greasy/dirty engine - is this a blown head gasket?

Joined
15 February 2007
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411
Location
Leawood, KS
While doing the timing belt I thought I'd look into where some of my leaks are coming from. I've purchased cam seals and plugs. I've now taken the front cams off and found more info.

For one, the front exhaust cam plug was covered in grease. Its seat is the least clean/most cruddy. It was cruddy with a little glue-looking gunk while the others looked to be bare metal. Both cam seals looked fine.

But, the engine is much more oily/dirty on the passenger side (cam gear/seal side). Immediately it is obvious that the crank/cylinder sensor has had some "changes". This thing looks to have melted and oozed think black glue or lacquer of some sort. The heavy black stream made its way to the oil pan and below. Does this sensor need to be replaced? It must still be working, no? Won't a new one just leak again? Any long term strategy for crank/cylinder sensor?

While looking at the passenger side of the engine, I saw more and more oily dirty areas that can't be seen when the timing belt covers are on. One of the oiliest/dirtiest spots is where the front head connects to the block. Two pictures are attached, one with flash, one without. This is looking at the front head, from the passenger side, with cams and inside belt cover removed.

Does this indicate a blown head gasket?

I also got under the car with my drop light and mirror-on-a-stick and tried to see if any where else the head gasket looks blown. It is hard to see up the front side of the engine with aftermarket headers that do a great job of blocking the view. From what I can tell, it is all dry from the bottom view and towards the driver's side. When I put on the headers last summer, it was dry and the leaking has been going on for years. If it is blown, it is right here, in that corner, as far as I can tell.

The oil/grease is on the rear passenger side of the engine as well. All around the oil pan (passenger side) is pretty thick with oily crud. But, I can see around the header and to the driver's side and no leaks. But, I can't really see well directly on the passenger side where the heat meets the block. I haven't yet taken the interior engine cover off on that side.

With my mirror and finger wipes, it seems that the valve covers have not leaked much, except maybe near the front exhaust cam plug. I can't detect any valve cover leaks on either valve cover.

Knowing that the car doesn't burn or leak enough oil to need any added between changes, nor does it have any other problems I'm aware of, could this still be a head gasket problem? Would a head gasket problem between the head and block leak oil or coolant? This is clearly oil.
 

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Oil leaks, tell me about it...it has cost me many sleepless nights and very much euro's. Mine was a 91 with 120k on it. At the stoplicht a lot of smoke came from under the hood. The first thing i had replaced were the valve seals then the valve head gasgets then the cam seals etc.. the oil got less but there was always a bit somewhere. at the end i replaced the head gasget and that was expensive and still the engine was not dry. All i can say is get a proffesional and good luck.
 
The first thing that I would do is clean all of the old oil residue off of the outside of the engine. Rubber gloves, brake parts cleaner and a tooth brush. Then I would run the car for about 30 miles and then get under it and see where the oil is coming from. A lot of the residue could have been there a long time, just not cleaned off when a gasket or seal was replaced. A lot of mechanics replace seals and gaskets that are causing oil leaks but they don't clean up the mess that the oil leak caused. Some owners don't want to pay for the outside of their engine to be spotless.

Don't start replacing seals and gaskets till you know for sure it is leaking. Sometimes the oil pan gasket just needs to be sinched up a little bit to stop any oil leaks, but not too tight.

Brad
 
If it's not losing coolant, you probably don't have a headgasket problem. You can do a compression or leakdown test to give you some additional peace of mind.

I had similar concerns when I bought my car at nearly 90K miles. The engine was just dirty.. cleaned it up and it looks ok.

Do the post above before you start replacing stuff.
 
Don't start replacing seals and gaskets till you know for sure it is leaking. Sometimes the oil pan gasket just needs to be sinched up a little bit to stop any oil leaks, but not too tight.

You don't need to see the oil level getting lower if your engine is soaked with oil like a donot. :)

Don't fix on the head gasket too soon as changing them is a PITA. Clean the engine and let it run until you see the leaks. Actually it's very hard to see any leaks in your pictures.
 
You don't need to see the oil level getting lower if your engine is soaked with oil like a donot. :)

Don't fix on the head gasket too soon as changing them is a PITA. Clean the engine and let it run until you see the leaks. Actually it's very hard to see any leaks in your pictures.

You can't see the leak, but you can sure see how dirty it is.

I'll go ahead and clean it as I put it back together, then I'll see where it leads.
 
put in a dye.

then run the car and hit it with UV light.

that way even if the engine is dirty, you can see where its is leaking from.

no wasted time in cleaning off the engine or guess.

warmest regards

Rob:smile:
 
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