One of these is not like the others

[Dishtowel]

booooooo to re-useing head bolts. Just get new ones when you do a rebuild.

 

[kevinsranger]

booooooo to re-useing head bolts. Just get new ones when you do a rebuild.

what did you do to be able to pull the bolt out using the torqx bit?

 

[BlackBII]

booooooo to re-useing head bolts. Just get new ones when you do a rebuild.

what did you do to be able to pull the bolt out using the torqx bit?

I'm also curious..

 

[Dishtowel]

It broke when I was torqing them up and I somehow missed it. It came out easy-smeasy, the problem was getting a-hold of it. It broke right at the level of the block, so I couldn't grab it with vice-grips or anything, and when I tried to drill it, it just spun deeper into the block. I was able to drill a tiny hole and hammer the torqx in, it came out by hand once I could hold onto it.

The head gasket was in bad enough shape that when I throttled up combustion pressure blew out the side and brought coolant with it and sprayed on the exhaust, making a white cloud a steam coming off my passenger exhaust manifold. That was a major clue, lol.

 

[almostclueless]

You actually reuse head bolts (TTY or not)?

 

[Dishtowel]

You actually reuse head bolts (TTY or not)?

Yes, I was building a smogger (mild) engine, and I didn't know any better. Thus I'm sharing my $300 lesson. Don't reuse head bolts kids.

What is "TTY"?

 

[rangerslim]

glad it wasn't too serious......lessons learned.......I learned my lesson years ago when I built my first 2.9......if it takes a few more days to do it right, then do it right the first time......

 

[Earl43P]

TTY = Torque to Yield, also called stretch bolts.

 

[Psychopete]

You actually reuse head bolts (TTY or not)?

You technically can on some, like a 351M, but his is definitely TTY. I usually opt. to replace them regardless for good measure.

That head gasket really bit it! Sucks to hear, I know you just rebuilt that engine not too long ago.

I just installed my GT40 heads on my 5.0L last night (and a couple other things), and I definitely used new head bolts. I bought ARP bolts with the stepping washers since my heads were drilled to 1/2" to be on a 351W.

Heads were re-done here locally since they were bought used. My block was gone though/cleaned/bored&honed/magged, crank turned/magged, rods reconditioned w/ ARP bolts, and it's balanced w/ forged pistons.

I am moving too slow on the build though. I had my 2.9L back together and almost running in 2 days, but I had to get it the F out of where it was quick.

Pete

 

[Dishtowel]

TTY = Torque to Yield, also called stretch bolts.

I brought them up to half way, then torqued them to spec', and double checked for good measure. I don't know what their yield is, I have the ford published manual for the car the engine/trans came from, I just went by the spec in there.

That head gasket really bit it! Sucks to hear, I know you just rebuilt that engine not too long ago.

I just installed my GT40 heads on my 5.0L last night (and a couple other things), and I definitely used new head bolts. I bought ARP bolts with the stepping washers since my heads were drilled to 1/2" to be on a 351W.

Yes, I just did a poor mans rebuild on the engine and trans this last winter. This engine is just at the end of being broke in, lol. I know where there is some Gt40 heads. Would I benifit from them at all with my speed density Fuel injection or would that just be pissing in the wind?

 

[LearjetMinako]

Ya, I'm not the only one to use torq's for something else than what they are suppose to be used for. Everytime I get someone's stripped out tuner lock lug nuts, I take a similar size torq and hammer that in.

As for re-using head bolts. At least you got practice in doing a head gasket.

 

[Will]

You know it's torque to yield when it says to pull them to 60ft# and then turn them another 90 degrees or something.

I've speculated why they switched to this. Anyone know? My guess is that with higher cylinder pressures--more torque with less cubes in modern engines--the bolts and gaskets are more highly loaded and need more accurate clamping. With the engineers not knowing the conditions under which an individual may torque a bolt, the actual clamping could vary a lot. One guy didn't chase the threads and didn't lube so his 100ft# isn't as tight as the guy that did chase the threads and also lubed. The actual spec called for chased threads and dry--or whatever. I think a low initial torque of like 60ft# will be about the same stretch with any variance and then the angle measurement will bring all of them to the same stretch. That's just my guess.

 

[Bent Bolt]

You know it's torque to yield when it says to pull them to 60ft# and then turn them another 90 degrees or something.

I've speculated why they switched to this. Anyone know?

I was told that TTY bolts gave a better clamping force. All I really know is that A LOT of Ford bolts are going that way and it's a major PITA. They are also going with specially coated ( lock tight or anti-seize ) nuts and bolts that are one time use only.

 

[kevinsranger]

I know where there is some Gt40 heads. Would I benifit from them at all with my speed density Fuel injection or would that just be pissing in the wind?

are you planning on running an aftermarket cam? i know if you try to use a b303 com from ford you have to convert to mass air or the engine will barely run. but i think just gt40 heads will be ok but i dont think you will see as much as an improvement with speed density.

 

[Psychopete]

I wouldn't think just the heads alone would mess with the PCM, but since there's really nothing else to go with it to justify the higher flowing heads, it probably wouldn't be worth the money you'd put into it.

I had E6SE heads on my '87 motor, and that was the first thing to go. I ended up picking up a set of used GT40 heads w/ 1.6:1 crane roller rockers and honey comb valve springs for $350. Eventually I am going to upgrade to 1.7:1 rocker ratio, and I am running a Ford Racing B303 cam as well.

The 350 was just for the heads though, I still took them in to be checked and reworked, but I am not certain how much they cost in the long run. I might look into that..

Pete