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Re: How to get rings to seat in a rebuilt engine?
Lugnutz #1367149 Tue Jun 30 2020 03:25 PM
Joined: Jun 2011
Posts: 3,544
E
Shop Shark
Those are used at every airport to check the valve and ring conditions of recip engines using 80 psi as the baseline.

Ed


'37 GMC T-18 w/ DD 4-53T, RTO-610, 6231 aux., '95 GMC running gear, full disc brakes, power steering, 22.5 wheels and tires.
'47 GMC 1 ton w/ 302, NP-540, 4wd, full width Blazer front axle.
'54 GMC 630 w/ 503 gasser, 5 speed, ex fire truck, shortened WB 4', install 8' bed.
Re: How to get rings to seat in a rebuilt engine?
Barnfind49 #1367166 Tue Jun 30 2020 05:18 PM
Joined: May 2015
Posts: 2,501
K
Housekeeping (Moderator) Making a Stovebolt Bed & Paint and Body Shop Forums
Originally Posted by Barnfind49
I highly doubt this thing was actually “rebuilt”. Unless rebuilt means yea we tossed a set of parts store rings and rod bearings in it so it all new now.
Otherwise know as a "repaint".


Kevin
First car '29 Ford Special Coupe
#2 - '29 Ford pickup restored from the ground up.
Newest Project - 51 Chevy 3100 work truck. Photos [flickr.com]
Busting rust since the mid-60's
Re: How to get rings to seat in a rebuilt engine?
Lugnutz #1367169 Tue Jun 30 2020 05:28 PM
Joined: Feb 2004
Posts: 20,612
H
Boltergeist
We used to call that a "Rattle Can Rebuild" back in the dark ages- - - - -low-budget used car lots would buy a junkyard engine, swap a few gaskets, and give it a quick paint job, and have some minimum wage wrench jockey drop it in and do a quick tune-up. Of course, the car was sold 'As Is- - - -No Warranty!"
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: How to get rings to seat in a rebuilt engine?
Lugnutz #1367251 Wed Jul 01 2020 01:41 AM
Joined: Sep 2011
Posts: 1,987
L
Lugnutz Offline OP
Shop Shark
Here’s a quick video of my leak down test. CYLINDER 5 VIDEO LINK [youtu.be]
I pressurized the cylinders again tonight and HEARD AND FELT air at the oil fill hole and the intake throttle body. If I also have leaking intake valves, then the cylinder leak down test numbers will be falsely lowered.
The plan for the weekend is to run the engine for a while and test it again when warm. I want accurate info before I ask the engine builder to remedy the problems.

Re: How to get rings to seat in a rebuilt engine?
Lugnutz #1367260 Wed Jul 01 2020 02:42 AM
Joined: Feb 2004
Posts: 20,612
H
Boltergeist
While you've got pressure on a cylinder, use a dead blow mallet to tap the top of the rocker arms to see if the valves can get a better seal. Sometimes just a couple of thumps can remedy a leak caused by a little debris between the valve and the seat. Worth a try!
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
Re: How to get rings to seat in a rebuilt engine?
Hotrod Lincoln #1367265 Wed Jul 01 2020 03:02 AM
Joined: Sep 2011
Posts: 1,987
L
Lugnutz Offline OP
Shop Shark
I have the covers back on and it’s ready for another test run Thursday.
I never felt air out the exhaust. I had some air coming back through the intake on at least six of the cylinders.
This engine wasn’t rebuilt properly and the valves seats were messed up too.
I’m gathering proof.

Last edited by Lugnutz; Wed Jul 01 2020 03:03 AM.
Re: How to get rings to seat in a rebuilt engine?
Lugnutz #1367456 Thu Jul 02 2020 02:51 PM
Joined: Dec 2001
Posts: 15,151
Boltergeist
jay, sounds like you may have a civil suit, ..........or a divorce, in the near future!!

keep us posted and good luck. you get an A+ on doing your homework, time for the dude to payup or suffer the consequences...unless he bellys up to the bar and does what is right!


1937 Chevy Pickup
1952 Chevy Panel
Pictures in my Photobucket
1950 Chevy Coupe

52 Chevy Panel

I'd rather walk and carry a Chevy hub cap than ride in a Ferd.
I can explain it to you, but I can't understand it for you smile
Re: How to get rings to seat in a rebuilt engine?
Lugnutz #1367462 Thu Jul 02 2020 03:12 PM
Joined: Feb 2004
Posts: 20,612
H
Boltergeist
One of my former students did a shade tree "valve job" by coating the valve faces with grinding compound and spinning the valve back and forth with a reversible cordless drill motor while pulling the valve against the seat. He got enough of a seal to get some compression on a worn out engine, filled the crankcase with STP and 90 weight gear lube, and sold the car! I wonder if he might have moved to your neighborhood?
Jerry


The murder victim was drowned in a bathtub full of Rice Krispies and milk.
The coroner blamed the crime on a cereal killer!

Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
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