Hello folks,
I'm new to this forum, and I was hoping I can get some insight from rest of you LR folks regarding my problem.

About 8 months ago I bought a 2002 Land Rover Discovery II with 86k miles and "apparently" blown head gasket. I decide to do the work myself as I have done the same kind of work on my Audi in the past.

So, I replaced the head gaskets, water pump, t-stat, all belts, tensioners, I also purchased a set of rebuilt heads on ebay, put in new spark plugs ( Bosch) Ignition Wires ( Sti) and all new bolts ( manifold + heads) and when i put the engine back together, and started it up, the check engine light started flashing and I noticed right away that the engine was idling rough. I plugged in the OBD scanner which showed several codes among them Cylinder 7 misfire, and at some point the engine even started overheating..

I tried everything in my power to try to figure out why is this happening, but I couldn't come up with any solid answers. The oil in the engine looks clean without coolant present in it. The other thing I noticed is that when I open the valve cover Oil cap, there seems to be some pressure build up in the valve cover.

I've heard stories about dropped sleeves and I was wondering if maybe that's the problem with my engine as well. I'm at the point where I put a lot of time and money into this car, and I just don't want to keep investing money in it if the engine block is bad.

I guess the most important thing is to figure out if I have a bad sleeve, and if not, what's causing the misfire.
I would greatly appreciate any additional insight into the matter.

Regards,

SV

 

What are the other engine codes? An intake air leak could cause misfire. When I did my head gasket, I accidentally swapped the plug wires for cylinders 6 and 7 at the coil (they're right next to each other and actually cross over from LH to RH side) so you might check that.

 

So did it run like this before you did the work?

 

Yup,
I already checked my wires and they're all OK. I used new Bosch spark plugs as well.

 

When I got it, the head gasket was blown, so It ran like crap. I started working on it right away and pretty much replaced the following:
1. New head gaskets
2. New cylinder heads
3. New Water pump and T-stat
4. New bolts for manifolds and heads
5. New air filters
6. New spark plugs and plug wires

So, here's what else I thought about replacing but never did:

- ignition coils
- 02 sensors
- catalytic converters

I think either of those could cause misfire.

 

If you want some help give us all the code numbers.

 

ignition coils are a possiblity

 

We should all quit guessing till he decides to send us the current fault code numbers, otherwise we are all just guessing.

 

excuse me, but i did not tell him to replace his coil pacs, i told him it was a possiblity.
and it is.

 

OK,
I finally found some time to pull the codes and they are plenty:

P0102 - MAF 02 or VAF low input
P0307 - Cylinder 7 misfire detected
P1884 - Manufacturer Control Transmission
P1590 - Manf. Control Vehicle Speed, Idle Speed Control Aux inputs.

I checked the pressure on cylinder 7 and it was about 40 LBS? The car only ran for about 3 minutes before I checked it. When i pulled the spark plug out, the center of it (the tip) looked kind of black.

I'm thinking about pulling the Bosch plugs out and going with the OEM product, which I think is Champion plug.