Replacing valve stem seals in 305 H.O. small block chevy from 1986 Monte Carlo SS
I'm putting the original 305HO back in the Monte after taking the ZZ3 out for my Iroc project. This is mainly to make the car mobile but it may end up tagged with this engine for a while. Previous owner reported that this 305 has over 100k miles on it and has been out of the car since 1997. He said it smoked during startup and sure enough the valve stem seals were worn out. Hopefully this will fix the issue.
Valve seal Replacement
Leaking valve seals cause your engine to smoke when you first start it up,
and then it usually runs the rest of the day with no smoke. Usually
replacing the valve seals will fix the problem. Here's how to do it. Of
course other engines may vary to some degree but the basics are the same.
How to Adjust Valve on a Small Block Chevy
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customers. Rated #1 Click on blue link
This video shows our procedure how to properly adjust valves. This works on
all engines with adjustable valve train. Produced by enginefactory.com
Worlds leader in turn key muscle car engines.
Investigating Chevy 305 burning oil at idle
[[UPDATE: after wasting money on valve stem seals without fully
investigating what the issue definitely was, i finally took off the right
side valve cover which has NEVER been taken off..i found the the rear oil
drain hole (theres 2, 1 in the front 1 in the back of the head) was plugged
with fiber which is from the 10 year old air filter i had been using..so
basically the ENTIRE valve cover was filling with oil force feeding oil
into the cylinders. Goes to show, routine maintenance is not a joke..i
figured an air filter is an air filter, but i guess not lol.After 10
minutes of idling the Exhaust will
start making blue smoke and it looks kinda like "Uncle Buck" lol. It VERY
rarely smokes when i drive, only when i take off.
Testing for Leaking/Bent Valves
--Please Read-- :)
Some of the best advice I can offer you about fixing your car is to search
for an online forum related to your car, or even for your specific engine.
If you have a popular car or engine, this can be an amazing tool in
diagnosing and fixing cars yourself!
1. Get kerosene, gasoline, or break cleaner.
2. Tilt head on its side, with the ports of the valves you're testing
pointing up and exposed.
3. Fill the intake or Exhaust ports
with the liquid you chose, make sure to use enough liquid to cover the back
of the valve head completely inside the port.
4. Look at the valve surface in the combustion chamber for leakage. (Let it
sit for several minutes)
5. If there is a leak, you could have a bent valve or just a bad seal of
the valve to the head. You might have to replace the valve, or just use
some lapping compound to lap the valve/seat to resurface.
6. Repeat for the other side if you wish.
7. This is a great time to replace valve seals if you have noticed they are
worn too much.
8. If you have any questions, please post them here and I'll try to answer
You just tilt the head on one side or the other depending whether you want
to test the intake or Exhaust valves.
I'm testing the intake valves in this video. I did this way because I
didn't have the leakdown test equipment, but also because I wanted to
replace my head gasket anyway. I wouldn't say this is the best way to test
initially if you suspect leaking or bent valves because it requires you
remove the head. Try just a regular leakdown test first. But if you're
taking it off anyway it's pretty nifty and doesn't require the leakdown
test tools. There are several methods to do this, this is just the one I
chose in my situation.
HowTo - Change Valve Stem Seals
Thought I'd take a moment to post a how-to guide. Got the head off your
engine for any reason? Head gasket kits usually come with a new set of
valve stem seals. You can install them yourself with one simple tool. It's
totally worth doing, old hardened seals will allow oil into the engine
which will cause a blue smokey cloud at traffic lights or when restarting
the engine. Easy fix, just follow my guide.
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.
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
hydraulic valve lash adjustment small block chevy
there are many ways to adjust valve lash. this is just one example and has
worked well for me. you can do it any way you want just make sure the
lifter is on the heel of the cam and between a half to one turn of preload
How to Reseat / Lap Valves (Basic Valve Job)
In this video i'm explaining how to reseat or lap valves in a flathead or
overhead valve engine. Also can be called a valve job, but this is not a
complete valve job. I also used to much valve grinding compound, it does
not require a whole lot. Usually when a engine needs this done is when a
engine has low compression that is found to be leaking around the valves,
or sometimes a engine will backfire do to the valves not closing
completely/properly. Thanks for watching.
Engine build part 7
Here is the link for the series on a DVD
Distributor Install on Chevy Small Block
Finding #1 firing position and Installing Old School distributor on Chevy
Small Block.This video will only get the timing close enough to get the
engine started. The timing still needs to be fine tuned after the engine is
Disclaimer: To the best of my knowledge this video is accurate. I am in no
way responsible for any occurance resulting from following the instructions
in this video.
How To Tell If Your Engine Is Worn Out
Scotty Kilmer, mechanic for the last 45 years, shows how to test your
engine to see if it's just plain wearing out internally. A simple test with
a 50 dollar tool will show you. And if you want to ask Scotty a question
,he is now answering everyones' car questions live EVERY Saturday at 10 AM
CST on google events. Just be a member of google plus, and you can ask your
own question on Saturday morning.
Rat Rod vs Lamborghini Aventador! Roadkill Episode 5
On this episode of Roadkill, HOT ROD's David Freiburger and Mike Finnegan
spend 24 crazy hours with a 1930 Model A Rat Rod and a 2012 Lamborghini
Aventador to find out which wildly impractical, larger-than-life car
attracts the most attention.
Roadkill appears every fourth Friday on the new Motor Trend channel.
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