Progress Thread Diagnosis front end clunk (and more)
- Thread starter JD1964
- Start date
I understand , just so you know TFS twisted wedge heads work with the stock pistons to but that’s not the convo here. Especially with a stock cam.
I had those same rockers years ago they are the same as 93 cobra rockers.
All the shims end up realistically doing is making up for pushrod length. If they were right length the pre load would come in correct with no shim.
Either way , can’t wait to see it all buttoned up and running good for you again !
Heads are on and torqued. Headers on. Valve train on with .020 shims in each position getting 5/8 to 3/4 turn to cinched in all positions. Next I’m going to put the exhaust and o2’s back on underneath and then to water pump.
So thread sealer on those four is a must, is that correct?
I’m waiting on a 5/16 extended reach tap to chase the threads before I continue. Should be here tomorrow
If you are going to tap the threads going into the water jacket be sure to use some grease on the tap. Clean the grease and debris off after each use so that crap doesn't end up in the cooling system.
Got the intake torqued on today
The extended tap for water pump holes is late getting here but that’s next
The extended tap for water pump holes is late getting here but that’s next
I probed the bolt holes and for the life of me I couldnt confirm that they break through into the water jacket. I also searched the web and watched multiple videos and saw none where thread sealer was used on the bolt threads. I then found this from out old friend. So just to clarify, it looks like thread sealer is not needed on the bolt threads but anti seize is highly recommended on all of them.
Im planning on retorque the head studs after the first heat cycle.
Incidentally, I forgot to use anti seize on the intake manifold bolts when I put them in. So, when I remove the upper to retorque the head studs, my plan is to remove the intake bolts in sequence one at a time and apply anti seize and then retorque. Do you see any potential problems with this plan?
Thanks, John
Incidentally, I forgot to use anti seize on the intake manifold bolts when I put them in. So, when I remove the upper to retorque the head studs, my plan is to remove the intake bolts in sequence one at a time and apply anti seize and then retorque. Do you see any potential problems with this plan?
Thanks, John
DadLife0724
Active Member
I would loosen all bolts before pulling one out completely. Maybe I'm over thinking it, but pulling one completely out while others around it are still torqued screams sketchy in my head. Better safe than sorry.
You are overthinking it. What concerns me more is using a lubricant (anti-seize) on the bolts. If you set your torque wrench to the same value it will over torque the bolts and possibly pull the aluminum threads on the AFR heads. I have posted this in a few threads and I will here as well. You need to toss the bolts and move to studs on the lower intake. With bolts you are exerting two forces on the threads which are torsion and tension. With studs you are only exerting tension which is less of a load on the threads when torquing.
I ended up installing helical inserts on my AFR and Edelbrock aluminum heads as I got the Edelbrocks used and a couple of the threads were mostly pulled. The AFR's I just did for good measure the last time I build the motor.
Of course ARP makes a set and they are ARP pricey. Speedmaster also makes a set and they are a little less than half of what ARP wants and in this case I would not hesitate to run them. Rotating assembly and cylinder heads are a different story but being you are torquing to about 18 ft-lbs on an aluminum intake it does not take a super high quality steel for this.
www.speedmaster79.com
I ended up installing helical inserts on my AFR and Edelbrock aluminum heads as I got the Edelbrocks used and a couple of the threads were mostly pulled. The AFR's I just did for good measure the last time I build the motor.
Of course ARP makes a set and they are ARP pricey. Speedmaster also makes a set and they are a little less than half of what ARP wants and in this case I would not hesitate to run them. Rotating assembly and cylinder heads are a different story but being you are torquing to about 18 ft-lbs on an aluminum intake it does not take a super high quality steel for this.
Ford SB 289 302 351 Windsor 12 Point Black Oxide Intake Manifold Stud Kit
OverviewSpeedmaster black-oxide coated chromoly intake manifold bolts are rated at 170,000 psi. They're precision-machined for optimum thread engagement and have a wide-area flange for better load distribution. They also feature precision-rolled threads, which prevent galling, while promoting...
www.speedmaster79.com
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