Print

Please login or register.
1 Hour 1 Day 1 Week 1 Month Forever
Login with username, password and session length

[Tick Tock]

The weather has been cracking these last couple of days, so have managed to spend another 2 or 3 hours on the project. Camshafts are off the heads, and on the bench in order (along with top bearing halves), and this afternoon I managed to remove PS pump and get N/S head off.

All in all, it's looking good so far, so I suspect the original problem is on the O/S bank of cylinders. I wont be able to get that head off until I've removed the oil cooler pipes, and the rigid coolant pipe that enters the block at the rear of the engine.

I'll take some more pics when the sun's out, and post on here for those interested. I must admit I was beginning to feel a bit disheartened with all the bits and pieces I've had to remove, but now the engine block is starting to look like a pea on a drum in that vast space under the bonnet, and the job is going well so far..... definately not for the fainthearted!!!!

It may be a few days before I get everything cleaned up and start looking at the parts I'm going to need to put it all back together.... the 3.0 cam followers look like an atractive possibility, so on the look-out for some. 

[The Red Baron]

have a word with elite pete, im pretty sure he has a set of 3.0l cams knocking around.

[henryd]

The weather has been cracking these last couple of days, so have managed to spend another 2 or 3 hours on the project. Camshafts are off the heads, and on the bench in order (along with top bearing halves), and this afternoon I managed to remove PS pump and get N/S head off.

All in all, it's looking good so far, so I suspect the original problem is on the O/S bank of cylinders. I wont be able to get that head off until I've removed the oil cooler pipes, and the rigid coolant pipe that enters the block at the rear of the engine.

I'll take some more pics when the sun's out, and post on here for those interested. I must admit I was beginning to feel a bit disheartened with all the bits and pieces I've had to remove, but now the engine block is starting to look like a pea on a drum in that vast space under the bonnet, and the job is going well so far..... definately not for the fainthearted!!!!

It may be a few days before I get everything cleaned up and start looking at the parts I'm going to need to put it all back together.... the 3.0 cam followers look like an atractive possibility, so on the look-out for some. 

it isn't the followers you want,its the 3.0 camshafts

[mrgreen]

well done to you, it's the kind of project i love for us mere mortals it's a matter of marking everything as it comes off i always do this with tape and a number system! what comes off must go back on even though you have no idea what it does(well in my case anyway!) looking forward to more pics as you go along

[Tick Tock]

The weather has been cracking these last couple of days, so have managed to spend another 2 or 3 hours on the project. Camshafts are off the heads, and on the bench in order (along with top bearing halves), and this afternoon I managed to remove PS pump and get N/S head off.

All in all, it's looking good so far, so I suspect the original problem is on the O/S bank of cylinders. I wont be able to get that head off until I've removed the oil cooler pipes, and the rigid coolant pipe that enters the block at the rear of the engine.

I'll take some more pics when the sun's out, and post on here for those interested. I must admit I was beginning to feel a bit disheartened with all the bits and pieces I've had to remove, but now the engine block is starting to look like a pea on a drum in that vast space under the bonnet, and the job is going well so far..... definately not for the fainthearted!!!!

It may be a few days before I get everything cleaned up and start looking at the parts I'm going to need to put it all back together.... the 3.0 cam followers look like an atractive possibility, so on the look-out for some. 

it isn't the followers you want,its the 3.0 camshafts

Well that makes more sense regarding extra BHP..... I did wonder why just the followers would / wouldn't make any difference. So the next question is - tolerances regarding camshafts in a different head.

I've read so many times that it's critical to make sure the camshaft bearings retain their original positions on re-assembly, which makes sense from an engineering / matching point of view. Surely by fitting different camshafts would knock this theory out of the window?

[Tick Tock]

Having the N/S head on the bench and looking carefully at it, is there any reference (on here or in print) that shows the oil flow and lubrication of the camshaft bearings (and more importantly), the flow of oil back into the sump?

[Tick Tock]

Another pic - this time of the underside of the head & gasket, showing a good seal between the cylinders and the coolant chambers, with typical corrosion taking place in the 'less than critical' areas.



The inlet valves on pot 6 look to be a lot cleaner than on 2 & 4, anyone got any suggestions as to why?

It will be interesting to see what the other head reveals.

[Jimbob]

I dont, but whenever I see pics like these I realise how clean my old heads were!

http://www.omegaowners.com/forum/YaBB.pl?num=1258052938

reminder to self....put some decent fuel in 

[henryd]

The weather has been cracking these last couple of days, so have managed to spend another 2 or 3 hours on the project. Camshafts are off the heads, and on the bench in order (along with top bearing halves), and this afternoon I managed to remove PS pump and get N/S head off.

All in all, it's looking good so far, so I suspect the original problem is on the O/S bank of cylinders. I wont be able to get that head off until I've removed the oil cooler pipes, and the rigid coolant pipe that enters the block at the rear of the engine.

I'll take some more pics when the sun's out, and post on here for those interested. I must admit I was beginning to feel a bit disheartened with all the bits and pieces I've had to remove, but now the engine block is starting to look like a pea on a drum in that vast space under the bonnet, and the job is going well so far..... definately not for the fainthearted!!!!

It may be a few days before I get everything cleaned up and start looking at the parts I'm going to need to put it all back together.... the 3.0 cam followers look like an atractive possibility, so on the look-out for some. 

it isn't the followers you want,its the 3.0 camshafts

Well that makes more sense regarding extra BHP..... I did wonder why just the followers would / wouldn't make any difference. So the next question is - tolerances regarding camshafts in a different head.

I've read so many times that it's critical to make sure the camshaft bearings retain their original positions on re-assembly, which makes sense from an engineering / matching point of view. Surely by fitting different camshafts would knock this theory out of the window?

the 3.0 camshafts have the same size bearing journals,just fit the four 3.0 cams but use your existing bearing caps in there original positions,both engines are timed the same so a straight forward rebuild

[Tick Tock]

Thanks for the info on camshafts, all makes sense now 

There's quite a noticable difference between the condition of the heads using injector cleaner and better quality fuel, and no doubt better performance to boot.

[BlueBridge]

How is the rebuild going?

[Tick Tock]

Things are progressing slowly at the moment, as the weather has turned a bit colder outside and it's been raining on and off the last few days..... Thanks for asking 


Here's a pic of the heads and cams etc, all awaiting cleaning and refurbishing - that should keep me busy in the workshop for a while!


Another pic showing the N/S cam cover. It looks like oil has been seeping out of a crack - presumed damaged a while ago, and no doubt contributing to the plumes of smoke that would appear from under the bonnet after being worked hard. I'll be on the lookout for a replacement, and the mating face looks a bit too wavy for my liking, so anyone dismantling a V6 2.5 engine please let me know.


An interesting picture showing the difference between the O/S and N/S exhaust manifolds and sheilds. Despite the oil stained and burnt N/S, the car wasn't using much oil - maybe an egg cup full every 500 miles. Hardly any smoke when stopped, if car was being driven with economy in mind. I knew the cam cover gaskets needed to be done, so good job the head problem came along before I'd done the job.

[sotmh]

Well done on persevering.  You will definitely feel a great deal of self satisfaction once its completed. 8-)

[Miggylover]

nice little write up this, look forward to seeing the end result