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red351 wrote:
Springs are binding maybe?
Winner winner!
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Mite have a new set of ported 289 heads Friday to replace mine that I cracked installing the new ARP studs. Will know more Friday.
This car mite see the pavement yet.
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Cab4word67 wrote:
Mite have a new set of ported 289 heads Friday to replace mine that I cracked installing the new ARP studs. Will know more Friday.
This car mite see the pavement yet.
I hate to hear this and it needs more explaining..... how did you crack a head???
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Oh it wasn't hard to do with all the luck I have had on this engine rebuild. This was the icing on the cake for me. After braking 4 studs we discovered that I had spring bind going on in the new heads, so the shop was going to install off set valve keepers to solve the problem. They were going to due the install on the car. And my new ARP studs arrived the day before. I knew I needed to have studs to work on the valves so not knowing any diferent I installed a new ARP stud in the first hole and when I torqued it down it cracked the head. I was not aware you need to have a cut in the top for the stud to fit in. I was going to have my head welded, but he has a set already ported (not as much as mine were) that he will give me for all my troubles.
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What does "I was not aware you need to have a cut in the top for the stud to fit in." mean?
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I don't know the correct terminology but the stud is fat at the top like a flat head screw and needs the countersink cut into the head. Mine did not have this so when I tightened down it went in forcing the head to expand and crack. Just more of my dum luck on this rebuild.
Last edited by Cab4word67 (3/25/2021 9:44 AM)
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Cab4word67 wrote:
I don't know the correct terminology but the stud is fat at the top like a flat head screw and needs the countersink cut into the head. Mine did not have this so when I tightened down it went in forcing the head to expand and crack. Just more of my dum luck on this rebuild.
Was the head threaded? I thought stock was press in studs?
About the coil bind, again I am really questioning the people you had do the machine work. Yes, you've got some self inflicted pain, but it's not all your fault here!
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Short story is yes they are threaded, but had Pioneer studs witch did not have a shoulder to stop them from going in to far. Yes I know that the shop had an issue and they are taking care of all for me. But it still sucks.
The replacement heads they are giving me have been ported and gasket matched but the guy never paid for the work. And they feel this is a better route to go for me to get me back together. What I don't know is, wilI I be still breaking it in on the Bash trip or just breaking it.
Last edited by Cab4word67 (3/25/2021 3:08 PM)
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Cab4word67 wrote:
What I don't know is, wilI I be still breaking it in on the Bash trip or just breaking it.
Said everyone who drove their Mustang to a Bash.
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LOL likely very true Bob
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Sooooooooooo....the new(replacement) heads will have 60 thous. clearance in the springs?
Seems like 'offset-keepers' is just a crutch for a real problem (coil bind)
Not being ugly........just trying to comprehend.
6sal6
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No these heads are suppose to be correct already just needed to have my ARP studs installed. I am requesting the height of the springs also just to be sure.
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Looks like I will be installing a new cam now too. Picture one is from the first valves lifter that broke. Picture 2 is from the last one that broke. All the rest look much like the 2nd one. I looked at my old lifters and if you look real hard you can see the same pattern as # 2. This motor only has 60 miles on it. TOAST I think
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Cab4word67 wrote:
Looks like I will be installing a new cam now too. Picture one is from the first valves lifter that broke. Picture 2 is from the last one that broke. All the rest look much like the 2nd one. I looked at my old lifters and if you look real hard you can see the same pattern as # 2. This motor only has 60 miles on it. TOAST I think
Well keyrap! Flat tappet cams and binding springs don't live together very well. So sorry to read about all your troubles. The worst thing about replacing the cam on these little engines is pulling the front of the engine off and hoping that when you get it back together the oil pan is leak free in the front.
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Perhaps, it is time, with all the problems you've been having, to have a COMPETENT shop put the engine together for you. At least then, you would have a warranty if things continue to go sideways. Not saying your current shop isn't good, but........just saying...
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motor is out cam is toast. Pictures after dinner
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worst engine build I have ever done. So it makes since to do it twice. Motor is out and we are starting over. Monday I will go up to the shop to get my new heads and find out if they want to assemble it on there dime or come to my house and install the new cam bearings and I will assemble it again. Yes the cam bearings are toast too, cam was pushed down into them and there are ridges from center down on the bearings and was stuck in the motor. I didn't think I was going to get it out. At this time the shop owes me a cam, bearings, gaskets, oil, lifters, push rods. I don't trust the push rods now seeing the damaged done. Monday is along way from now. This sucks.
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You can get through this!
Tom Monroe's book is invaluable.........
Read and ask lotsa questions.....take your time and enjoy the journey
6sal6
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Thanks Sal, I cant wait to do this all over again. I just wish I had someone to talk to on a phone, because it sucks. The whole car went so smooth and all that was left was a little 289 under the hood. I cant even drive my bowtie because it is storing the hood. What a great way to start retirement
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Hang in there brother, and welcome to the club. Many of us have damaged motors that required rebuilding. The way I look at it is I'm blessed to have an early Mustang with which to have problems. Many a folk can't afford one car.
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At this point I'm assuming you are tearing the whole engine back down. There's been a lot of metal run through it. I would replace the oil pump and all bearings at a minimum. Everything else needs to be cleaned thoroughly. Scrub out all oil passages in the block, and thoroughly clean the oil pan. Any place metal flakes can hide they will. Inspect everything very closely. Check all tolerances again on reassembly.
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Yup, I would scrub that block well.
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Sometimes it's good to just walk away. Maybe cut your losses with that shop, take the heads and any NEW parts they want to give you and part ways. Then pull the motor and find a good shop, show them your parts collection and see what they can use and what has to be replaced. I know it's easy for me to spend your money, but my goodness you DON'T want to do this a 3rd time.
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Motor is out and I had to use a crowbar to remove the cam as it had been pushed down into the bearings so hard. The heads were the problem. I will know where I am with this Tuesday when the owner returns. I have opened up a rod cap and there mite be a couple tinny spots of metal. I opened up the oil pump and it looks the same as it did when I put it in. There was a small 1' long trace of metal in the pan and not enough to wipe off from the magnetic plug. There was much more on it after the break in. I have changed the oil twice so far in 50 miles and 45 of it is on the 2nd change. Bottom end looks really good?? The cam really doesn't look like it was ground up. Looks more like it was beat to death likely during the break in. 50 miles and 4 broken studs. The push rods look fine but the fulcrums in the rockers were toast too.
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6sally6 wrote:
"The point is............" whether you do the spin technique or the up & down technique it amounts to the SAME THANG!
Get all the slack/play out of the rocker/pushrod/lifter assembly then give it the 1/2 turn!
You are making sure there is NO slack in the adjustment BUTT no pre-load either! The 1/2 turn just pushes the top of the hydraulic lifter down approximately half way so it's NOT bottomed out BUTT it's not too loose either.
Both methods accomplish the same thang.
6sal6
I was thinking same thing, Sal.
Arguments over different methods to achieve the same thing. You just have to feel the zero lash point. When I do it, I note the pushrod movement diminishing until some resistance is felt in the pushrod’s rotation. It is definitely a very notable position and there is no variation. Once the pushrod gets to zero lash, just add 1/2 to 3/4 turn and move on. I guess I have done this so many times it is just second nature to find zero lash, then adjust. It is not hard to do!
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