DB9 Intake Manifold Removal
Discussion
So working my way in to replace plugs and coils. Just got my first manifold off tonight. Heard the back bolt was a bugger. Had to remove access panel by the wipers and then use a long extension with one of those knuckle adapters to get the proper angle.
When I pulled off the throttle body there was a pool of oil in the manifold behind it. What would cause this?
One last thing. One of the intak bolts was coated with some type of corrosion. Anything to worry about?
When I pulled off the throttle body there was a pool of oil in the manifold behind it. What would cause this?
One last thing. One of the intak bolts was coated with some type of corrosion. Anything to worry about?
Edited by old phart on Sunday 31st January 05:44
Thanks Organeer
I didn't disconnect the fuel rails. Just pushed to side. And as soon as I pulled the manifold I shoved towels in the intakes. Probably not 'doing it by the book' but am enjoying the process.
Yes the bolt with the corrosion was 2nd to the last. I think it is when I wash the car the water that gets through the vents on the bonnet collects.
I didn't disconnect the fuel rails. Just pushed to side. And as soon as I pulled the manifold I shoved towels in the intakes. Probably not 'doing it by the book' but am enjoying the process.
Yes the bolt with the corrosion was 2nd to the last. I think it is when I wash the car the water that gets through the vents on the bonnet collects.
There was enough slack that I could just hold them to one side to get the manifold out. Once the first is out there is a lot more room for pulling the second.
Wondering is there a way to test the coil packs? I'm afraid they'll all look fine visually.
I'm replacing them all but would feel better knowing which one was bad.
Wondering is there a way to test the coil packs? I'm afraid they'll all look fine visually.
I'm replacing them all but would feel better knowing which one was bad.
Edited by old phart on Monday 1st February 14:21
So pulled coils and plugs. From plugs #10 is the only one significantly different/darker than the others as far as coloring.
Looking for a way to test coils to confirm. With my ohm meter I only get a reading across pins 1 and 2 and it is within .1 ohm between all coils.
Any other measurements I can take? Would you agree on the plug coloring or is it insignificant? Really was hoping to see/measure something that would indicate the proper cylinder.
Will be replacing PVC valves as well.
Looking for a way to test coils to confirm. With my ohm meter I only get a reading across pins 1 and 2 and it is within .1 ohm between all coils.
Any other measurements I can take? Would you agree on the plug coloring or is it insignificant? Really was hoping to see/measure something that would indicate the proper cylinder.
Will be replacing PVC valves as well.
Done!
Replaced plugs and coils and put it all back together. What fun. When I fired it up there were 4 codes that popped up. One telling me it was cylinder 5. Good to know. So I've got 11 2009 DB9 3 pin coils if anyone is interested.
Anyway, I cleared the codes and took it out and did the 70mph to 20mph thing a few times but the codes kept coming back. My mirrors hadn't ever swung out to their service position and I got to thinking. Even though I had it on my official Aston trickle charger the whole time it might be a weak battery. I've read enough posts to know that the battery can cause all kinds of issues. I was still running on the original one so ran out and purchased a new one and Poof, all my issues went away. Only one left was a mass air flow fault and only because I had forgotten to plug it in.
I've had the car since February of last year and there must have always been a miss or something because it runs so smooooth now. No vibration of any kind.
When I first purchased the car and opened the hood I was awestruck with the manifolds and always thought they'd look awesome polished up.
Sooooooo
Replaced plugs and coils and put it all back together. What fun. When I fired it up there were 4 codes that popped up. One telling me it was cylinder 5. Good to know. So I've got 11 2009 DB9 3 pin coils if anyone is interested.
Anyway, I cleared the codes and took it out and did the 70mph to 20mph thing a few times but the codes kept coming back. My mirrors hadn't ever swung out to their service position and I got to thinking. Even though I had it on my official Aston trickle charger the whole time it might be a weak battery. I've read enough posts to know that the battery can cause all kinds of issues. I was still running on the original one so ran out and purchased a new one and Poof, all my issues went away. Only one left was a mass air flow fault and only because I had forgotten to plug it in.
I've had the car since February of last year and there must have always been a miss or something because it runs so smooooth now. No vibration of any kind.
When I first purchased the car and opened the hood I was awestruck with the manifolds and always thought they'd look awesome polished up.
Sooooooo
Only replaced plugs, coils, PCV's, and battery. All the codes are now gone so I assume any not directly related to the original misfire were battery related.
as to the oil in the intakes - I spoke with an Aston mechanic and he said not to worry too much about it. He said if you keep your oil topped off you actually increase it a bit. Said he's recommend not keeping oil level to the very top of the mark on the dip stick. Aim for the middle of the marker.
Here's a shot of my OBD reader I used. It connects to my phone via bluetooth.
Quick shout out to forum members in that I knew to reset my windows and seats after replacing the battery, and even to the fact about knowing a weak battery can cause false faults. Only hope I'm doing my part to contribute to the knowledge base.
as to the oil in the intakes - I spoke with an Aston mechanic and he said not to worry too much about it. He said if you keep your oil topped off you actually increase it a bit. Said he's recommend not keeping oil level to the very top of the mark on the dip stick. Aim for the middle of the marker.
Here's a shot of my OBD reader I used. It connects to my phone via bluetooth.
Quick shout out to forum members in that I knew to reset my windows and seats after replacing the battery, and even to the fact about knowing a weak battery can cause false faults. Only hope I'm doing my part to contribute to the knowledge base.
Edited by old phart on Sunday 3rd April 16:40
Edited by old phart on Sunday 3rd April 20:59
Hey Ken,
Hard not to take the bonnet off and drive around with it 'naked'. Without counting waiting for parts and such I'd say it would be an 8 beer project. Two weekends at a couple beers a day
Some of those bolts at the back are real buggers. Got my coils, gaskets and such from Scuderia Car Parts working with Kieran. Excellent service. And loved the updates as parts were gathered, boxed up and shipped. Got the plugs on Ebay. It was about $1300 US for everything related to the plugs and coils.
The manifolds were $500, a large pepperoni pizza and a 12 pack of Budweiser. I made an honest effort at doing it myself but after a couple weeks realized it wasn't going to happen. Found a local shop to do them. They had to strip them first as Aston has some kind of coating sprayed on. When I went to pick them up I had the pizza and beer in the car and told them I had a problem with room in the car to place the manifolds. They came out to help arrange things and thats when they helped move the pizza and beer out of the way
Nice bunch of guys. They're not getting rich but just like a lot of little shops they are really good at what they do. Love supporting the 'little guys'. They actually quoted me $400 when we first met but being the excellent negotiator I am I told him I had budgeted for $500 so let's go with that!
One thing I did learn is to shove towels all around as, with the bottom of the car sealed, anything dropped won't make it to the floor
Hard not to take the bonnet off and drive around with it 'naked'. Without counting waiting for parts and such I'd say it would be an 8 beer project. Two weekends at a couple beers a day
Some of those bolts at the back are real buggers. Got my coils, gaskets and such from Scuderia Car Parts working with Kieran. Excellent service. And loved the updates as parts were gathered, boxed up and shipped. Got the plugs on Ebay. It was about $1300 US for everything related to the plugs and coils.The manifolds were $500, a large pepperoni pizza and a 12 pack of Budweiser. I made an honest effort at doing it myself but after a couple weeks realized it wasn't going to happen. Found a local shop to do them. They had to strip them first as Aston has some kind of coating sprayed on. When I went to pick them up I had the pizza and beer in the car and told them I had a problem with room in the car to place the manifolds. They came out to help arrange things and thats when they helped move the pizza and beer out of the way
Nice bunch of guys. They're not getting rich but just like a lot of little shops they are really good at what they do. Love supporting the 'little guys'. They actually quoted me $400 when we first met but being the excellent negotiator I am I told him I had budgeted for $500 so let's go with that!
One thing I did learn is to shove towels all around as, with the bottom of the car sealed, anything dropped won't make it to the floor
Edited by old phart on Monday 4th April 02:14
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