Just inherited a 99 V70XC. I have replaced the flame trap,cleaned the tubes, oil cap seal and all new elbows about 6 months ago.The previous owners had the timing belt replaced at a national muffler chain (don't ask me why) with variable cam codes after install. There is a large amount of oil on top of cylinder head.My question is, because of the variable cam off spec, is that enough to increase the crankcase pressure to leak from the cylinder head bolts or damage the upper head sealing? Vehicle has 187k.

 

I doubt that caused the leak.
Is it concentrated more in one area?

 

All over the top,running down the side, has not hit the belt yet. Previous owners said it leaked about 2qts p/3000 miles.

 

I would clean it all up really good and take it for a short drive and see where it is coming from.

 

Sorry on the info imput.I have done just what you instructed. I noticed oil moisture all over the top after 75 miles.Seems to generate from the all the bolts, no specific point of origin.

 

I would get a torque wrench and double check all the bolts.
Usually oil will not come from the bolts but have seen it a few times.

 

Thanks Tec, I will do as advised.If results are not achieved,can I reseal the top half without removing the cylinder head assembly?

 

You have to remove the cam cover to reseal. You will need a special sealer and 5 o-rings to reseal it.

 

Thanks again Tec, I will re-torque and cross my fingers.