Cam deviation at 6 after VC pads done

[Homeoboxter]

Originally Posted by flmont

What is the time frame to accomplish this if your a rookie. 2 weekends ??

If you do it with the engine in place it`s probably doable in two weekends. I pulled the engine because it had to be torn down completely, but it`s not necessary. Just much easier on an engine stand. First I`d look at the cam deviation values and cut apart the filter or even pull the sump to see how much plastic debris you have accumulated there.

[flmont]

OK..I shall start with that,.I have watched the filter every oil change and I don't see anything alarming But I have never pulled the sump plate, I even do random filter checks, But I still get that noise on a quick start,if I crank it over a couple times first and when it does start I don't really hear what I think is chain rattle noise but My Cam numbers are like 3.4 and 8.2 so I figure it must be that and that is why Iam trying to look at the guides B 4 I pull that engine Bc that noise make me crazy... Thanks for the info,.!!

[ike84]

Originally Posted by flmont

OK..I shall start with that,.I have watched the filter every oil change and I don't see anything alarming But I have never pulled the sump plate, I even do random filter checks, But I still get that noise on a quick start,if I crank it over a couple times first and when it does start I don't really hear what I think is chain rattle noise but My Cam numbers are like 3.4 and 8.2 so I figure it must be that and that is why Iam trying to look at the guides B 4 I pull that engine Bc that noise make me crazy... Thanks for the info,.!!

I would install the revised pressure relief valve and spring while you're at it. Only takes 5 minutes.

I haven't seen anyone really comment on this but I would be curious to know if over time guys running the updated parts have less vc pad wear.

Sent from my POCOPHONE F1 using Tapatalk

[blue62]

Originally Posted by flmont

OK..I shall start with that,.I have watched the filter every oil change and I don't see anything alarming But I have never pulled the sump plate, I even do random filter checks, But I still get that noise on a quick start,if I crank it over a couple times first and when it does start I don't really hear what I think is chain rattle noise but My Cam numbers are like 3.4 and 8.2 so I figure it must be that and that is why Iam trying to look at the guides B 4 I pull that engine Bc that noise make me crazy... Thanks for the info,.!!

Which bank has the 8.2???????

[flmont]

Hey blue62, I will ck my notes, Frank

[blue62]

Originally Posted by flmont

Hey blue62, I will ck my notes, Frank

The reason I ask is that it seems as though most cam deviation issues here on the forum are on bank 1.
So I am curious and wondering why the issue favors bank 1.

[pilot4fn]

Originally Posted by blue62

The reason I ask is that it seems as though most cam deviation issues here on the forum are on bank 1.
So I am curious and wondering why the issue favors bank 1.

Good call blue62. Mine 2001 2.7 has also bigger CamDeviation on bank1...
Bank 1: -8.22
Bank 2: -5.11

Plan is to drive this summer and pull the engine out next winter to change the VC pads (and clutch, FW, IMS, RMS,...).

[flmont]

Bank 1 =9.12 Bank 2 = 3.97

[Homeoboxter]

Originally Posted by blue62

The reason I ask is that it seems as though most cam deviation issues here on the forum are on bank 1.
So I am curious and wondering why the issue favors bank 1.

Interesting observation. When I looked through the forum for variocam failures I found reports only for bank 1, never for bank 4. I`m talking about the green rubber debris that accumulates in the sump when the O-rings disintegrate inside variocam 1-3. I don`t know if it`s related.

As for the deviation: in my 99 986 base the chain pad at bank 4-6 was worn down to the ground and fell off. Bank 1-3 was not that bad. So it looks like an exception, I know nothing about the deviation values before the rebuild though.

[blue62]

Originally Posted by Homeoboxter

Interesting observation. When I looked through the forum for variocam failures I found reports only for bank 1, never for bank 4. I`m talking about the green rubber debris that accumulates in the sump when the O-rings disintegrate inside variocam 1-3. I don`t know if it`s related.

As for the deviation: in my 99 986 base the chain pad at bank 4-6 was worn down to the ground and fell off. Bank 1-3 was not that bad. So it looks like an exception, I know nothing about the deviation values before the rebuild though.

Yup it was something that my brain locked on.
seems most issues are with bank 1
Another interesting thing is that 986's for the ROW market only report Camshaft Deviation values on bank 1. Or so I have read.
So why does bank 1 seem to have more issues that bank 2 in relation to Cam timing (Vario Cam timing components)issues??? Engine rotation direction creating certain wear patterns???? That's the only thing I have come up with so far. But it is just a WAG