427 SBF

[Steve439]

I should've mentioned this before but didn't think of it...

I can't remember if Mark's 155 number was a minimum or recommended.
As long as you're shimming, I would shim as much as you can within coil bind and retainer/guide clearance to get to that 155 or more.
There's nothing magic about the installed height spec that comes with a spring, it's just a number they pick to tell you about the spring.

 

[89 Fox 427]

Dam. Looked to be a nice thick flange. It's not bulged between the two bolts is it?
Was that with a thin layer of silicone ?

Not bulged. Part of the issue is the timing cover. The alignment dowels wouldn't get the timing cover flush with the rails on the block. Figured no big deal that pan gasket would cover it.

Stacked tolerances at play. I only smeared silicone in that area. It needs a fucking bead of silicone. And probably a vacuum pump to be safe from blowing it out down the road

 

[89 Fox 427]

The shop would charge me $75 to go through the springs and tell me what the reading is at 1.800.

That's if I just bring them bare ass springs

 

[BOSS#1540]

The shop would charge me $75 to go through the springs and tell me what the reading is at 1.800.

That's if I just bring them bare ass springs

If you do, take the retainers also.

 

[BOSS#1540]

Not bulged. Part of the issue is the timing cover. The alignment dowels wouldn't get the timing cover flush with the rails on the block. Figured no big deal that pan gasket would cover it.

Stacked tolerances at play. I only smeared silicone in that area. It needs a fucking bead of silicone. And probably a vacuum pump to be safe from blowing it out down the road

So is the seal for the balancer lining up ok ?

 

[89 Fox 427]

So is the seal for the balancer lining up ok ?

That is how I lined up the timing cover. Dowels had some play, so I left it loose as I pushed balancer on. Once it looked centered I torqued timing cover and water pump

 

[Steve439]

You can get one of those Proform mini testers pretty cheap.

I bought the one with the length measuring part and it's pretty accurate.
It's actually more accurate than the fairly expensive LSM I've owned for years.
The guts are probably the same in the one without the measuring part.

 

[Badd_Dadd]

Use TA-31, that pan will never leak.

 

[89 Fox 427]

Use TA-31, that pan will never leak.

I'm about to use er70s6

 

[89 Fox 427]

I'm having an issue getting one of the springs off. Keepers are stuck and the air in the cylinder isn't strong enough to keep valve from opening. Any other option with heads on to get the fucker apart?

Can I put the thing at TDC, let the valve make contact with piston and keep compressing until they release, pull valve up with fingers, move to bdc and add the air pressure and continue on?

 

[Steve439]

You can feed nylon rope or whatever through the spark plug hole and carefully bring the piston up.
I've never had to do that, but you can google it and see how it's done.

 

[Patriot Racer]

With all the BS you are doing, just take the heads back off. You can get practice torquing them back down.

 

[Badd_Dadd]

I'm having an issue getting one of the springs off. Keepers are stuck and the air in the cylinder isn't strong enough to keep valve from opening. Any other option with heads on to get the fucker apart?

Can I put the thing at TDC, let the valve make contact with piston and keep compressing until they release, pull valve up with fingers, move to bdc and add the air pressure and continue on?

Increase air pressure

 

[Boosted Bullet]

The air will probably push the piston down and fuck you when your at TDC, just a heads up.

 

[CompNut]

I'm having an issue getting one of the springs off. Keepers are stuck and the air in the cylinder isn't strong enough to keep valve from opening. Any other option with heads on to get the fucker apart?

Can I put the thing at TDC, let the valve make contact with piston and keep compressing until they release, pull valve up with fingers, move to bdc and add the air pressure and continue on?

Good way to bend a valve. It doesn't take much.

 

[89 Fox 427]

Good way to bend a valve. It doesn't take much.

Maybe dumb question.. but if using a compressor tool off the head, doesn't it hold the valve on one side while compressing the other side?

Isn't that just about the same thing?

 

[ResurrectionJoe]

Sometimes a light tap with a brass hammer/punch on the retainer will help break the wedge effect.

 

[ResurrectionJoe]

Maybe dumb question.. but if using a compressor tool off the head, doesn't it hold the valve on one side while compressing the other side?

Isn't that just about the same thing?

An off head compressor supports the entire valve face which is held against the seat so nothing can bend.

What you mentioned has the valve off the seat and only a portion of one side of the valve will contact the pocket in the piston causing a bending motion of the valve stem.

Please don't do that!!!

 

[CompNut]

No.

Maybe dumb question.. but if using a compressor tool off the head, doesn't it hold the valve on one side while compressing the other side?

Isn't that just about the same thing?

What Joe said!

 

[89 Fox 427]

Sometimes a light tap with a brass hammer/punch on the retainer will help break the wedge effect.

I tried. Almost seemed to bury them deeper in the retainer when the spring pops back up