No compresion after sitting for 2 years - Hot Rod Forum : Hotrodders Bulletin Board
Hotrodders.com -- Hot Rod Forum



Register FAQ Search Today's Posts Unanswered Posts Auto Escrow Insurance Auto Loans
Hot Rod Forum : Hotrodders Bulletin Board > Tech Help> Engine
User Name
Password
lost password?   |   register now

Reply
 
LinkBack Thread Tools
  #1 (permalink)  
Old 06-15-2009, 08:53 PM
Registered User
 
Join Date: Feb 2004
Location: Lakewood, CA
Age: 61
Posts: 23
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
No compresion after sitting for 2 years

I pulled the 327 out of my '67 chevy wagon about 2 years ago. It ran OK when I pulled it out, but I wanted to put in a built 350 that I had. Do to the economy and kids in college, it's time to sell the beast. Before throwing the old 327 back in, I rolled it over and installed a new oil pan gasket (the old one had about an inch missing by the fuel pump from before I owned it). It was upside down on the engine stand for 3 days. Now that it's in the car, I can not get it to start. The timing was never changed and the carb is still able to pump in fuel. So I did a comprission check, and found 0 in the 4 cyclinders I checked. Could the oil have drained out of the lifters so the valves are not opening? If so, is there an easy way to pump them back up? I hate to sell it with a non running engine. Any help will be appriciated.

    Advertisement
Reply With Quote Quick reply to this message
Sponsored Links
Advertisement
 
  #2 (permalink)  
Old 06-15-2009, 09:19 PM
Member
 
Last wiki edit: Ford axle ratio codes
Last journal entry: Rear Suspension
Last photo:
Join Date: Aug 2005
Location: Prattsville
Posts: 6,389
Wiki Edits: 31

Thanks: 2
Thanked 58 Times in 54 Posts
prime the oil pump, then try it again... but really 0 on 4 cylinders sounds more like a broken tester
Reply With Quote Quick reply to this message
  #3 (permalink)  
Old 06-15-2009, 09:29 PM
Registered User
 
Join Date: Feb 2004
Location: Lakewood, CA
Age: 61
Posts: 23
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
I have a mechanical gage I am going to hook up in place of the sending unit. A friend loaned me a shaft to drive the pump. That will be my project for tomorrow. And I guess I will be buying a new gage. Thanks
Reply With Quote Quick reply to this message
  #4 (permalink)  
Old 06-15-2009, 09:36 PM
fast68's Avatar
likes chevy trucks & boobies
 
Last photo:
Join Date: Oct 2005
Location: IL
Posts: 1,970
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
cna you feel air sucking in or pushing out of spark plug holes when you turn the engine over by hand ??

you should do that simple basic check then to see if there is any compression at all and tell you if your tester is good or junk

an engine sitting over many years is no reason for it to lose compression

i have fired up a billion engines that sat dry untouched for over a decade or two, and never once had an issue like this.

so its no excuse IMHO

change the oil put a new filter on and new gas maybe new plugs and a good carb put gas down the carb and fire it up

i never prime the oil system either.

theyve always fired up and run just fine, if they ran when last shut off

unless timing or order is wrong or carb is locked up


most of the time they smoke kinda bad or pretyt bad for a while initially but that goes away after a little while running


if it was known good running last it ran and you didnt mess with firing order or timing etc and it has a good carb on it for sure then you shoulkd be able to pour some gas down the carb throttle and fire it right up



only 2 years ago is no excuse

it should fire right up

the lifters will pump right up when it fires up if the oil pump works

no worries there.,



good luck

Last edited by fast68; 06-15-2009 at 09:42 PM.
Reply With Quote Quick reply to this message
  #5 (permalink)  
Old 06-15-2009, 10:33 PM
curtis73's Avatar
Hates: Liver. Loves: Diesel
 
Last wiki edit: How to find cheap parts
Last journal entry: 1999-2001: Getting it on the road
Last photo:
Join Date: Dec 2005
Location: Carlisle, PA
Age: 41
Posts: 5,156
Wiki Edits: 16

Thanks: 2
Thanked 9 Times in 6 Posts
If the hole in the pan happened two years ago, it could be a real problem. Humidity has had free access to the cylinders for two years. My guess is that a few cylinders (the ones stored with their pistons up) let rust run rampant in there and destroyed ring seal the first time it was cranked.

The other possibility is that you didn't lube the cam lobes before you turned it and they wiped flat... but that typically takes a while. You should get SOME compression in those cylinders even if they're almost completely flat.

Even a completely dry lifter will open the valves. The lifter's piston travel is far less than the lobe lift of the cam. Even if you removed the spring from the lifter, the piston travel would be taken up in less than 10% of the lobe lift. Its not possible for even a completely collapsed lifter to offer no lift.
Reply With Quote Quick reply to this message
  #6 (permalink)  
Old 06-16-2009, 03:08 AM
DoubleVision's Avatar
Not Considered a Senior Member
 
Last photo:
Join Date: Oct 2002
Location: Heart Of Dixie
Age: 40
Posts: 10,658
Wiki Edits: 0

Thanks: 15
Thanked 60 Times in 57 Posts
If you get the engine to start make sure you cycle it as you would a new engine, if not your asking for the cam to be wiped out. In many cases over the years when engines sat and were later restarted and weren`t cycled it wiped the cam out in a short time, especially in small block Chevy`s.
There`s also the possibility you may have some stuck rings, you may want to pour some marvel mystery oil in each cylinder and let it soak overnight.
Reply With Quote Quick reply to this message
  #7 (permalink)  
Old 06-16-2009, 05:18 AM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
engine

The very first thing to do is, put that tester in a engine that runs and make sure the compression gage is working.

Is it possible that you backed all the rockers off when you stored the engine??? And forgot that you did it??

I have been around some busted up engines and i can't say that i have ever seen zero compression in one cylinder let alone 4.

Priming the oil system is a good idea but thats not the problem, even if all the lifters are out of oil ( and i doubt they are) they will still open the valves enough to start the engine/have compression.


Keith
Reply With Quote Quick reply to this message
  #8 (permalink)  
Old 06-16-2009, 05:54 AM
cobalt327's Avatar
WFO
 
Last wiki edit: Intake manifold
Last journal entry: 1980 Malibu Wagon
Last photo:
Join Date: Mar 2009
Location: Atlanta
Age: 59
Posts: 5,037
Wiki Edits: 1616

Thanks: 128
Thanked 597 Times in 546 Posts
Quote:
Originally Posted by maddogmodl
I did a comprission check, and found 0 in the 4 cyclinders I checked.
A piston and cylinder on its last legs will pump something- even w/o rings you should get 10-20 psi.

So I'm agreeing w/it being a bad gage.

Like DV said- MM oil will loosen those rings up, should they be varnished/gummed up some, plus will provide some top-end lubrication for the initial start-up, before the oil gets circulating and the engine is running fast enough to "splash lube" the cylinder walls.

MM oil can also help if there's some surface rust on the cylinder walls. "Sanding" it off w/the dry rings isn't a good thing. The gasket missing for a couple inches on the pan rail might not have been the best thing, but IMO, unless there was water getting right on it (rain, etc.) there might not be too much internal rust. At least for your sake I hope not!

Changing the oil and filter and priming the engine before starting is always a good idea, but I too, have started engines up after years of inactivity w/o priming them and have (so far) gotten away w/it.

Usually, what will happen (if anything) when starting up an engine that has sat, is the valve stem seals will have dried up and become brittle- so they will fall off shortly after restarting the engine. Later on, you may notice the timing chain cover seal and the rear main seal seeping some (more) oil. The mechanical fuel pump diaphragm can become brittle and stiff and can fail, along w/any other rubber seals/diaphragms (carb, etc.).

A tune-up, fresh fuel and replacing maintenance items like the PCV valve, fuel and air filters are a given.
Reply With Quote Quick reply to this message
  #9 (permalink)  
Old 06-17-2009, 09:37 AM
Registered User
 
Join Date: Feb 2004
Location: Lakewood, CA
Age: 61
Posts: 23
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Thanks guys for all of your info. The shop I went to for a new compression gauge had me talk to there machine shop (this is a true old parts house with a shop for rebuilding anything). The old guy that only rebuilds heads told me it's a rare one, but pull the valve covers and check the push rods. He was right! After pulling them I found 14 were bent. A good tap with a brass hammer on each valve (2 were a bit more like a smack) and the valves are loose. I installed new pushrods a what a surprise, the old compression gauge shows 80-85 lbs on all cylinders. The engine fired up and sounds great. I do have a leak in the side of the carb though. A rebuild of that and she should be a great find for someone wanting an old long roofed rod.
Thanks again
Bob
Reply With Quote Quick reply to this message
  #10 (permalink)  
Old 06-17-2009, 09:42 AM
Registered User
 
Last photo:
Join Date: Nov 2008
Location: in the garage
Posts: 240
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
Nothing like a good wackin'
Reply With Quote Quick reply to this message
  #11 (permalink)  
Old 06-17-2009, 09:59 AM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
engine

Quote:
Originally Posted by maddogmodl
Thanks guys for all of your info. The shop I went to for a new compression gauge had me talk to there machine shop (this is a true old parts house with a shop for rebuilding anything). The old guy that only rebuilds heads told me it's a rare one, but pull the valve covers and check the push rods. He was right! After pulling them I found 14 were bent. A good tap with a brass hammer on each valve (2 were a bit more like a smack) and the valves are loose. I installed new pushrods a what a surprise, the old compression gauge shows 80-85 lbs on all cylinders. The engine fired up and sounds great. I do have a leak in the side of the carb though. A rebuild of that and she should be a great find for someone wanting an old long roofed rod.
Thanks again
Bob
Help me understand this, stuck valves caused bent push rods???

Keith
Reply With Quote Quick reply to this message
  #12 (permalink)  
Old 06-17-2009, 10:43 AM
bobjob's Avatar
Registered User
 
Last photo:
Join Date: Apr 2009
Location: florence az.
Age: 60
Posts: 295
Wiki Edits: 0

Thanks: 0
Thanked 0 Times in 0 Posts
try squirting a little penetrating oil in thru spark plug holes.. turn over and check again.. rings stuck..
Reply With Quote Quick reply to this message
  #13 (permalink)  
Old 06-17-2009, 06:11 PM
T-bucket23's Avatar
Hotrodders.com Moderator
 
Last wiki edit: Engine basic condition - how to check Last photo:
Join Date: Aug 2005
Location: Massachusetts
Age: 57
Posts: 5,247
Wiki Edits: 26

Thanks: 7
Thanked 121 Times in 106 Posts
Quote:
Originally Posted by k-star
Help me understand this, stuck valves caused bent push rods???

Keith
14 of them no less.
__________________
Artificial Intelligence is no match for Natural Stupidity



Chet
Reply With Quote Quick reply to this message
  #14 (permalink)  
Old 06-18-2009, 09:33 AM
Registered User
 
Last wiki edit: Wheelbase database Last photo:
Join Date: Jan 2007
Location: Virginia
Posts: 3,569
Wiki Edits: 1

Thanks: 6
Thanked 156 Times in 143 Posts
Quote:
Originally Posted by k-star
Help me understand this, stuck valves caused bent push rods???

Keith
What's not to understand? If the valve is stuck and the lifter pushes up on the pushrod, SOMETHING is going to bend or break.
Reply With Quote Quick reply to this message
  #15 (permalink)  
Old 06-18-2009, 09:38 AM
Hotrodders.com Moderator
 

Last journal entry: PICTURE TEST
Last photo:
Join Date: Jan 2004
Location: york pa
Age: 52
Posts: 2,795
Wiki Edits: 0

Thanks: 0
Thanked 1 Time in 1 Post
engine

Quote:
Originally Posted by joe_padavano
What's not to understand? If the valve is stuck and the lifter pushes up on the pushrod, SOMETHING is going to bend or break.

Glad you pointed that out...now it's clear to me..

Keith
Reply With Quote Quick reply to this message

Recent Engine posts with photos

Quick Reply
Message:
Options

Register Now

In order to be able to post messages on the Hot Rod Forum : Hotrodders Bulletin Board forums, you must first register.
Please enter your desired user name (usually not your first and last name), your email address and other required details in the form below.
User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.
Password:
Confirm Password:
Email Address
Please enter a valid email address for yourself.
Email Address:

Log-in

Human Verification

In order to verify that you are a human and not a spam bot, please enter the answer into the following box below based on the instructions contained in the graphic.




Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools

Posting Rules
You may post new threads
You may 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
Trackbacks are On
Pingbacks are On
Refbacks are On


Similar Threads
Thread Thread Starter Forum Replies Last Post
Sherman Williams Clear Coat Failing < 3 Years? DeJarnett Body - Exterior 33 12-11-2005 10:39 AM
Trying to revive an old flat head that's been sitting Rusty72Capri Engine 5 09-15-2004 06:05 PM
give me tips for restarting an engine thats been sitting... QuikSSilver Engine 5 12-05-2002 09:22 PM
302 Intakes. What years? bildo95 Engine 1 08-25-2002 11:48 PM
rearend for a 29, been sitting for awhile, still good? pikalpha Transmission - Rearend 1 11-16-2001 03:08 AM


All times are GMT -6. The time now is 11:55 PM.


Powered by vBulletin® Version 3.8.7
Copyright ©2000 - 2014, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0 PL2
Copyright Hotrodders.com 1999 - 2012. All Rights Reserved.