--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. 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 them quickly.
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.
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 gearhead's garage.
Edelbrock RPM Olds 455 Head Porting
The scariest thing I ever did was port a set of new Edelbrock aluminum cylinder heads. My first attempt at porting any cylinder head. I raised the roof .200" and dropped the floor .040". It's best to leave the floor alone or raise it by filling with epoxy. Porting kit by Mondello.
Checking a Cylinder Head for leaking valves
Sometimes when you remove a head it's easy to see that the valves are leaking. And, sometimes it's hard to tell. But you don't want to risk putting them back on without knowing for sure. Here's a simply and easy way to find out.
Fitting new valve guide seals without removing the cylinder head Suzuki Vitara
This is how you can remove and replace valve guide seals with the head still on the engine. Normally you have to have the head off so you can fit the valve spring compressor on to the head of the valve. I had heard of this method but never tried or seen it done before. The only special tool is a piece of string.
Watch the video and see the "Essex Red Neck" at work :-)
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 Stem Seal Replacement - CntrlSwitch How-To
This is a complete How-To Video for replacement of VSS in a 3000GT VR4. This is the first time I've done this job so everything might not be perfect and I'd appreciate more experienced 3S mechanics to offer their advice as well in the comments section. Took alot of extra time to film & edit the video so I hope you enjoy & learn a little from my video.
*You can download the repair manual from here: http://www.3sx.com/faq/manuals/
Subaru Impreza 10000 RPM engine
Takhle vypada subaru motor kteremu upadne ventil v 10000 otackach. - This is Subaru engine, broken valve in 10000 RPM. This was not poorly tuned, EGT and AFR was right, Problem was in material of one of the Cosworth valves, there was air bubble in it and it broke apart. This was not one shot as you think, this car was running few months before this and it is running again fine after repair. But we changed manufacturer of vents :-)
How to lap valves on a 1995 Eclipse Talon 420a head (non-turbo)
When my 1995 eclipse timing belt broke I knew that there was a 99% chance that the valves were bent in the process. I searched the internet for a good way to replace them, without having much luck. I figured I would try and come up with something myself, I figured I would document the whole process of valve lapping by video...hope this helps you if you are in the same bind as I was!!!
World's Worst Intake Manifold Coolant Leak
The Chevrolet/GMC 4.3L & 5.7L CPI Vortec engines had a horrible problem with the plastic intake manifold gaskets cracking around the coolant passages. I've replaced many of the gaskets and a few manifolds on various vehicles. This was the absolute worst lower intake manifold gasket coolant leak I've seen in a long time. It was a Chevy S10 Blazer with a 4.3L. I removed the power steering/AC bracket and the EGR valve to get to the leak. Otherwise it was just water running out under the compressor. I had my camera with me, so I thought I'd share the video.