Personally i think this is the correct place for this thread!! but i have a diesel so cant really say. However I did have a ZS180 which had done around 20K and the VIS valves were fine at that point.

 

I have the rattle once in a while but not looked into it yet :spanner:

 

How would I know?

What would this problem be like / sound like? What would I notice?

 

I get the rattle on my 2.5 kv6 only when the auto choke is on and the engine is still cold and idling high, When it warms up the noise goes and it runs fine.

Its a bit of a pain but it does not appear to be affecting the performance yet, still getting the 3,000 rpm boost so I will probably leave it for now.
Is the rattling metal sound a butterfly type valve or the motors.

 

This may not be the best place to post this thread, but I thought it's a good place to start. Mods feel free to move it if necessary.

Posting it here is just fine.

Ken

 

Touches a MASSIVE plank of wood, but i havent had any problems yet.

 

Just got the 75 back from the manifold replacement, boy there is a difference in lower end power.Didn't realize how much lower end power was missing until I got it back.Now drives as smooth as silk.It just shows, all I thought was wrong was a rattle when I first started it up and reved it up but there must have been somthing wrong with the butterflies in the manifold.

 

Does anyone have a "dead" VIS actutor and/or manifold they are willing to donate???

 

I have a complete manifold + vis motors if anyone wants it,
Free to good home Dave Goody

 

This may not be the best place to post this thread, but I thought it's a good place to start. Mods feel free to move it if necessary.

Most people who have the KV6 engine and are on this forum are probably well aware of the problems with the KV6 inlet manifold.
So, I thought it might be useful to get an idea how many failures we are getting.
i.e. Complete manifold, idle solenoid, VIZ balance valve and power valve motor.

What inlet manifold problems? Panic mode on!!!

 

Can you un-plug these to see if all goes quiet again? or will that cause more trouble?

Mines a little flat below 3000 and i can hear ticking from inside when its idling.

 

I had my manifold changed last week and the dealer gave me the old one back. In order to get inside you need the break the thing open.

If you just have a ticing noise I would get the motorised valves changed asap, if you hear a rattling noise you will need to change the manifold.

I keep meaning to get some pictures posted of my old manifold.

 

Hi did you get some photos from the opened mainfold ??

If, where can i find them

 

if you hear a rattling noise you will need to change the manifold.QUOTE]

Sorry to disagree, our ZS had the odd rattle and fault code logged. I changed the motors 2 weeks back and its now as good as gold. As posted a few threads up by genpk, the power delivery is a lot smoother and more responsive below 3k. Before it only came to life at 3k but the delivery is sweeter now and no fault codes as well. The dealer sorted out the parts for £89, granted some do need manifold changes albeit rare but my money is to gamble on a pair of motors first, if it does not fix it, get a refund and then new manifold.

 

Lates, I am a bit rusty on the workings of these VIS actuators. How many do you need (or does the car have should i say). Is you ZS the V6???

Mine has a ticking noise, sounds a bit like tappets. I have been told this is the VIS valves, but did you pay £89 including fitting to have this sorted. If you don't mind me asking, what garage did the work for you???

 

If im getting vibrations through the car on idling does this mean I need to replace the idle solenoid ?

 

Mine Too!

I get the rattle on my 2.5 kv6 only when the auto choke is on and the engine is still cold and idling high, When it warms up the noise goes and it runs fine.

Its a bit of a pain but it does not appear to be affecting the performance yet, still getting the 3,000 rpm boost so I will probably leave it for now.
Is the rattling metal sound a butterfly type valve or the motors.

I get exactly the same, except that lower down the rev range (especially in 1st) there is a lack of power-not always all the time-is this indicative of an inlet problem? Also she is sucking a lot of oil up (not burning it).

 

It makes me glad that the vacuum operated system on the Honda 2.7 V6 is so reliable (touching wood right now!).

 

Can you un-plug these to see if all goes quiet again? or will that cause more trouble?

Mines a little flat below 3000 and i can hear ticking from inside when its idling.

Ticking on idle is usually the idle solenoid - little black cylindrical thing with a wire ontop - can be unplugged while engine running to check - it is normal.

VIS tick usually 'off' idle and possibly when accellerating.

 

Lates

You could be right, but my car had the rattle and whilst it was down on power anything above 2500 rev it would sound fine. The car seems to mask the sound well. However once i had broened open the old manifold it showed that the engine was only working on 2 of the 6 inlet holes. The pivot points on the butterfly were worn on 5 of the 6 outlets. The arm that operates the butterflies was only connected to 2 of the 6 butterflies.

I will try and get the camera out tomorrow and post some pictures.

 

Lates, I am a bit rusty on the workings of these VIS actuators. How many do you need (or does the car have should i say). Is you ZS the V6???

Mine has a ticking noise, sounds a bit like tappets. I have been told this is the VIS valves, but did you pay £89 including fitting to have this sorted. If you don't mind me asking, what garage did the work for you???

Our Zed is the 180V6 yes mate.There are two vis acutators, both different. The price I paid was for parts only and had a better deal than normal as all my stock comes from the same dealer. I would guesstimate around 3/4's of an hour to replace including clear any fault codes if you have some. I repaired the Zed myself.HTH

 

Ticking on idle is usually the idle solenoid - little black cylindrical thing with a wire ontop - can be unplugged while engine running to check - it is normal.

VIS tick usually 'off' idle and possibly when accellerating.

Be a little careful gents unplugging things whilst the engine is running unless you have a gadget to clear any fault codes.

 

I think that more people have the problem than you would like to think, but perhaps do not realise it.

Often, the first people know when there is an issue is when the car goes on a rolling road and they find a hole in the torque curve.

It only becomes apparant that driveability had been affected once the problem is resolved and the performance improvement is noticed.

I am certain my 75 V6 had an issue with only 25,000 miles on the clock. At the time, I did not know as the car was quite new but the car would often hesitate as the throttle was pressed down at low RPM. I think this was likely to be the valves sticking. It also made a ticking at idle on occasion, but rarely.

It is a shame the MIL light does not come on to make the driver aware of an issue.

Richard Moss, indeed the 827 system is great. You are able to visually check it when the car is stationary by taking the car through the revs and watching the valves move into the centre and then towards the bulkhead.

I have seen the 827 system fail a couple of times, but all that needed to be done was one of the two solenoids replaced in the black box with all the vacuum pipes on the bulkhead.

No wonder they used that block for the NSX!!

 

inlet maqnifold

I have just joined and would like to know the cause of this rattle,I get it sometimes when slowing down on my 75 2.0 v6
thanks Basil, great website.

 

I get exactly the same, except that lower down the rev range (especially in 1st) there is a lack of power-not always all the time-is this indicative of an inlet problem? Also she is sucking a lot of oil up (not burning it).

The lack of power down low could be the VIS but not sure about the oil thing. Where is it going if it aint being burned. I hope not into the water jacket ?

 

The lack of power down low could be the VIS but not sure about the oil thing. Where is it going if it aint being burned. I hope not into the water jacket ?

I think he means there is oil in the intake but the car doesn't smoke - hence 'doesn't burn it'. But I think as you say it has to burn it, i think as its such a small amount it does get burnt with no visible or detrimental effect, like to the cat.

Mine just dribbles out of the airfilter as its located down behind the bumper.

I need to give the filter a clean actually as I have a mesh grille where the blank plate was so when I wash the car water hits the filter and you can see oil in the water when it runs off onto the drive.

 

I take back what I said.

I'm having the new Vis Valves fitted next Friday!