D2 Oil Leak
#1
D2 Oil Leak
I recently bought a new-to-me 2003 Monte Carlo blue Discovery that runs pretty well. I have sorted out several issues thus far (codes for evap and o2 sensors). I have driven it at least 500 miles since I purchased it a few weeks ago. It has been well cared for overall. It does have what appears to be a liner tick and occasionally a little bit of a rough idle when warm, but I have been working through things one at a time.
It had a minor oil leak from somewhere in the front of the engine and maybe a bit of seepage somewhere in the back. I wasn’t overly concerned however because it seemed quite minor. I changed the oil last weekend with a 10w-40 Castrol blend and added a bit of oil stop leak. Since then the oil leak has become much much worse. It now is leaking so much oil that it is smoking from oil burning on the exhaust and I can’t really drive it. Not sure how it could suddenly go from being a minor issue to such a massive leak so quickly except if a seal is starting to come apart completely.
Valve cover gaskets were recently completed by the prior owner and are clean. Valley pan has some build up from what I can see from the top, but doesn't seem to be gushing. Oil pan may be seeping, but mainly seems to show oil from elsewhere. I cannot really see the underneath the front of the engine well because it still has the plastic shield, but it seems like there is a lot of oil coming from up there. It seems to be from below the water pump. It’s been a while since I’ve dealt with a Rover V8 in a Disco - I am thinking front cover and/or crank pulley seals? Any other ideas?
It had a minor oil leak from somewhere in the front of the engine and maybe a bit of seepage somewhere in the back. I wasn’t overly concerned however because it seemed quite minor. I changed the oil last weekend with a 10w-40 Castrol blend and added a bit of oil stop leak. Since then the oil leak has become much much worse. It now is leaking so much oil that it is smoking from oil burning on the exhaust and I can’t really drive it. Not sure how it could suddenly go from being a minor issue to such a massive leak so quickly except if a seal is starting to come apart completely.
Valve cover gaskets were recently completed by the prior owner and are clean. Valley pan has some build up from what I can see from the top, but doesn't seem to be gushing. Oil pan may be seeping, but mainly seems to show oil from elsewhere. I cannot really see the underneath the front of the engine well because it still has the plastic shield, but it seems like there is a lot of oil coming from up there. It seems to be from below the water pump. It’s been a while since I’ve dealt with a Rover V8 in a Disco - I am thinking front cover and/or crank pulley seals? Any other ideas?
#2
#3
Has the PCV mod been done? The front seal can be replaced from the outside. The valley pan gasket can be blown out by excess pressure if the PCV mod has not been done and if it is blown out the PCV mod will not fix the leakage after the fact. I bought a truck once that had a completely plugged valve cover baffle and the valley gasket was blown. I immediately installed the PCV mod and drove it home 8 hrs, had to put two quarts of oil in every 60 miles.
#4
#5
Has the PCV mod been done? The front seal can be replaced from the outside. The valley pan gasket can be blown out by excess pressure if the PCV mod has not been done and if it is blown out the PCV mod will not fix the leakage after the fact. I bought a truck once that had a completely plugged valve cover baffle and the valley gasket was blown. I immediately installed the PCV mod and drove it home 8 hrs, had to put two quarts of oil in every 60 miles.
#6
#7
#8
The following users liked this post:
JohnZo (05-07-2022)
#9
#10
One the first things I did was change the oil filter. I was having some oil light at start issues, then I looked underneath and saw a cheap Fram oil filter. Got that replaced by a Mobil1 filter ASAP and the oil pressure light issue has gone away since.
The PCV definitely helped the leaks, the top of the engine appears to have stopped leaking altogether. However, I still am getting smoke from the cats, especially after I drive for 10+ minutes at 70 mph. At first I thought leaking oil was hitting the cats, but all the oil from the engine at the back seems to be dried up - I am pretty sure that was coming from the valley pan because of the PCV. But the valley pan seems to be a lot drier now.
Now I am wondering if maybe the cats are going bad. Floorboard gets really hot when interstate driving. Maybe the cats are gone and smoking?
It also has developed an idle misfire. Fine at all other times except when rolled up to a stoplight once warmed up. Thinking maybe that might be coils?
The PCV definitely helped the leaks, the top of the engine appears to have stopped leaking altogether. However, I still am getting smoke from the cats, especially after I drive for 10+ minutes at 70 mph. At first I thought leaking oil was hitting the cats, but all the oil from the engine at the back seems to be dried up - I am pretty sure that was coming from the valley pan because of the PCV. But the valley pan seems to be a lot drier now.
Now I am wondering if maybe the cats are going bad. Floorboard gets really hot when interstate driving. Maybe the cats are gone and smoking?
It also has developed an idle misfire. Fine at all other times except when rolled up to a stoplight once warmed up. Thinking maybe that might be coils?