ok i know this is a dumb ?, but im just getting new into the TT world, what exactly does lifter tick affect? or is it just more of an annoyance? thats right.....flame

 

Yes you can get tick with 99 lifters

 

ok i know this is a dumb ?, but im just getting new into the TT world, what exactly does lifter tick affect? or is it just more of an annoyance?

Its an annoyance thats for sure but any part of my engine not getting enough oil worries me.

 

Its an annoyance thats for sure but any part of my engine not getting enough oil worries me.

Two thoughts:

1. Fuel contamination seems to aggravate the lifter tick. Advise if you get some relief right after you chage your oil. (I get hints of lifter tick at ~.5% fuel contamination - built in reminder to change the oil. )

2. Oil pump cavitation (due to fuel contamination or lack of oil supply in the sump) at high RPM could cause air to get trapped in lifters which might explain why you get no startup tick and only experience lifter ticking after a spirited run.

 

Two thoughts:

1. Fuel contamination seems to aggravate the lifter tick. Advise if you get some relief right after you chage your oil. (I get hints of lifter tick at ~.5% fuel contamination - built in reminder to change the oil. )

2. Oil pump cavitation (due to fuel contamination or lack of oil supply in the sump) at high RPM could cause air to get trapped in lifters which might explain why you get no startup tick and only experience lifter ticking after a spirited run.

Good call. Ill replace the oil filter, Run some injector cleaner and possibly do a engine flush. It is doing this ticking on a new Oil change under 1000 miles.

 

Pull the front valve cover off and see if they put the 3rd gen lifters in.I have seen 3rd gen's tick also.Normally at low idle is when they will do it.

 

Only after a spirited drive and then idel did i get lifter tick.

That sounds familiar...push the clutch in and see if it goes away.

 

Try changing just the oil and then just the filter to see if either one of them were contributing to the tick. (You may also want to try filling ~ .5 quart over full mark to see if it is a sump problem.)

 

That sounds familiar...push the clutch in and see if it goes away.

???? explain

 

???? explain

The throw out bearing is also notorius for clattering and sounds like lifter tick. If you push the clutch in and the noise stops...it's your throwout bearing that's bad, not lifter tick.

 

I meant ill change the fuel filter i saw i typed Oil filter .. (doh)

The throw out bearing is brand spanking new. Just got it from First team Mitsu 38$. The tap is coming from the valve cover.

Can you guys explain the Sump Problem?
(it might not be this but it wouldnt hurt to learn about it)

 

I had oem '99 lifters and was getting a lifter tick as well. After removing the valve covers I noticed that there was a little play on some of the rockers. Did not though of this much as I thought that the lifters had just bled down a bit. I bought another set (non-oem) from a board member and noticed that his lifters were slightly longer. There is no play anymore, havent cranked the car yet but I am quite confident it'll be quiet.

Heikki

 

Anyone who was at South East track day cook out can tell you, my car lifters were ticking a little. Not near as bad as when I had the 91 though.

 

Oh.. Look at all these people coming forward. It seems to be pretty common then. Im sure a engine flush or maby a ATF treatment might knock out any fact its dirt/build up on the lifters. After seeing all this, my concerns are addressed that the 99 lifters are installed.

I bought these lifters off a board member as aftermarket allso.

 

I meant ill change the fuel filter i saw i typed Oil filter .. (doh)

The throw out bearing is brand spanking new. Just got it from First team Mitsu 38$. The tap is coming from the valve cover.

Can you guys explain the Sump Problem?
(it might not be this but it wouldnt hurt to learn about it)

As per earlier post, do you get relief from ticking shortly after you change your oil??

I suggest a controlled test by first replacing OIL filter and then change the OIL to see if it changes / fixes incident of lifter tick.

(I can easily get .5% fuel contamination in less than 1000 miles if I spend a lot of time at WOT and will get some ticking until I change my oil.)

WET SUMP ISSUE
At high RPM, there is a lot of oil being pumped up to the top of the engine and it takes time for the oil to return to the sump. This causes the available oil in the sump to be reduced and increases the chance of sucking in some air, especially if the high RPM are combined with high G forces from acceleration / braking / cornering.

 

Mine NEVER ticked for the first 30,000 miles. Now they do on startup when the car sits in the cold for a day or two. My rockers had some play in them too (155,000 miles), so I'm betting rocker replacement is the only permanent fix.

 

Mine NEVER ticked for the first 30,000 miles. Now they do on startup when the car sits in the cold for a day or two. My rockers had some play in them too (155,000 miles), so I'm betting rocker replacement is the only permanent fix.

I'm always trying to keep an open mind but I don't think rockers have anything to do with lifter noise.

Here's my take on lifter operation / noise. Let me know if you agree / disagree.

HYDRAULIC LIFTER OPERATON / TICK - ACCORDING TO CLINT

1. Lifter shaft extends/contracts to provide optimum clearance between cam lobes, rocker arm and valve stem. Too much clearance = noise. Too little clearance = burned valve

2. Lifter has has an internal check valve, spring and asymetrical oil passages that control the rate that it extends / contracts.

(good learning experience to play with a lifter, diesel fuel, paperclip and a vise to compress it)

3. Oil stored in the lifter is what supports the load of the valve spring - NOT oil pressure. Oil pressure just repleneshes the oil in the lifter

4. Noise occurs when air gets trapped in the lifters causing rocker arm to slap up/down on the top of the valve stem.

Now the question - how does air get into the lifter??

5. When the engine stops, the rocker arms come to rest on different portions of the cam lobes although only occasionally does one get parked on the apex of a cam lobe

Sidebar: I think we have all heard this and it makes a VERY loud racket that goes away faster if you shut off the engine for 3-4 seconds and give the lifter a chance to fill. (Remember the lifter has its own spring and will fill with oil even without oil pressure - it just needs a supply of oil.)

6. While the engine if off, the oil trapped in the some of the lifters begin to beed down based on pressure from the cam lobe / spring (Lifters not being compressed will not bleed down)

7. When the engine is first cranked, there will be extra clearance due to the lack of oil volume in some of the lifters but those lifters should fill quickly with oil - ergo no noise.

8. However, if a lifter gets a slug of air (possibly due to bad anti-drainback valve or just from sitting for an extended period and air in the head channels) it will be noisy for a while until the air works its way out of the lifter.

9. 1G versus 3G lifters comes down to differences in the internal asymetrical ports that control bleed down / fill times. 1G lifters bleed down slower than 3G. The external size of the hole has almost no bearing on operation of the lifter.




Clint