|
Sponsored Links (Register now to hide all advertisements) |
|
|
Thread Tools | Display Modes |
06-19-2023, 08:16 PM | #1 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
y block ticking
272 started making what i thought was a manifold leek, so i poured tranny oil down the carb and the smoke exposed the leek at exhaust manifold wich is now fixed .
noise still there i can rev engine 3500 rpm in neutral , NO NOISE then soon as i let clutch out and put motor under load noise appears and is obvious when acccellerating |
06-19-2023, 10:01 PM | #2 |
Senior Member
Join Date: Oct 2011
Location: elmira,ny
Posts: 1,519
|
Re: y block ticking
spark knock? timing?
|
Sponsored Links (Register now to hide all advertisements) |
|
06-19-2023, 10:17 PM | #3 |
Senior Member
Join Date: May 2010
Location: Granite City, Illinois
Posts: 3,008
|
Re: y block ticking
It's probably not the engine. I would suspect one of the u-joints or transmission. Do you have the bottom flywheel cover installed on the bellhousing? It's not a good idea to drive without that because a rock can fly up in there and get kicked around by the flywheel.
|
06-20-2023, 06:59 AM | #4 |
Member
Join Date: Feb 2014
Location: St Paul MN
Posts: 36
|
Re: y block ticking
How are the motor mounts? If under load and the motor rocks, it can open up an exhaust leak that is not there when not under load.
|
06-20-2023, 10:55 AM | #5 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
it was at 12* i pulled it back to 6* still ticking
|
06-20-2023, 10:58 AM | #6 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
Sponsored Links (Register now to hide all advertisements)
u joints seem ok next is motor mounts ... |
06-20-2023, 06:16 PM | #7 |
Senior Member
Join Date: May 2010
Location: Huntsville Al
Posts: 1,526
|
Re: y block ticking
I once had a tick on my 56 292 that finally turned out to be one of the rocker arm shaft mounting bolts loosened up allowing too much clearance on the rocker arm assembly. Listen at the valve cover to see if that can be eliminated.
__________________
Matt 24:36-41 |
06-20-2023, 08:28 PM | #8 |
Senior Member
Join Date: May 2010
Location: Granite City, Illinois
Posts: 3,008
|
Re: y block ticking
I would think you would hear it at idle speed also if either a loose rocker shaft mounting bolt or a woefully loose adjusted rocker arm. He said it makes no noise at idle.
|
06-20-2023, 09:30 PM | #9 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
yes and i even blocked the wheels with emergency brake on and loaded the motor " no ticking" only while driving
|
06-21-2023, 09:08 AM | #10 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
i'll check rocker shafts
|
06-21-2023, 03:11 PM | #11 |
Senior Member
Join Date: May 2010
Location: St. Michael, Minnesota
Posts: 1,713
|
Re: y block ticking
Only when driving takes the noise to behind the flywheel. Those U joints may seem OK, but I would bet the price of a U joint that one is bad.
|
06-21-2023, 04:01 PM | #12 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
ok ill yank the drive shaft
stay tunned |
06-21-2023, 10:40 PM | #13 |
Senior Member
Join Date: May 2010
Location: Granite City, Illinois
Posts: 3,008
|
Re: y block ticking
Tell ya what. Leave that flywheel bottom cover off and drive down a few dusty roads. That flywheel acts as a fan blowing dust right at the starter drive. It'll be no time and your starter drive will be stuck in the disengaged position.
|
06-22-2023, 06:48 AM | #14 |
Senior Member
Join Date: Apr 2019
Location: Kansas
Posts: 947
|
Re: y block ticking
Put car on jackstands under the rear axle. Run it in gear, accelerate while applying brakes to load the engine. Have a helper listen under hood (or elsewhere) to locate the noise.
Terry
__________________
"It don't take but country smarts to solve the problem" (Smokey Yunick) '41 Merc Town Sedan / 260" 8CM engine '66 Fairlane four door / "warmed up" 302 |
06-22-2023, 08:32 AM | #15 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
I’ll put cover on when I’m sure rear main is not leaking on my refreshed 272
Off to check u joints |
06-22-2023, 11:56 AM | #16 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
drive shaft is off
everything is free ,smooth and no slop so i greased it now reinstalling so now its to run car on jack stands or check rocker shaft and make sure its tight to the head ... |
06-22-2023, 04:33 PM | #17 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
drive shaft is ok
rocker shaft and valve lash is ok i'll have to get help to run it on stands |
06-22-2023, 06:40 PM | #18 |
Senior Member
Join Date: May 2010
Location: Palmer, Alaska
Posts: 1,575
|
Re: y block ticking
Are you sure it is not "pinging", caused by poor fuel octane, or incorrect ignition timing? This only happens under the conditions you described.
|
06-22-2023, 08:56 PM | #19 |
Senior Member
Join Date: Jul 2018
Location: Ottawa, Ont Canada
Posts: 161
|
Re: y block ticking
sounds like a manifold leak , i'll go at it again tommorow
i'm at 6* maybe pull a bit more timing out i only use premium pump and i've put a few tanks recently |
06-22-2023, 10:18 PM | #20 |
Senior Member
Join Date: Oct 2011
Location: elmira,ny
Posts: 1,519
|
Re: y block ticking
have a manual choke? if not set choke part way closed and retry. If you don't hear the noise it's running lean.
|
|
|
Sponsored Links (Register now to hide all advertisements) |
|