tapping after putting in 272's

[95 tsi awd]

did anyone ever hear of a tapping noise after they put 272 cams in with stock valves and springs and pretty much a stock head? it doesnt tap at idle its between 2.5k rpms and 3.5k rpms.

 

[funkbuster]

sounds like valves tapping pistons, hard to say though, I have never put cams in either of my dsms, although it is on the list.

 

[ILLiCliPSE]

you sure you didnt put the cams in backwards/ wrong?

 

[95 tsi awd]

i think the person they were bought from had the same problem. this is in a 93 tsi awd

 

[dsmdragon]

Well the fact that you put 272 cams with stock valves and springs says it all. You should check make sure they are facing the right way and also did you test the springs before you put them back in the car.
Stock springs cant hold up very well when you are trying to open the valves more the spring is getting compressed more, and the stock springs can't handle the added strain.
You should add new springs and valves to the next thing you do. Or that might be a valve getting beat-up by a piston soon. You might think about adding some light weight retainers to that to rev faster since you are in there already.

 

[JayRolla]

Well the fact that you put 272 cams with stock valves and springs says it all. You should check make sure they are facing the right way and also did you test the springs before you put them back in the car.
Stock springs cant hold up very well when you are trying to open the valves more the spring is getting compressed more, and the stock springs can't handle the added strain.
You should add new springs and valves to the next thing you do. Or that might be a valve getting beat-up by a piston soon. You might think about adding some light weight retainers to that to rev faster since you are in there already.

I agree, my mechanic has personally through out a few heads with 272's on stock valve train. How loud is the tapping?? Like a lifter tick or is it loud like a valve slap?

On a side note my mechanic bought a set of FP3x's and when they installed them they said something wasnt right. Come to find out the intake cam was ground as an exhaust cam and the exhuast cam was ground as an intake cam. Needless to say FP could have killed that motor. They did get the cams free.

 

[ypnas777]

You don't need to upgrade springs with 272s. I just put it 272s this past weekend and I have no noises or anything, car runs better than ever. Also, many people on this forum and from my local dsm club put on these size cams with the stock springs and everything is fine, no need to upgrade springs unless your using 280s or bigger. I would put my money on that the tapping noise has to do with an install error. I would take off the valve cover and look over everything. Is the car running fine?

 

[95 tsi awd]

how much would that cost for valves, springs, retainers? can i just put the stock cams back in and will it go away? has anyone ever heard of this problem?

 

[donmagicjuan]

Well the fact that you put 272 cams with stock valves and springs says it all. You should check make sure they are facing the right way and also did you test the springs before you put them back in the car.
Stock springs cant hold up very well when you are trying to open the valves more the spring is getting compressed more, and the stock springs can't handle the added strain.
You should add new springs and valves to the next thing you do. Or that might be a valve getting beat-up by a piston soon. You might think about adding some light weight retainers to that to rev faster since you are in there already.

What you're stating here certainly sounds logical, but I'd be wary about formulating the argument that upgraded valve springs and retainers should accompany every single 272 cam install. Many people have in fact had very good luck using the stock valvetrain with this setup, myself included. The consensus seems to be that upgraded springs and retainers are likely not necessary with a 272 profile, but rather serve as positive insurance for the extra careful.

To the OP, what I'm getting at is that I wouldn't jump to the conclusion that you need to replace/upgrade your valvetrain. I would proceed by eliminating other possible causes, beginning with a check to make sure the cams have been installed and aligned properly. Let us know what you find after that and we can move on.

Good luck.

 

[95 tsi awd]

it runs fine has no lost power it still pulls fine.

 

[ypnas777]

Do you know what kind of cams they are? I wouldn't upgrade the springs, just make sure the installation is correct.

 

[JayRolla]

What you're stating here certainly sounds logical, but I'd be wary about formulating the argument that upgraded valve springs and retainers should accompany every single 272 cam install. Many people have in fact had very good luck using the stock valvetrain with this setup, myself included. The consensus seems to be that upgraded springs and retainers are likely not necessary with a 272 profile, but rather serve as positive insurance for the extra careful.

To the OP, what I'm getting at is that I wouldn't jump to the conclusion that you need to replace/upgrade your valvetrain. I would proceed by eliminating other possible causes, beginning with a check to make sure the cams have been installed and aligned properly. Let us know what you find after that and we can move on.

Good luck.

How high do you rev though, to get full potential of the cams you want to rev it up, and thats dangerous on stock valvetrain.

 

[donmagicjuan]

How high do you rev though, to get full potential of the cams you want to rev it up, and thats dangerous on stock valvetrain.

Heh, this would probably be true if I ever upgraded to a larger turbo. For now, though, the EvoIII runs out of steam right around redline or a little past. I see what you're saying, and all I can offer you in response would be hearsay from those who have ventured into 9k territory without any problems, so I'll refrain. Perhaps someone can attest to the revving potential of the stock valvetrain on a 272 cam who's been there and done it already. Judging by the OP's apparently stock setup, though, I'll still contend that he doesn't need to rush out and buy new springs just yet.

 

[ypnas777]

Tha has nothing to do with this topic though. The stock springs shouldn't be causing the tapping noise. Also, 272s aren't really meant for very high reving, thats what the 280s are for. The 272s are fine for a stock valvetrain. There is a guy is newengdsm reving to 9k on the stock valvetrain, no problems as of yet.

 

[95 tsi awd]

there web 272s. its got a t3 turbo reving 8k

 

[JayRolla]

there web 272s. its got a t3 turbo reving 8k

How old are the webs? Didnt those cams have problems with wearing down lopes a long time ago?

 

[95 tsi awd]

i really dont know. should i just put the stock cams back in?

 

[JayRolla]

I would to see if it helps. If it goes away I would have the cams checked by a pro to see if they are in spec.

 

[95 tsi awd]

well has anyone ever heard of this problem or had this problem?

 

[bento]

Put the stock cams on to see if it still does it. If it doesn't than you know you need to upgreade your valve spings.

 

[BrooklynBomber]

Sounds like to me that the cams were not installed properly. Im not a wiz with the 4g63 just yet but i do know the sr20 motors very well, we have a set of cams called S3's which are the equivalent to the 272's and if you dont install the correctly you have the same issue. You should not have to upgrade your valvetrain unless the motor has alot of miles on it which would make the springs weak. Because the motor is an interference if the cams are not installed just right you will hear valve noise. I would try looking for a thread on the install or going to a mitsu dealer and getting them to print out the proper cam install procedure

 

[toofast82]

this is a 2 year old thread, im sure hes come up with something by now, i hope

 

[BrooklynBomber]

this is a 2 year old thread, im sure hes come up with something by now, i hope

.... that's funny i should have looked at the date. why the hell would he answer a 2yr old thread.

 

[jjgrizz73]

...id hope by now he did.