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 12-09-2014, 08:36 PM   #1
lesbliss
Member
 
Join Date: May 2010
Location: Henderson,NV
Posts: 56
Default No compression

I've had a srange thing happen to my stock 51 Mercury with merc-o-matic. It has been driven very litle for the last 8 months. Took it out of storage and drove about 30 miles on the freeway. Ran ok but stalled in traffic when starting from a stop. Worked on reposistioning the the electric fuel pump to tuck it up further in frame. Noticed a slight tick from the valves so put 8oz of marvel mystery oil and drove around
or a while.
Six hours later went to start her up and no start. Turned out I had zero compression in all cylinders. Pulled the heads and found three stuck valves. I haved pulled the valves and they are not pitted or burnt.

My questions is has any one ever had compresion all all cylinders fail so suddenly like that and what is likely cause?

Les Bliss
lesbliss is offline   Reply With Quote
Old 12-09-2014, 08:40 PM   #2
38 Ford Guy
Senior Member
 
38 Ford Guy's Avatar
 
Join Date: Jul 2010
Location: Central MN
Posts: 104
Default Re: No compression

Are your valves stuck open? rust on the guides will do that had it happen once.
__________________
"If you always do what you have always done then you will always get what you always got."
Henry Ford
38 Ford Guy is offline   Reply With Quote
Sponsored Links (Register now to hide all advertisements)
Old 12-09-2014, 09:22 PM   #3
RalphG
Senior Member
 
RalphG's Avatar
 
Join Date: Sep 2014
Location: Sask. Canada
Posts: 2,027
Default Re: No compression

No, mine have stuck valves from years of inactivity. Maybe something in the gas? Old gas in the tank?
RalphG is offline   Reply With Quote
Old 12-09-2014, 09:33 PM   #4
richard crow
Senior Member
 
Join Date: May 2010
Posts: 1,505
Default Re: No compression

if you have no comp in all cylinders your timing gear is at fault
richard crow is offline   Reply With Quote
Old 12-09-2014, 09:51 PM   #5
4tford
Senior Member
 
4tford's Avatar
 
Join Date: May 2010
Location: Regina Canada
Posts: 1,318
Default Re: No compression

could be valves, I took one apart a month ago and all valves were stuck open.
4tford is offline   Reply With Quote
Old 12-09-2014, 09:51 PM   #6
mtflat
Senior Member
 
mtflat's Avatar
 
Join Date: May 2010
Location: Kalispell Montana
Posts: 340
Default Re: No compression

Sponsored Links (Register now to hide all advertisements)
timing gear was my first thot... especially if you have a stock fiber gear. I had one blow up going down the road.
mtflat is offline   Reply With Quote
Old 12-09-2014, 10:01 PM   #7
lesbliss
Member
 
Join Date: May 2010
Location: Henderson,NV
Posts: 56
Default Re: No compression

I thought timing gear at first too, but distributor turns. Valves were stuck open.

Les
lesbliss is offline   Reply With Quote
Old 12-09-2014, 10:01 PM   #8
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 12,175
Default Re: No compression

I would not consider loss of compression on all 8 cylinders a common thing. Sticking valves will only cause the cylinders affected to have no compression. Did you put the MMO in the fuel or in the oil? You can use it in either but it would act better as a top end lube if it were in the fuel. This is a normal treatment for sticky valve problems. Your rings may be gummed up or the fuel has gone bad. E10 fuel is causing all sorts of headaches now days. Putting ethanol in the fuel causes all sorts of problems if the vehicle is stored in an area that is susceptible to condensation. If too much H2O gets in the tank, it mixes with the alcohol until it's fully absorbed then it all goes to the bottom of the tank in a sticky mass. Too much of this collects in the tank and it will eventually be drawn into the fuel system. If you still have a fuel pump with a sediment bowl, you may see signs of the crap in there.

You might verify that the distributor rotor bug is still lined up with the #1 tower with # 1 cylinder on TDC of the firing stroke.
rotorwrench is offline   Reply With Quote
Old 12-09-2014, 10:32 PM   #9
WestCoast
Senior Member
 
Join Date: Sep 2014
Location: oroville calif
Posts: 893
Default Re: No compression

Richard may very well right, remove dist cap and turn engine over, if rotor dosnt turn good indicator the cam gear is stripped
WestCoast is offline   Reply With Quote
Old 12-10-2014, 07:05 AM   #10
JWL
Senior Member
 
Join Date: May 2010
Location: Fitzgerald, Georgia
Posts: 2,050
Default Re: No compression

Either a broken camshaft or all valves stuck open.
JWL is offline   Reply With Quote
Old 12-10-2014, 08:26 AM   #11
Cecil/WV
Senior Member
 
Cecil/WV's Avatar
 
Join Date: May 2010
Location: Gerrardstown, WV
Posts: 2,211
Default Re: No compression

I put five gallon of stale gas in my 8N tractor a few years ago and it stuck all the valves and I had to remove each one and clean in solvent. They were covered with a gooey gunk.
Cecil/WV is offline   Reply With Quote
Old 12-10-2014, 09:42 AM   #12
lesbliss
Member
 
Join Date: May 2010
Location: Henderson,NV
Posts: 56
Thumbs up Re: No compression

Thanks for the replies. I thought it was vavle related but I didn't want to overhaul the valves and still have the problem. The post about bad gas makes sense. I plan on grinding valves and deglazing cylinders and new rings and bearings. Car only has 68,000 miles. Living in Las Vegas I hope I can get it going before the hot weather hits. No air conditioning.

Les
lesbliss is offline   Reply With Quote
Old 12-12-2014, 01:26 PM   #13
Karl Wolf
Senior Member
 
Karl Wolf's Avatar
 
Join Date: May 2010
Location: Mill Valley,Ca.
Posts: 1,406
Default Re: No compression

Quote:
Originally Posted by lesbliss View Post
I've had a srange thing happen to my stock 51 Mercury with merc-o-matic. It has been driven very litle for the last 8 months. Took it out of storage and drove about 30 miles on the freeway. Ran ok but stalled in traffic when starting from a stop. Worked on reposistioning the the electric fuel pump to tuck it up further in frame. Noticed a slight tick from the valves so put 8oz of marvel mystery oil and drove around
or a while.
Six hours later went to start her up and no start. Turned out I had zero compression in all cylinders. Pulled the heads and found three stuck valves. I haved pulled the valves and they are not pitted or burnt.

My questions is has any one ever had compresion all all cylinders fail so suddenly like that and what is likely cause?

Les Bliss
I heard of the possibility of bending all the exhaust valves by using a compression tester that threaded too far into the cylinder... Right over exhaust valves...

Karl
Karl Wolf is offline   Reply With Quote
Old 12-12-2014, 05:50 PM   #14
FlatheadTed
Senior Member
 
FlatheadTed's Avatar
 
Join Date: May 2010
Location: Auckland
Posts: 4,313
Send a message via AIM to FlatheadTed
Default Re: No compression

If 8 months ago it was a good running car I wouldn't be doing rings and bearings .look for the cause see if there's a sticky goo on the valve .Even if you had a fibre gear stripped it will have compression on the ones that are closed .change the oil ,could be diluted .Ted
Quote:
Originally Posted by lesbliss View Post
Thanks for the replies. I thought it was vavle related but I didn't want to overhaul the valves and still have the problem. The post about bad gas makes sense. I plan on grinding valves and deglazing cylinders and new rings and bearings. Car only has 68,000 miles. Living in Las Vegas I hope I can get it going before the hot weather hits. No air conditioning.

Les
__________________
http://www.flatheadted.com

Last edited by FlatheadTed; 12-13-2014 at 12:36 PM.
FlatheadTed is offline   Reply With Quote
Old 12-12-2014, 08:18 PM   #15
Binx
Senior Member
 
Join Date: Oct 2011
Location: Gloucester VA
Posts: 1,042
Default Re: No compression

Quote:
Originally Posted by Karl Wolf View Post
I heard of the possibility of bending all the exhaust valves by using a compression tester that threaded too far into the cylinder... Right over exhaust valves...

Karl

Good call Karl. An "Occam's razor" for sure. As I remember the story, the person did it again after replacing the valves.

Lonnie
Binx is offline   Reply With Quote
Old 12-13-2014, 09:38 AM   #16
rotorwrench
Senior Member
 
rotorwrench's Avatar
 
Join Date: Jun 2010
Location: San Antonio, Texas
Posts: 12,175
Default Re: No compression

I imagine that would have made a hell of a racket beating all those valves to death.
rotorwrench 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 06:41 AM.