern cars" |
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 10/11/2006(UTC)
Posts: 543
Was thanked: 1 time(s) in 1 post(s)
|
did you find your noise????
|
|
|
|
|
|
Rank: Member
Groups: Registered
Joined: 14/06/2007(UTC)
Posts: 582
|
Not as of yet. Im thinking its off the cams accessory drive gear, not the main gear. I pulled the dizzy to check its drive gear, refitted it and the noise was gone, momentarily (a few minutes of idling and timing adjustments). Now its back as loud as ever |
"Silly modern cars" |
|
|
|
|
|
Forum Jump
You cannot post new topics in this forum.
You cannot reply to topics in this forum.
You cannot delete your posts in this forum.
You cannot edit your posts in this forum.
You cannot create polls in this forum.
You cannot vote in polls in this forum.
