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.
Is this a bad tensioner sound?
I've had this car for about 7 months or so. I've had this sound secondary
sound start coming from my engine. Anyone know what it might be?
H22a4 Bent Exhaust Valves
Just to clear up a few misconceptions, this is the sound of cylinder #2
bent Exhaust and intake valves. Not
rod bearings, rod knock, or anything else. I paid to have the head rebuilt
with all new valves, seats, springs, and retainers.
It sounds the way it does because a piece of a broken drill bit wedged
itself in between my Exhaust valves
and seat. It runs perfect now and I've put 13,000 miles on it since.
Honda D16Z6 Assembly Animation
Honda D16Z6 modeled in Solid Works for ME 621 at Ohio State. This is the
assembly video. For the run video,
1994 Honda Accord w/ Bent Valve
A video illustrating how your 94 Accord's engine will probably sound if it
has a bent valve. Bent valves often happen in cars containing intereference
engines, such as this particular model of Honda. They occur most often when
the timing belt breaks during operation of the engine. This is an expensive
repair, requiring the engine head to be dismanted. To avert this disaster,
change your timing belt every 90k miles or sooner. This particular car had
about 178k miles on it at the time of the video. There was a bent valve in
cylinder 2, and the cylinder lost all compression.
Honda accord timing belt noise
UPDATE.-Timing belt has been loosend however noise still remains-------ive
had my timing belt replaced and now it seems to be making this strange sort
of noise around 1000rpm as you can see, do YOU think this is a serious
problem? leave us a comment and tell us what you think
Gsr b18c1 bent valve or need valve adjustment?
After a short pull from 60-90 mph my car starting bogging.
1. i thought it was the spark plug so i swapped it out. ran better but
still shitty as hell.
2. Checked timing when i got home, it was about a tooth or two off. I'm
sure it jumped timing
3. re-did my timing, now it runs better but still has misfire revving pass
4. its also making noises that wasn't there before, not sure if it's a sign
for bent valve or need valve adjustments? any help would be appreciated.
5. also, while it warmed up, i took out spark plug #4 and it was boggin
like it wants to die, also with #3, while #2, and #1 didn't do anything? i
did research and it says if nothing it could be signs of bent valve? lmk.
Pruven Performance engine melt down 4 cracked pistons, 8 bent valves.
Pruven Performance screwed up brand new Evo IX after this run the car had 4
cracked pistons, 8 bent valves, warped head and a long list of issues car
had to be taken to AMS for a new engine and head.
Video of the way the car was picked up!