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3.0L Starter Motor
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- Lifer
- Posts: 3438
- Joined: Tue Sep 29, 2020 10:37 pm
- Location: North Hampshire
3.0L Starter Motor
You don’t need to replace bolts on the manifold. 1 screw (on the left) and 6 nuts. Tightening torque is 15Nm for all. It is recommended you replace all the seals though.
2003 Maldives Blue 3.0i auto
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
- chanlon1
- Member
- Posts: 468
- Joined: Mon Jan 02, 2023 11:36 pm
- Location: Belfast
3.0L Starter Motor
You sure? I've the silver top engine in case it's different.
When I look at the manifold I can see 4 bolt heads and 3 nuts. I'm assuming that the bolts will need replacing as they are aluminium.
E86 Z4 Coupe 2006 Silver
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- Lifer
- Posts: 3438
- Joined: Tue Sep 29, 2020 10:37 pm
- Location: North Hampshire
3.0L Starter Motor
According to newTIS it’s a screw and 6 nuts for the 3.0Si E86, doesn’t differentiate between silver top and black top. The only bolts that need replacing as far as I know are the ones that go into the block (‘cos it’s a magnesium alloy on the N52); manifold is attached to the head.
2003 Maldives Blue 3.0i auto
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
Previously: Maldives Blue 2.5i manual (its back!) and another, and a Monaco Blue 3.0Si coupe
- Z4Mariner
- Member
- Posts: 177
- Joined: Tue Jan 11, 2022 6:40 pm
3.0L Starter Motor
Hi Chalon1 - I have a 'Silver Top' N52 as well. Our valve cover (VC) bolts are aluminum because the VC is magnesium. The head is aluminum alloy, unlike the aluminum-magnesium block, and AFIK the intake manifold hardware is steel and can be reused. I'm preparing to do this job myself in the next month or so.
Almost on topic, I found an interesting technical sales brochure online from Arnold Fastening Systems, manufacturers of aluminum fasteners (AL9). The link is here: https://www.arnold-fastening.com/filead ... ast-EN.pdf
I found it searching for torque specs on AL9 bolts used to secure the serpentine belt tensioner in a 2017 Golf I was working on for my son-in-law. Arnold's brochure gives the M8 AL9 bolts a torque spec target of 11.7 Nm. Their data show that AL9 fasteners give more stable clamping forces than steel fasteners when joining alloy parts under thermal cycling. Interestingly, they even claim their aluminum fasteners can give good results in removal and reassembly - of course, you would have to be sure the previous mechanic hadn't over-torqued and ruined the fastener . . .
Almost on topic, I found an interesting technical sales brochure online from Arnold Fastening Systems, manufacturers of aluminum fasteners (AL9). The link is here: https://www.arnold-fastening.com/filead ... ast-EN.pdf
I found it searching for torque specs on AL9 bolts used to secure the serpentine belt tensioner in a 2017 Golf I was working on for my son-in-law. Arnold's brochure gives the M8 AL9 bolts a torque spec target of 11.7 Nm. Their data show that AL9 fasteners give more stable clamping forces than steel fasteners when joining alloy parts under thermal cycling. Interestingly, they even claim their aluminum fasteners can give good results in removal and reassembly - of course, you would have to be sure the previous mechanic hadn't over-torqued and ruined the fastener . . .
Z4Mariner
Minnesota, USA
2006 Z4 Coupe 3.0Si, Montego Blue, MT
Minnesota, USA
2006 Z4 Coupe 3.0Si, Montego Blue, MT
- chanlon1
- Member
- Posts: 468
- Joined: Mon Jan 02, 2023 11:36 pm
- Location: Belfast
3.0L Starter Motor
Thanks.Z4Mariner wrote: ↑Sun Apr 07, 2024 3:41 am Hi Chalon1 - I have a 'Silver Top' N52 as well. Our valve cover (VC) bolts are aluminum because the VC is magnesium. The head is aluminum alloy, unlike the aluminum-magnesium block, and AFIK the intake manifold hardware is steel and can be reused. I'm preparing to do this job myself in the next month or so.
Almost on topic, I found an interesting technical sales brochure online from Arnold Fastening Systems, manufacturers of aluminum fasteners (AL9). The link is here: https://www.arnold-fastening.com/filead ... ast-EN.pdf
Extremely geeky Sunday morning reading
E86 Z4 Coupe 2006 Silver