Like Christmas Bells.
Ring orientation
Thread Starter
|
Laughing Gas
Joined: Mar 2013
Posts: 1,027
Likes: 5
From: Garner NC
Ring orientation
Dot up, chamfer up, but what if the dot is on one side and the chamfer is on the other? If I go by the order of the instructions it mentions dot first (stamped dot, which I have), and chamfer in the second paragraph. Hastings set.
Hotshot
Joined: Mar 2013
Posts: 14,255
Likes: 199
From: Phoenix, Az.
"At Hastings Manufacturing we want using our product to be as easy as possible, starting with the second you open the box.
The top compression rings we make have an inside bevel, and we’re often asked which way the bevel goes. Quite simply, the ID bevel is installed toward the top of the piston in any groove it’s intended for. Top compression rings with no marking can be installed either way".
The top compression rings we make have an inside bevel, and we’re often asked which way the bevel goes. Quite simply, the ID bevel is installed toward the top of the piston in any groove it’s intended for. Top compression rings with no marking can be installed either way".
Thread Starter
|
Laughing Gas
Joined: Mar 2013
Posts: 1,027
Likes: 5
From: Garner NC
OK, so what about the dot? My top rings have the dot and bevel on the same side. It's the second ring that has them opposite.
Edit:
Close inspection of the instructions (ring wrapper) shows the dot on the opposite side as the chamfer (first picture) and says "dot up". "If no dot, refer to picture on right" which shows alternate cross sections. So the chamfer will be up on the top ring, and down on the second ring.
Edit:
Close inspection of the instructions (ring wrapper) shows the dot on the opposite side as the chamfer (first picture) and says "dot up". "If no dot, refer to picture on right" which shows alternate cross sections. So the chamfer will be up on the top ring, and down on the second ring.
Tuned
Joined: Oct 2014
Posts: 406
Likes: 2
From: Tucson Arizona
The chamfer is to allow the compression gasses to help push the ring outwards and increase the sealing force between the ring and the cylinder face.
Top ring bevel goes towards the top of the piston.
The second ring usually does not have a chamfer.
From the days of building aircraft engines...
I usually position the top ring gap towards the intake valve and the second ring 180°. The oil rings I position 180° apart.
Rings rotate around the piston from the time that you start the engine.
So if you open an engine and the rings aren't where they were when it was built this is why.
Measure your ring end-gap. There should be about 0.010" of gap for every 1" of bore. So for a 390 the end-gap should be about 0.040". Too small of an end-gap will put excessive pressure on the ring when it gets hot causing increased wear of the ring and bore. Too much end-gap allows too much combustion pressure to blow past the rings.
But there are differing opinions on the proper way to do everything.
This is just the way that I learned and have done for more than 40 years.
Top ring bevel goes towards the top of the piston.
The second ring usually does not have a chamfer.
From the days of building aircraft engines...
I usually position the top ring gap towards the intake valve and the second ring 180°. The oil rings I position 180° apart.
Rings rotate around the piston from the time that you start the engine.
So if you open an engine and the rings aren't where they were when it was built this is why.
Measure your ring end-gap. There should be about 0.010" of gap for every 1" of bore. So for a 390 the end-gap should be about 0.040". Too small of an end-gap will put excessive pressure on the ring when it gets hot causing increased wear of the ring and bore. Too much end-gap allows too much combustion pressure to blow past the rings.
But there are differing opinions on the proper way to do everything.
This is just the way that I learned and have done for more than 40 years.
Trending Topics
Tuned
Joined: Apr 2011
Posts: 298
Likes: 4
From: Highland CA
read this it might answer some of your questions hope this helps.
https://www.google.com/url?sa=i&rct=...50387853654755
https://www.google.com/url?sa=i&rct=...50387853654755
FTE Stories
Ford Trucks for Ford Truck Enthusiasts
10 Things Every Truck Owner NEEDS (2026 Edition)
Michael S. Palmer
Rezvani's Latest Post-Apocalyptic Monster Is a Ford F-150 Raptor Underneath
Verdad Gallardo
Top 10 Most Expensive Ford Trucks Ever Sold on Bring a Trailer
Joe Kucinski
2027 Ford Super Duty Buyer's Guide (Every Model, Engine, & Package)
Brett Foote
Top 10 Ford Truck Tragedies
Joe Kucinski
AEV FXL Super Duty - the Super Duty Raptor Ford Doesn't Make
Brett Foote
Lobo Vs Lobo: Proof the F-150 Lobo Should Be Even Lower!
Michael S. Palmer
Ford's 2001 Explorer Sportsman Concept Looks For a New Home
Verdad Gallardo
10 Best Ford Truck Engines We Miss the Most!
Joe Kucinski
Thread
Thread Starter
Forum
Replies
Last Post
Argess
FE & FT Big Block V8 (332, 352, 360, 390, 406, 410, 427, 428)
11
Feb 7, 2009 08:58 PM
yellow72f100
Small Block V8 (221, 260, 289, 5.0/302, 5.8/351W)
3
Dec 16, 2006 07:35 PM