Happy Easter and welcome to Packard Motor Car Information! If you're new here, please register for a free account.  
Login
Username:

Password:

Remember me



Lost Password?

Register now!
FAQ's
Main Menu
Recent Forum Topics
Who is Online
98 user(s) are online (66 user(s) are browsing Forums)

Members: 1
Guests: 97

acolds, more...
Helping out...
PackardInfo is a free resource for Packard Owners that is completely supported by user donations. If you can help out, that would be great!

Donate via PayPal
Video Content
Visit PackardInfo.com YouTube Playlist

Donate via PayPal



« 1 (2)

Re: 1940 120 flat 8 #2 low compression
#11
Home away from home
Home away from home

1940-120
See User information
Great automobile, good luck with it do you have pictures? Is it an original vehicle. I have one also and am looking for some pictures of original details. Will talk later. Welcome to the site
Fred D

Posted on: 2014/4/7 7:40
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#12
Forum Ambassador
Forum Ambassador

Owen_Dyneto
See User information
You've indicated that cylinder #2 has "low" compression at 88 psi compared to 92 and 93 for other cylinders. I don't consider that difference statistically significant much less low enough to cause immediate concern, especially for a car that's been in hibernation. Sure, adjust the valves and a valve grind may be in your future at some point. I don't have the spec. handy but it was probably about 115-120 psi at sea level for a fresh engine. Drive it a bit and retest again after a few hundred miles.

Posted on: 2014/4/7 8:31
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#13
Just popping in
Just popping in

40120sdncnv
See User information
OK. I will drive it. Seems strange that only number two is carboning. Must be borderline valve seal. I'll give an update later this spring. Thank you for your help. Any comment on oil filter cicuit?

Posted on: 2014/4/7 9:03
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#14
Forum Ambassador
Forum Ambassador

Owen_Dyneto
See User information
If you use the search function you should find MANY threads on the various oil filter routings for the in-line engines. IMO no reason to change it from the stock configuration, but change the filter cartridge with regularity.

Posted on: 2014/4/7 9:28
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#15
Forum Ambassador
Forum Ambassador

HH56
See User information
I'd have to look at the article again but wasn't the flow conversion and drilling a hole primarily for the Super 8 or 356 engine with hydraulic lifters? Those lifters not getting enough oil to stay pumped up were where the problems were.

The solid lifter engines need less oil flow -- enough for the bores to stay lubricated. Packard was still utilizing the inline filter plumbing postwar on several of those engines. If your engine has solid lifters, I wouldn't think you would experience any problems that required the conversion.

Posted on: 2014/4/7 9:29
Howard
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#16
Just popping in
Just popping in

40120sdncnv
See User information
Thank you Howard.

Posted on: 2014/4/7 9:34
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#17
Forum Ambassador
Forum Ambassador

Owen_Dyneto
See User information
The solid lifter engines need less oil flow

In fact the "120" style engines only got pressure feed to the lifters for 1938; 1935 thru 1937 they were quite satisfactorily just mist and splash lubricated.

Posted on: 2014/4/7 11:09
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#18
Home away from home
Home away from home

saltydog
See User information
Compressions not to bad on #2 maybe the plug is not firing. Greg

Posted on: 2014/4/9 16:09
 Top  Print 
 


Re: 1940 120 flat 8 #2 low compression
#19
Just popping in
Just popping in

40120sdncnv
See User information
I have spark at idle and swapped wires and plugs to see if I have interment issue at higher speed. No change. Verify distributor next. Must be valve or oil ring issue.

Posted on: 2014/4/10 3:45
 Top  Print 
 




« 1 (2)




Search
Recent Photos
Photo of the Day
Recent Registry
Website Comments or Questions?? Click Here Copyright 2006-2024, PackardInfo.com All Rights Reserved