Cam adjuster seals and suck valve. Part of a series?

4Driver4 · 01-12-2005, 06:17 PM

OK, so a few days ago I posted that my wife's A6 2.8, which has never leaked, suddenly began leaking from the cam adjuster seal on the passenger's side. I had planned to wait until Spring when I was going to do the timing belt anyway, but the smell is bothering her, so I decided to do it this weekend (along with the belt, etc.) while she is out of town.

The forum (forget who) directed me to an old post about the "suck pump" (forget who's post). I stopped at Audi to ask about the suck valve and buy some cam adjuster seals. Well, it turns out that they strongly suggest checking/changing the suck pump, a check valve, and the long crankcase vent hose that runs across the front top of the engine to the rear. I just recently replaced the vent pipe so I asked to buy the check valve and suck pump. No problem on the valve, but the pump cannot be bought without first being put on a "waiting list" at Audi. This requires a VIN number. Wow. Apparently, replacing this pump is all the rage. My wait was short and now I have my pumps.

This makes me wonder about the seals. Pressure inside the crankcase has forced oil by the seals. In theory, if I remove the pressure, the seals should stop leaking unless they are damaged. So the plan now is to replace just the breather stuff and the suck pump, wash the engine, and monitor the situation. I will report my findings.

Eric 2.7 · 01-12-2005, 06:29 PM

but, I ended up having to replace the cam adjuster gaskets anyway. I think in my case, once the oil got pushed past the gasket and rubber half moon, it kept leaking.

Hopefully you will have more luck, but you'll know pretty quickly if that didn't work.

I was able to change gaskets on both sides w/o removing the cams. You could just replace the P side and still do the timing belt later without duplicating work much.

4Driver4 · 01-12-2005, 06:32 PM

If I do anything, I'll do everything. Sometimes it sucks (no pun intended) being AR.

ZIPPYGAS · 01-12-2005, 07:22 PM

how many suck pumps are there? it looks like you got 2. I had my cam seals go and just had them done so I picked up a suck pump (no wait) do I need a pair?

RazeA6 · 01-12-2005, 07:26 PM

melt the ice plug caused by frozen condensate buildup inside the hose. I could not believe how the engine could leak like a sieve and then heal itself overnight in my garage. In my case the seals must not have been damaged. Check my posts from last January to get the full story.

JimR · 01-12-2005, 07:47 PM

;-)

Hey, what's the part number on that check valve? I didn't replace that.

And good luck. Hope you don't need to replace seals.

Twas here.

fl2.7T · 01-12-2005, 09:13 PM

ZIPPYGAS · 01-12-2005, 09:13 PM

I just picked up one pump do I need 2 ????
and do you have a part # for the check valve.

4Driver4 · 01-13-2005, 03:37 AM

Check valve: 078 905 291 B
Suck pump: 058 133 753 B

4Driver4 · 01-13-2005, 03:39 AM

01-12-2005, 06:17 PM	#1
4Driver4 Tech Guru Account #: 43812 Join Date: Oct 2002 Posts: 27,960	Cam adjuster seals and suck valve. Part of a series? OK, so a few days ago I posted that my wife's A6 2.8, which has never leaked, suddenly began leaking from the cam adjuster seal on the passenger's side. I had planned to wait until Spring when I was going to do the timing belt anyway, but the smell is bothering her, so I decided to do it this weekend (along with the belt, etc.) while she is out of town. The forum (forget who) directed me to an old post about the "suck pump" (forget who's post). I stopped at Audi to ask about the suck valve and buy some cam adjuster seals. Well, it turns out that they strongly suggest checking/changing the suck pump, a check valve, and the long crankcase vent hose that runs across the front top of the engine to the rear. I just recently replaced the vent pipe so I asked to buy the check valve and suck pump. No problem on the valve, but the pump cannot be bought without first being put on a "waiting list" at Audi. This requires a VIN number. Wow. Apparently, replacing this pump is all the rage. My wait was short and now I have my pumps. This makes me wonder about the seals. Pressure inside the crankcase has forced oil by the seals. In theory, if I remove the pressure, the seals should stop leaking unless they are damaged. So the plan now is to replace just the breather stuff and the suck pump, wash the engine, and monitor the situation. I will report my findings. __________________ 4Driver4 "Never give up the throttle until the bitter end." -RC 1990 Coupe Q 1999 A6 Sedan Q 2.8 2000 A4 Avant Q 2.8 1995 Mazda Miata: the anti-Audi 1999 Mazda Miata: Track beotch 1999 Chevy Suburban: the anti-earth :-( 1990 Nissan Pickup: Snow plow/garbage hauler 1981 VW Scirocco: the car I shouldn't own

01-12-2005, 06:29 PM	#2
Eric 2.7 Member Account #: 61325 Join Date: Aug 2003 Posts: 2,808	That is a valid theory and was the same route I took last winter . . but, I ended up having to replace the cam adjuster gaskets anyway. I think in my case, once the oil got pushed past the gasket and rubber half moon, it kept leaking. Hopefully you will have more luck, but you'll know pretty quickly if that didn't work. I was able to change gaskets on both sides w/o removing the cams. You could just replace the P side and still do the timing belt later without duplicating work much. __________________ Eric 2000 A6 2.7T DIY Mule: Full Timing Belt Replacement, Cam Seals & Cam Tensioner Gaskets, Engine Mounts (TWICE! Thanks Hamburg-Technic/ECS), O2 Sensors, 2ndary Coolant Pump, '03 OEM Sport Suspension, H-Sport Sway Bars, Control Arms, Tie Rod Ends, CV Joint Boots & All Kinds of Maintenance Stuff. Retired: 1996 A4 2.8 2wd 12v 1987 4000CS Quattro 1980 4000 2door (not even an "S")

01-12-2005, 06:32 PM	#3
4Driver4 Tech Guru Account #: 43812 Join Date: Oct 2002 Posts: 27,960	Thanks for the insight. I hope my luck is better than yours. If I do anything, I'll do everything. Sometimes it sucks (no pun intended) being AR. __________________ 4Driver4 "Never give up the throttle until the bitter end." -RC 1990 Coupe Q 1999 A6 Sedan Q 2.8 2000 A4 Avant Q 2.8 1995 Mazda Miata: the anti-Audi 1999 Mazda Miata: Track beotch 1999 Chevy Suburban: the anti-earth :-( 1990 Nissan Pickup: Snow plow/garbage hauler 1981 VW Scirocco: the car I shouldn't own

01-12-2005, 07:22 PM	#4
ZIPPYGAS New Member Account #: 85821 Join Date: Dec 2004 Posts: 321	Re: Thanks for the insight. I hope my luck is better than yours. how many suck pumps are there? it looks like you got 2. I had my cam seals go and just had them done so I picked up a suck pump (no wait) do I need a pair? __________________ 2000 A6 2.7 APR ecu 93chip, Giac tip chip, hx diverter valves, APR bi pipe, snub mount, sway bar, Milltek downpipe and cat back, hi flo intake, silver star fog and high beams.

01-12-2005, 07:26 PM	#5
RazeA6 Audiworld Junior Member Account #: 67951 Join Date: Jan 2004 Posts: 114	Mine stopped leaking after the blockage in the breather hose was corrected - weather warmed up to melt the ice plug caused by frozen condensate buildup inside the hose. I could not believe how the engine could leak like a sieve and then heal itself overnight in my garage. In my case the seals must not have been damaged. Check my posts from last January to get the full story.

01-12-2005, 07:47 PM	#6
JimR Member Account #: 1018 Join Date: Mar 2000 Posts: 46,941	You're welcome. ;-) Hey, what's the part number on that check valve? I didn't replace that. And good luck. Hope you don't need to replace seals. Twas here. __________________ JimR '07 A3 3.2q Lava Gray '99 A8 4.2q Pearl White '99 A6 Avant 2.8q Silver (My old car, son now drives) '06 Boxster S Guards Red (wife's wheels) Support the troops "Over the years, I have come to understand a critical difference between the world of fear and the world of freedom. In the former, the primary challenge is finding the inner strength to confront evil. In the latter, the primary challenge is finding the moral clarity to see evil."

01-12-2005, 09:13 PM	#7
fl2.7T Junior Member Account #: 33138 Join Date: Feb 2002 Posts: 1,130	I hope Jose chimes in on this.

01-12-2005, 09:13 PM	#8
ZIPPYGAS New Member Account #: 85821 Join Date: Dec 2004 Posts: 321	how many????? I just picked up one pump do I need 2 ???? and do you have a part # for the check valve. __________________ 2000 A6 2.7 APR ecu 93chip, Giac tip chip, hx diverter valves, APR bi pipe, snub mount, sway bar, Milltek downpipe and cat back, hi flo intake, silver star fog and high beams.

01-13-2005, 03:37 AM	#9
4Driver4 Tech Guru Account #: 43812 Join Date: Oct 2002 Posts: 27,960	One....for each of my two A6's. Check valve: 078 905 291 B Suck pump: 058 133 753 B __________________ 4Driver4 "Never give up the throttle until the bitter end." -RC 1990 Coupe Q 1999 A6 Sedan Q 2.8 2000 A4 Avant Q 2.8 1995 Mazda Miata: the anti-Audi 1999 Mazda Miata: Track beotch 1999 Chevy Suburban: the anti-earth :-( 1990 Nissan Pickup: Snow plow/garbage hauler 1981 VW Scirocco: the car I shouldn't own

01-13-2005, 03:39 AM	#10
4Driver4 Tech Guru Account #: 43812 Join Date: Oct 2002 Posts: 27,960	Thanks, Jim. I was tired last night :-) __________________ 4Driver4 "Never give up the throttle until the bitter end." -RC 1990 Coupe Q 1999 A6 Sedan Q 2.8 2000 A4 Avant Q 2.8 1995 Mazda Miata: the anti-Audi 1999 Mazda Miata: Track beotch 1999 Chevy Suburban: the anti-earth :-( 1990 Nissan Pickup: Snow plow/garbage hauler 1981 VW Scirocco: the car I shouldn't own

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