IPD - Volvo Parts SpecialistsVolvo PartsVolvo Salvage: Used Volvo Parts and Over 50 Years ExperienceSouthern Vo Vo sells genuine used Volvo parts

Please use this Amazon link ... and help keep MVS on the Web. Thank you!Amazon.com

Advertise here via Google

Login

Not part of the forums? Register. It's free.

Need help? See our Help Page.

1998 S70 Mysterious Oil Leak

Help, Advice and DIY Tutorials on Volvo's extremely popular car line -- Volvo's 1990s "bread and butter" cars -- powered by the ubiquitous and durable Volvo inline 5-cylinder engine.
1992 - 1997 850, 850 R, 850 T5-R, 850 T5, 850 GLT
1997 - 2000 S70, S70 AWD
1997 - 2000 V70, V70 AWD
1997 - 2000 V70-XC
1997 - 2004 C70

1998 S70 Mysterious Oil Leak

Postby kickin_it » 30 Oct 2013, 02:26

I am trying to conquer an oil leak that I have had for quite some time. Oil all over the place but mainly on the front of the motor. I have cleaned the front of the motor and have located a drip, see attached video.



The drip is coming off of the rear timing cover. The oil is NOT coming from the cams, they are clean. The oil is NOT coming from the top of the valve cover, though it was covered in oil, this drip was occurring after the valve cover was cleaned and remained cleaned. I am assuming the only other possible location would be around the crankshaft/oil pump. The oil seems to be dripping and then getting on to the timing belt which then throws it everywhere, not to mention all of the other spinning gears on the motor.

The scary part though, it seems my PCV system is clogged. The entire system was replaced when I replaced the head gasket back in December of 2012. I only assume it is clogged because I am again getting the slight smoke out of the dipstick and some positive pressure.
User avatar
kickin_it
Forum Member
Forum Member
 
Posts: 210
Joined: 27 Oct 2011, 06:52
Location: Franklin, Tennesse
Model and Year: 1998 S70 GLT

Re: 1998 S70 Mysterious Oil Leak

Postby rspi » 30 Oct 2013, 03:16

Do the glove test to see if the head has pressure. If you did a head, you can have a cam cover leak. My bet would be on the rear cam seal, but it can be the crank (have never read about a crank seal leak).

Clean it all up, start the car and shut it down quick. The way that is dripping, you should see it pretty fast. You can look behind the cam and see if the seal is out a little.
'95 855 T-5R, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, '95 960, '97 960, '98 S90, '98 S70 GLT, '95 850 T-5R Yellow
ABS Light? - Volvo Repair Videos
User avatar
rspi
Senior Forum Member
Senior Forum Member
 
Posts: 4875
Joined: 05 Nov 2011, 16:40
Location: Albuquerque, NM
Model and Year: 850 T-5R Wagon

Re: 1998 S70 Mysterious Oil Leak

Postby rspi » 30 Oct 2013, 03:18

Image

Image
'95 855 T-5R, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, '95 960, '97 960, '98 S90, '98 S70 GLT, '95 850 T-5R Yellow
ABS Light? - Volvo Repair Videos
User avatar
rspi
Senior Forum Member
Senior Forum Member
 
Posts: 4875
Joined: 05 Nov 2011, 16:40
Location: Albuquerque, NM
Model and Year: 850 T-5R Wagon

Re: 1998 S70 Mysterious Oil Leak

Postby rspi » 30 Oct 2013, 03:19

That rear cam seal will drip down behind the cover. If the belt is wet, you should replace it as well.
'95 855 T-5R, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, '95 960, '97 960, '98 S90, '98 S70 GLT, '95 850 T-5R Yellow
ABS Light? - Volvo Repair Videos
User avatar
rspi
Senior Forum Member
Senior Forum Member
 
Posts: 4875
Joined: 05 Nov 2011, 16:40
Location: Albuquerque, NM
Model and Year: 850 T-5R Wagon

Re: 1998 S70 Mysterious Oil Leak

Postby kickin_it » 30 Oct 2013, 22:48

I have cleaned the motor. The cams, from what I can see by manipulating the rear cover, appear to be clean and not dripping oil, hence the reason I assumed it was crankshaft and not the cams.

Am I correct in calling these the front cam seals in reference to the way the motor sits? You stated it was possibly the rear cam seal, would this be referring to the exhaust/intake (left/right) seals? Just a bit confused.

I cannot remember from doing my head job, but is it possible to remove the rear timing cover (plastic) without removing the belt, cam gears, water pump, etc...to obtain a better view?
User avatar
kickin_it
Forum Member
Forum Member
 
Posts: 210
Joined: 27 Oct 2011, 06:52
Location: Franklin, Tennesse
Model and Year: 1998 S70 GLT

Re: 1998 S70 Mysterious Oil Leak

Postby rspi » 30 Oct 2013, 23:46

I meant the exhaust cam seal. The front of the motor is the side with the timing belt.

You will have to remove everything including the harmonic balancer to get the lower timing belt cover off. If that front exhaust cam seal looks fitted properly, you either have a cam cover leaking or maybe the crank seal (which I doubt).
'95 855 T-5R, Panther - 22/28 mpg
'98 S70 GLT, Lil' Red
--------------------
Volvo's of past: '87 740 GLE, '79 262C Bertone, '78 264, '95 960, '97 960, '98 S90, '98 S70 GLT, '95 850 T-5R Yellow
ABS Light? - Volvo Repair Videos
User avatar
rspi
Senior Forum Member
Senior Forum Member
 
Posts: 4875
Joined: 05 Nov 2011, 16:40
Location: Albuquerque, NM
Model and Year: 850 T-5R Wagon

Re: 1998 S70 Mysterious Oil Leak

Postby kickin_it » 06 Nov 2013, 01:54

So I took a gander under the hood today. The cam seals are not protruding out like pictured above. I do have oil on top of the valve cover though after cleaning thoroughly. I will snap a pic tomorrow when I have some light. The odd thing is, I do not think it is coming from the oil cap, I do not see any traces of oil from the cap or on the short stem. Majority of the oil is on the front of the engine (passenger side). If not the oil cap I feel there may only be two explanations, either the oil drip is getting on the belt and gears and flinging upward to meet the hood and drip down on to valve cover and collect or the PCV hose next to oil stem is leaking. I tried the look on the backside of the hood to see if I could find any trace of oil splatter but unfortunately my light was not very good. I am a bit confused and do not have access to a lift that would help tremendously in a diagnosis.
User avatar
kickin_it
Forum Member
Forum Member
 
Posts: 210
Joined: 27 Oct 2011, 06:52
Location: Franklin, Tennesse
Model and Year: 1998 S70 GLT

Re: 1998 S70 Mysterious Oil Leak

Postby kickin_it » 07 Nov 2013, 03:39

Here are some new pics of the issue stated above.
Please log in or register to see attachments.
User avatar
kickin_it
Forum Member
Forum Member
 
Posts: 210
Joined: 27 Oct 2011, 06:52
Location: Franklin, Tennesse
Model and Year: 1998 S70 GLT

Re: 1998 S70 Mysterious Oil Leak

Postby kickin_it » 07 Nov 2013, 22:26

OIL EVERYWHERE!

Took the ole S70 to a pick a part to get a seatbelt for $11.00 and ran into some issues. I put some oil in her before we left and hopped on the road, I jumped on the gas to stretch her legs and saw a good puff of smoke, which was new. After all was said and done and I made it home, it appears the Volvo blew the PCV elbow that sits in on top of the valve cover, just to the left of the oil cap. It is no where to be seen and I assume tells me I have a very clogged PCV system. Any opinions?
User avatar
kickin_it
Forum Member
Forum Member
 
Posts: 210
Joined: 27 Oct 2011, 06:52
Location: Franklin, Tennesse
Model and Year: 1998 S70 GLT

Re: 1998 S70 Mysterious Oil Leak

Postby difflock54 » 08 Nov 2013, 02:51

Highly likely yes.
Mind you the elbow may have been loose anyway and chose that moment to part company.
Roberts (rspi) advise about glove test will answer that for sure.
difflock54
Forum Member
Forum Member
 
Posts: 295
Joined: 24 Sep 2012, 03:45
Location: Wellington. New Zealand.
Model and Year: V40 Nordic 2002

Re: 1998 S70 Mysterious Oil Leak

Postby kickin_it » 08 Nov 2013, 04:08

Unfortunately it does have some positive pressure as well as white smoke. I am looking to do a PCV clean-out this weekend as well as cn90's upgrade to heater hose on the PCV system. Hopefully this will fix my leak or at least slow it down, I am still confused as to where it is coming from but I read that too much pressure from PCV may be pushing oil out front of cams or even the crank. All seals were replaced as well as PCV system back in December 2012 that's why this is a bit confusing to me.
User avatar
kickin_it
Forum Member
Forum Member
 
Posts: 210
Joined: 27 Oct 2011, 06:52
Location: Franklin, Tennesse
Model and Year: 1998 S70 GLT

Re: 1998 S70 Mysterious Oil Leak

Postby abscate » 08 Nov 2013, 13:05

..and be thankful the excess pressure blew off the easiest thing to replace on the engine!!
1999 V70 T5 HPT with stick... :-)
2003 Turbo Beetle Convertible with stick :-)
2002 Eurovan camper slusher
2005 V70 with stick :-)
2006 BMW X3 E83 slusher
A fleet of 17 boats and kayaks
3 great teenagers
Shepard Husky
Shepard Lab
Grey cat, ginger cat, black cat
My soul mate of 30 years
abscate
MVS Moderator
MVS Moderator
 
Posts: 2831
Joined: 18 Feb 2013, 00:54
Location: NYC
Model and Year: 1999 V70T5, 2005 V70

Re: 1998 S70 Mysterious Oil Leak

Postby mikealder » 08 Nov 2013, 15:47

When you remove the PCV tank and clean out the oil return port (the lower connection where the tank connects to the front face of the engine) attach the length of 5/8" heater hose to this port and try to blow through it. If you can hear bubbling from the sump it isn't blocked, if you can't blow through it the port is still blocked and needs further work to clear it out. Once the port is clear you can then use the 5/8" hose as a larger bypass pipe for the PCV.

In one of your pictures above I can see what appears to be either gasket or cork style seal that looks as round as the oil filler cap, in fact it looks like it has fallen out of the underside of the oil cap so are you 100% sure the oil cap is sealing correctly - Mike
User avatar
mikealder
Forum Member
Forum Member
 
Posts: 780
Joined: 25 Oct 2009, 13:41
Location: Blackpool
Model and Year: V70 2000

Re: 1998 S70 Mysterious Oil Leak

Postby kickin_it » 08 Nov 2013, 18:11

abscate wrote:..and be thankful the excess pressure blew off the easiest thing to replace on the engine!!


Exactly! I am thankful. I would have been livid had I blown out a seal from my head work a year ago.
User avatar
kickin_it
Forum Member
Forum Member
 
Posts: 210
Joined: 27 Oct 2011, 06:52
Location: Franklin, Tennesse
Model and Year: 1998 S70 GLT

Next

Return to Volvo 850, S70, V70, C70 & V70-XC Forum (1992-2000)

Who is online

Users browsing this forum: Alexa [Bot], Google [Bot], Google Feedfetcher, ThommyKent and 64 guests