bluezero000 Posted June 7, 2015 Report Share Posted June 7, 2015 Experts, my 2004 S80 is leaking oil from the front (timing belt side). I'd like to clean up and see where it's leaking. How do I can the side timing-belt cover off? Anything to look other than the engine seal? Thanks. Link to comment Share on other sites More sharing options...
daverx1 Posted June 7, 2015 Report Share Posted June 7, 2015 PCV or front main seal... I had both on my S70. Neither one was a big deal. Link to comment Share on other sites More sharing options...
bluezero000 Posted June 8, 2015 Author Report Share Posted June 8, 2015 I've got PCV fixed to have negative crank case pressure. Positive crank case pressure was probably what got the leak started. Any tip for taking the timing belt cover off? The top part is easy but I can't see how the side cover is screwed/clipped on. Link to comment Share on other sites More sharing options...
Fran9690 Posted June 8, 2015 Report Share Posted June 8, 2015 Top of the cover is just the two T30 torx screws. The front plastic cover is held in by a 10mm bolt. It is about level with the coolant/power steering reservoirs. Pop them up off where they mount to the strut tower and you can get a 10mm socket and ratchet in there to remove them. Probably don't even need to disturb the reservoirs, but it gives you a bit more room. Then once the bolt is out, the cover has 4 plastic tabs that clip it to the cover bolted on the engine block. Just pull it away from the engine and the tabs pop off then you can lift it up and out as the bottom of the cover slides into slots on the bottom to secure it around the crank area. Common problem on the P2 is cam seals leak caused by a clogged PCV. I agree with you that the clogged PCV more than likely started the leak. Now that you have the breather system squared away, you can rest assured the leak will not return once you perform the repairs. Link to comment Share on other sites More sharing options...
Whisenhunter Posted June 12, 2015 Report Share Posted June 12, 2015 I had the same issue with my 2001 S60 T5, positive PCV pressure is what caused the leak.You'll want to check your cams seals and front main seal. I replaced all of the front seals as both the intake and crank were leaking. Link to comment Share on other sites More sharing options...
bluezero000 Posted June 14, 2015 Author Report Share Posted June 14, 2015 I took the timing belt cover off and saw oil on the top of the engine. I cleaned it up and started the engine. However, I don't see oil being sprayed on the top, at least not at idle. Was the oil brought up by the timing belt? Does it indicate where it's leaking? Thanks. Link to comment Share on other sites More sharing options...
Fran9690 Posted June 15, 2015 Report Share Posted June 15, 2015 Did you look on the back side of the cam sprockets? Usually they are wet back there, indicating failed cam seals. If it is cam seals, you might want to consider replacing the hubs. They get a groove in it where the seal rides, and eventually leak again. I've also seen that the hubs leak from the o-ring where it slides over the cam or where the two halves are riveted together. Link to comment Share on other sites More sharing options...
Whisenhunter Posted June 16, 2015 Report Share Posted June 16, 2015 +1 on the back of the cam sprockets, that's how I knew my intake cam seal was leaking.Pull your coil packs and check for oil around the plugs, if there is oil present you'll need to reseal your timing cover. I had this issue with my car leaking oil in to the spark plug tubes. It's not too big of a pain to reseal the valve cover, just a lot of time and details. Link to comment Share on other sites More sharing options...
Fran9690 Posted June 16, 2015 Report Share Posted June 16, 2015 If there is oil in the spark plug tubes, I would check to make sure the clamp for the upper breather hose is tight and that the oil cap seal is in good condition and not leaking before you go crazy and reseal the cam cover. I've seen both those leak and make it seem like the cam cover is the source, but it never has been in my experience. Link to comment Share on other sites More sharing options...
bluezero000 Posted June 16, 2015 Author Report Share Posted June 16, 2015 By "top of the engine," I mean only under the timing belt cover. There's no oil near oil cap or plugs. Link to comment Share on other sites More sharing options...
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