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-   911 Engine Rebuilding Forum (http://forums.pelicanparts.com/911-engine-rebuilding-forum/)
-   -   Cannot Remove Last Headstud (http://forums.pelicanparts.com/911-engine-rebuilding-forum/908731-cannot-remove-last-headstud.html)

arbita1 04-04-2016 01:08 PM
I ordered the better tip that heats faster. I'll have that on Wednesday and we'll see what happens.


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theiceman 04-05-2016 08:52 AM
Quote:
Originally Posted by boyt911sc (Post 9065119)
Matt,

I am doing my 15th engine rebuild and had encountered stubborn cylinder head studs maybe 3 times only. I usually do it without heat and could get them out around 30 mins. But with a stubborn stud, additional heat is needed. Apply heat for 10 to 15 mins. on the spigot using a MAP to melt the bond between the stud and the crankcase. If my memory serves me right, I have removed more than 150 Dilavars head studs. About 4 dozens or so Dilavars studs are saved in my garage.

Using a Snap-ON stud remover and a strong impact wrench are my primary tools which I learned from Tom Butler.

Tony
This . I had one I had to heat for 15 minutes with my map gas . I gave up on pipe wrench and got a set of vice grips on the stud. the stud actually began to twist at one point but she finally let go and was miserable all the way till the end . What a satisfying feeling getting that last bugger out.

Ed_914 04-05-2016 10:45 AM
I slid a nut over the stud till about 2 inches above the case and mig welded it from both sides. heated the case 15 minutes with the torch. (use plain steel nut). Put a ring spanner and an 1.5 foot breaker bar on it. On the ones broken off just above the case I put a washer onto it to protect the case and mig welded also a steel nut on it. Heated the case again for 15 min. All 24 studs came out including the 7 broken dilivar studs. When I delivered my parts to the machine shop the owner said to me " We put the case in an oven and take them out for free as we hate solving client mishaps" Still very satisfying to have done it myself.

theiceman 04-05-2016 03:41 PM
Quote:
Originally Posted by Ed_914 (Post 9067327)
I slid a nut over the stud till about 2 inches above the case and mig welded it from both sides. heated the case 15 minutes with the torch. (use plain steel nut). Put a ring spanner and an 1.5 foot breaker bar on it. On the ones broken off just above the case I put a washer onto it to protect the case and mig welded also a steel nut on it. Heated the case again for 15 min. All 24 studs came out including the 7 broken dilivar studs. When I delivered my parts to the machine shop the owner said to me " We put the case in an oven and take them out for free as we hate solving client mishaps" Still very satisfying to have done it myself.
not a better feeling when you are sitting back staring at it after with a beer in hand !!!

911pcars 04-07-2016 11:30 AM
You need to add thread penetrant into the above equation (same as for removing exhaust system fasteners) It helps dissolve any metal corrosion and reduces friction between the threads. I use Kroil, but other brands are better than nada.

Sherwood

arbita1 04-07-2016 12:21 PM
Quote:
Originally Posted by 911pcars (Post 9070166)
You need to add thread penetrant into the above equation (same as for removing exhaust system fasteners) It helps dissolve any metal corrosion and reduces friction between the threads. I use Kroil, but other brands are better than nada.

Sherwood


I've been hitting it with PB Blaster.

Yesterday I received the recommended torch for my map gas canister. The flame is much bigger than my other torch. So hopefully I'll get to try it tonight.

arbita1 04-07-2016 04:38 PM
Thanks guys! That worked!!http://uploads.tapatalk-cdn.com/2016...fdd81a84a5.jpg
http://uploads.tapatalk-cdn.com/2016...f35f00cf18.jpg

On to the next step!


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porterdog 04-08-2016 05:13 AM
For how long did you need to heat?

theiceman 04-08-2016 05:56 AM
i bet a while, that bugger started to twist, i had on of those too , it seems every engine gets one ..

at the factory .... " remember guys, put that super epoxy on one stud on every engine to discourage those DIY guys "

lol

arbita1 04-08-2016 06:00 AM
Quote:
Originally Posted by porterdog (Post 9070933)
For how long did you need to heat?


Maybe about 5-8 minutes.

arbita1 04-08-2016 01:50 PM
Quote:
Originally Posted by boosted79 (Post 9064842)
That's the torch you need. Just keep the heat on it until it lets go.


Thanks for recommending this torch. It's my new favorite tool. I was having trouble removing the pulley bolt. My 1/2" electric dewalt wasn't breaking it free. And that thing is powerful.

I soaked in PB blaster overnight. Hit it with the torch today for a few minutes. And I spun it right off.

Ready to split the case. [emoji53]

boosted79 04-08-2016 02:26 PM
Glad it worked out for you. It's great for lighting cigars too!

arbita1 04-08-2016 04:17 PM
Whoa. Cool.

http://uploads.tapatalk-cdn.com/2016...5d52d172be.jpg


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