Cylinder Head Jammed on Studs

Talk about the E-Type Series 3

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panamacarrera
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#1 Cylinder Head Jammed on Studs

Post by panamacarrera » Mon Mar 12, 2018 2:55 pm

Hi All

Take a look at the photo...


Image

Image

I've been using a head puller to lift the left hand head off my motor. The head has cleared the long inner studs but has jammed onto the outer row of six short studs and nothing seems to shift the head.

Best suggestion I've had so far is to cut the studs with an angle grinder. Anyone had this problem and found a better solution?

Thanks

Nigel

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MarekH
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#2 Re: Cylinder Head Jammed on Studs

Post by MarekH » Mon Mar 12, 2018 3:41 pm

Dear Nigel,
Unfortunately I can't see the pictuures on my computer, but the sensible suggestion is that something is not as straight and parallel as it should be.
kind regards
Marek

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mgcjag
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#3 Re: Cylinder Head Jammed on Studs

Post by mgcjag » Mon Mar 12, 2018 3:53 pm

You can clearly see in the photo that the 6 outer studs are all curved so as Marek said above the head is not being lifted in line with the studs... Steve
Steve
1969 S2 2+2 & Building a C type replica

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Whitact
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#4 Re: Cylinder Head Jammed on Studs

Post by Whitact » Tue Mar 13, 2018 8:02 am

Nigel,
Cutting the studs may not be a bad idea as they are now probably beyond further use. My car suffered a stud failure about 12k miles after an engine rebuild. After a lot of head scratching and analysis the most likely cause was that the stud had been slightly bent when the heads had been removed for the rebuild. The bending was almost certainly caused by the heads getting stuck as in your photos. Removing the remnants of the broken stud took a week, during which two extractors expired in the process. The drum type with offset holes are just not up to the job.
Good luck,
Adrian Turner
S3 OTS & FHC
S1 FHC
XK140 FHC

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politeperson
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#5 Re: Cylinder Head Jammed on Studs

Post by politeperson » Tue Mar 13, 2018 8:15 am

Cut the studs. At least cut the bent one, it wont be going back on again.
James

L.J.K. Setright was right.
"You just cant beat a good E-type"

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jagwit
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#6 Re: Cylinder Head Jammed on Studs

Post by jagwit » Tue Mar 13, 2018 1:47 pm

panamacarrera wrote:
Mon Mar 12, 2018 2:55 pm
Anyone had this problem and found a better solution?
Should have asked me for my head removal tool:

(Shipping would have cost more than a completely new engine!!! :bigrin: )

tn2_DSCF1619.jpg
tn2_DSCF1619.jpg (157.07 KiB) Viewed 460 times
Best Regards
Philip
71 E-type V12 Coupe,
80 XJS (EFI by Megasquirt & EDIS-6 + 5sp manual overdrive)
73 Jensen Interceptor
74 Interceptor (EFI by Megasquirt + overdrive 4sp auto)

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panamacarrera
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#7 Re: Cylinder Head Jammed on Studs

Post by panamacarrera » Mon Mar 19, 2018 11:57 am

Sorted!

Ten minutes and an angle grinder, job done. Now to get those chopped studs out.

Thanks to all for help & advice.

Cheers!

:drinkingcheers:

Nigel



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