V8 Manifold Bolts

[RandomNerd2000]

So I have a question. I'm getting ready to finally do the manifold that's cracked on my 2000 after several years of listening to that racket. The bolts going into the heads I do plan on replacing with hardened standard fasteners, which I've got purchased and have had for years.

The bolts I'm curious about are the two going to the exhaust, do they make replacement kits for those? I know they do for the engines with studs coming off, but I'm looking for exhaust grade hardware Any leads? There generic kits? I was told the thread is M12 if that helps, but none of the hardware stores have anything but mild steel bolts.

 

[rasouth]

Are you talking about the two bolts that attach the manifold to the rest of the exhaust pipe, (two one each side, with springs), the exhaust flange? If so than there are replacements for those. Any auto parts store should have them.

 

[rasouth]

My mistake. You are talking about the bolts higher up, not the flange. I have seen those bolts you are talking about. Local auto parts store or online like Rockauto have them, too.

 

[fast_dave]

@RandomNerd2000

Try these guys - largest selection I've found of unusual metric bolts/nuts/fasteners.

BelMetric.Com

Metric Hardware, Metric Fasteners, Metric Bolts, Metric Nuts & Time-Sert Thread Repair


Hope that helps!

 

[Dono]

I lost over an hour of my life looking for the part number of the collector bolts.
Sorry, can't help. Hopefully someone else see's this and can find it.

 

[RandomNerd2000]

The flange bolts, I couldn't get the term to come to me last night for the life of me. On the driver's side I used grade 8 bolts that weren't all thread, run a nut all the way down the threads and then threaded the bolt "assembly" in, that works really well on that side but the frame is too close on the passenger side.

I did find a $9 bolt set on Amazon of all places but it's not all thread, but looks the part otherwise.

https://www.amazon.com/Hard-Find-Fa...JQ/?tag=bingshoppinga-20&linkCode=df0&hvadid=

 

[Turdle]

aren't they m13 x 110 mm ?

fastenal sells a internal hex head bolt that works, also, the torsion bar adjuster bolts will be the same threads--you might be able to get some from a junk yard. They would work in a pinch


edit. I went to my pile and dug one out. I am way off.

M12 x 55 ( longer will work, 55 mm is just over 2" )

oops

 

[RandomNerd2000]

m13? I was thinking m12 but it's been a minute since I bought anything like this. I hadn't thought of torsion bar bolts, that would work in a pinch. They're probably the same bolt or really close. My other plan is just go to the local Carquest and hand em an old one and see what they come up with. If it's to be hand they can get it. Anybody know if Ford offers these still? I'd think so being a metric thread bolt.

 

[Turdle]

m13? I was thinking m12 but it's been a minute since I bought anything like this. I hadn't thought of torsion bar bolts, that would work in a pinch. They're probably the same bolt or really close. My other plan is just go to the local Carquest and hand em an old one and see what they come up with. If it's to be hand they can get it. Anybody know if Ford offers these still? I'd think so being a metric thread bolt.

I edited my mistake above, sorry for that. My bad.

 

[RandomNerd2000]

I found some that are close but they're 12 point bolts. Something in me says bad plan on a 12 point bolt, even though that's what they use in driveshafts. I'm betting someone sells it, or something equally hard.

 

[410Fortune]

I would run the 12 point bolt no problem, more points = better torque from the socket

I have personally about had it with the v8 manifold to down pipe bolts. I would much rather run a stud setup or a through bolt and nut.

I usually have to use a torch to make sure the stock bolts will free up and come out, then you have to chase the threads on the manifolds otherwise they will stick/break the next time around

I like the later model v6 manifolds that have studs....

 

[RandomNerd2000]

I thought about a stud kit, I believe they share the threads with the Modular/Triton series engines, and the length is about right. The 12 points main complaint from me, since I do like the 12 point bolts generally speaking is I can't keep up with good sockets for anything, I generally buy a socket every time I need a 12 point quality socket. I do live down south so I have that going for me, the originals weren't stuck that bad, they came loose with the ratchet but look bad. My Mountaineer's look great, I'm holding my breath on them actually turning though or I'd go pull em. I use nuclear grade anti-seize, it's like $40 a can or was last I bought any, it's really good stuff too, I put it places you want no problems, like fan clutch nuts, anything to do with exhaust etc.

 

[RandomNerd2000]

So update, went around and nobody has bolts but the stud kit for both sides that the parts store calls for as an updated design was $8 and some change, that's what I went with. Was there a TSB for that? They said that's what is called for, bolts are not even though the trucks come with them stock.

Shouldn't ever need to come out if all goes well and part of me thinks I might prefer the studs if I do have it apart.

 

[Turdle]

I'm thinking you need bolts, as it is already tight on the passenger side inner bolt. Not sure you'd have room for a deep socket.

amazon has stainless bolts m12 x whatever length. You'd have them by now. Just sayin.