Cylinder Head 105 - Valve Job Basics
Valves not sealing? Valves not bent? This is how you fix that problem.
In this video I outline the basic valve job procedure. Cleaning the
valves, cleaning the seats, cleaning the combustion chamber and lapping the
valves in to make a better seal.
Here I cover the process start-to-finish. It's the same exact process for
pretty much all non-rotary combustion engines. It takes patience and
perseverance to do this job, but anyone can do it. Reference your service
manual for measurements and service limits. Everything else that's not in
your service manual is in this video.
I apologize for not having broken busted crap to work with in this video.
It's more beneficial to all of you when bad fortune falls on me because it
gets well documented, and many people watching these videos are looking for
answers. If you have bent valves, you will discover it quickly once you
chuck one up in the drill. You'll see the face of the valve wobble around
while it spins. You'll see evidence of this damage on the valve seat. If
it's bad, you may see damage on the valve guides in the form of cracks or
missing pieces where the valve guides protrude through the head ports.
Give all that stuff a good visual inspection. ...and if you doubt yourself,
never hesitate to get a second opinion or consult a machine shop. They
will have access to expensive tools that you wont find in your average
Pro-1 Racing Heads Valve Guide
Learn the method we use to manufacture our very own valve guides. Our valve
guides are made from the best materials available and we manufacture them
in-house. Video courtesy of Pro-1 Racing Heads. Visit
www.pro1racingheads.com for more info.
SBC Valve Guide Installation
John @ Costa Mesa R&D Automotive Machine describes how to replace valve
guides on the popular small block Chevrolet cylinder head.
Subaru Head Gasket Preparation
Justin at All wheel Drive Auto, explains how to prepare a cylinder head on
a Subaru, when replacing head gaskets. He shows both the wrong way to do it
and the best way to do it.
Changing valve guides T120R #1
this job can be done, heating the head in the oven to around 150deg.
as my head was still oily and I did not want the house filling up with
smoke (again) I decided to boil it.
Honda Head Job, & Valve Seal Replacement
This is a video I did for a project. In this video you see us replacing
seals and it also covers other basics like valve spring compression and
lubing your cylinder head.
Here you can access the same online info that I use to work on my own cars:
Here at Northern Tools you can find Milwaukee Tools, and other tools I use
in my videos:
Click here to show thanks, and help support Fixbook:
Fixbook DIY Car Repair
Blueprint 108 - inspect the deck
There's a reason why there are no subtitled specifications in this video
for the block. It's because they don't exist in either service manual, 1g
or 2g. You're not supposed to remove material from a block on the deck
surface because it has ill effects on parts of the combustion chamber
geometry, and alters your compression ratio. It can be done intentionally
in some cases for a desired side-affect, but if you have to deck a 4g63
head, it would be advised to use a thicker head gasket. The Mitsubishi
Multi-Layered-Steel or MLS gasket is slightly thicker than the OEM
composite gasket. Also, HKS, Power Enterprise, Cometic, and other
performance brands all make MLS gaskets that are .065 and thicker.
THERE IS ONE ERROR IN THE VIDEO. I said a block with .002" warpage is
junk. I was completely and totally wrong. While I don't wish to spread
misinformation, I don't think it's a big enough error to warrant re-editing
this video. I just wasn't paying attention. .002" warpage on a cylinder
head is the service limit before it needs machining. I meant to say
.02"... or two HUNDREDTHS (not thousandths) of an inch.
...and here's my justification...
A warped block to me is junk either way even if its minimal because your
MLS gasket will never seal unless both the head and the block are perfectly
flat. Trust your machine shop to get the values for how much is taken off,
and buy the correct thickness gasket for your machine work.
A factory head gasket (composite) is .051"
The MLS Mitsubishi gasket is available in the stock .051 and a .062"
Cometic makes gaskets up to .072"
There are some brands that go as high as .127", but I'd have thrown both
the block and head away long before then.
324 Oldsmobile Cracked Cylinder Head Repair
This Oldsmobile 324 Rocket cylinder head has a crack, watch John Edwards as
he repairs is at Costa Mesa R&D Automotive Machine. (949) 631-6376 Be sure
to "Click" and SUBSCRIBE.
BBC Casting 241 cylinder heads Part 6 "Valve Guide Instalation"
Doing the valve guides correctly is the most important thing in the life of
the valve job. Tight clearances are KEY in the movement of the valves in
the guides. These valves from S.I. are to the BIG side so they have to be
"hand honed" to perfect clearances. The use of the Metal Clad Viton seals
help to keep just the right amount of oil on the valves. I am looking for
.0012 clearance on intake and .0015 on Exhaust and with taper NO MORE than .0003 top to
bottom. This exacting clearance makes this a 100,000 mile valve job with no