Go Back   The Ford Barn > General Discussion > Early V8 (1932-53)

Sponsored Links (Register now to hide all advertisements)

Reply
 
Thread Tools Display Modes
Old 04-09-2021, 07:42 PM   #1
OldCoach
Junior Member
 
Join Date: Mar 2021
Posts: 2
Default bad Babbitt Bearing or Valve Poor Quality Valve Job

I have a 1950 Ford Custom sedan with 239cu in flathead V8. For over two years I've been hearing a rattle sound from the engine. One mechanic tells me it's bad Babbitt bearing(s). Another mechanic says the rattle is due to a poor valve job sometime in the past. The car runs very well; no oil leak or loss of power. The rattle is not overly loud but noticeable. Wouldn't the car have "blown up" by now if I had bad Babbitt bearing(s)?
OldCoach is offline   Reply With Quote
Old 04-09-2021, 08:41 PM   #2
petehoovie
Senior Member
 
petehoovie's Avatar
 
Join Date: May 2015
Posts: 3,329
Default Re: bad Babbitt Bearing or Valve Poor Quality Valve Job

No 'Babbitt' bearings in that engine of yours. Ford discontinued Babbitt bearings back in 1936. It could be that you are hearing piston slap....
__________________
The only thing nice about being imperfect is the joy it brings to others....

"Silver rings, your butt! Them's washers!"
"We shot our way out of that town for a dollar's worth of steel holes." - from 'The Wild Bunch' - 1969

https://www.youtube.com/watch?v=7NReUd2_0u0
petehoovie is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 04-09-2021, 08:58 PM   #3
tubman
Senior Member
 
tubman's Avatar
 
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 7,418
Default Re: bad Babbitt Bearing or Valve Poor Quality Valve Job

The first thing you need is a new mechanic.
tubman is offline   Reply With Quote
Old 04-09-2021, 10:18 PM   #4
fordwife
Senior Member
 
Join Date: Dec 2015
Posts: 251
Default Re: bad Babbitt Bearing or Valve Poor Quality Valve Job

Obviously, neither mechanic knows much about early ford v8s.
fordwife is offline   Reply With Quote
Old 04-10-2021, 09:02 AM   #5
Rodrelic
Member
 
Join Date: Mar 2018
Location: South of Williamsport pa
Posts: 65
Default Re: bad Babbitt Bearing or Valve Poor Quality Valve Job

If the oil pressure is good, I would pull the intake and start checking valve gap, easiest thing to check. If wide, will have to pull heads and grind valves, &/or install adjustable. If pulling the valves to change lifters, may as well touch up or just lap them too.
I had a rattley 8RT that ran good, and disassembly showed a depression in the lifter where the stem rode, some quite deep. Could not gauge divot, but about .020. Don’t know why, but replaced with adjustables and lapped valves, run quiet
Rodrelic is offline   Reply With Quote
Old 04-10-2021, 03:20 PM   #6
OldCoach
Junior Member
 
Join Date: Mar 2021
Posts: 2
Default Re: bad Babbitt Bearing or Valve Poor Quality Valve Job

Sponsored Links (Register now to hide all advertisements)
Oil pressure is good. What you're saying sounds much better than having engine pulled, disassembled and being sent off for machining.
OldCoach is offline   Reply With Quote
Old 04-10-2021, 03:35 PM   #7
tubman
Senior Member
 
tubman's Avatar
 
Join Date: Dec 2013
Location: Minnesota, Florida Keys
Posts: 7,418
Default Re: bad Babbitt Bearing or Valve Poor Quality Valve Job

That sounds much better. Do you have some more specific readings? Cold/hot idle and cold/hot at speed?

As an example of what can happen, my '51 had good oil pressure but an intermittent rattle when revved up with the clutch in. I finally got tired of it and pulled the engine to install a Merc I had built. To do the swap, I had to switch oil pans (put the Ford pan on the Merc.) When I was cleaning out the Ford pan, I found an inch long piece of the main bearing thurst surface in the bottom of the pan.
tubman is offline   Reply With Quote
Old 04-10-2021, 03:48 PM   #8
Lawrie
Senior Member
 
Lawrie's Avatar
 
Join Date: May 2010
Location: Qld, Australia
Posts: 3,753
Default Re: bad Babbitt Bearing or Valve Poor Quality Valve Job

Dont take good oil pressure as no bearing problem. my 99a eng ran 50 hot and 25 hot idle for years ,yet still had a pair of rod bearings that had failed and a rear main , only a slight noise from the engine.
Lawrie
Lawrie is offline   Reply With Quote
Reply

Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump

Sponsored Links (Register now to hide all advertisements)


All times are GMT -5. The time now is 11:51 AM.