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#1 V12 cylinder head removal

Posted: Tue May 17, 2016 8:29 pm
by RSM
Hi Rob Gill here,
I may have to remove my cylinder heads,in the repair operating manual it states that certain special tools are required,does anyone know where i could
get these tools from?.
Thanks RSM

#2

Posted: Tue May 17, 2016 9:46 pm
by jivili
Rob
I made my own head removal plate from a drawing I found on the web
It takes about an hour to make the plate and about 2 hours per side to remove the heads or you might be lucky and have it done in a couple of hours if the heads aren't seized on.
I don't have any photos of my plate but as I recall it was 10mm thick and you basically bolt the plate to the head and use studding against the head studs to wind off the head.... not a quick way but effective
If you don't want to fabricate your own have a look on eBay as they are often for sale there

#3

Posted: Tue May 17, 2016 9:50 pm
by jivili
Rob

Have a look here for an explanation

www.xj13.eu ? post ? 2010/01/28 ? V12...

#4 cylinder head

Posted: Tue May 17, 2016 9:51 pm
by RSM
ok ,i have seen the plate on youtube ,what about the other tools in the service manual.
Thanks Rob.

#5

Posted: Tue May 17, 2016 10:02 pm
by jivili
When I rebuilt my engine the only special jaguar service tool I used was the cam setting gauge.
There are numerous workarounds and homemade solutions for all the other service tools that the manual tells you you need.
I think that if you are a JEC member they have some that can be hired but I didn't find the need to use any.
I believe that there is a guy in Worksop/Bawtry that does offer the service tools in the manual for hire if you want to go down that route.
You will find that Google is your best service tool I know I did
There is loads of info out there and you may struggle to get answers to the kind of questions that have been asked lots of time before on the forums imho

Regards
Dean

#6

Posted: Tue May 17, 2016 10:02 pm
by jivili
When I rebuilt my engine the only special jaguar service tool I used was the cam setting gauge.
There are numerous workarounds and homemade solutions for all the other service tools that the manual tells you you need.
I think that if you are a JEC member they have some that can be hired but I didn't find the need to use any.
I believe that there is a guy in Worksop/Bawtry that does offer the service tools in the manual for hire if you want to go down that route.
You will find that Google is your best service tool I know I did
There is loads of info out there and you may struggle to get answers to the kind of questions that have been asked lots of time before on the forums imho

Regards
Dean

#7

Posted: Tue May 17, 2016 10:18 pm
by vee12eman
Hi Rob,

Jivlii has shown you the tool for removal ? this is the most important removal tool you will find. If you don?t want to make the tool yourself, using these images for guidance, or better, the excellent drawings available if you send Neville from the excellent XJ13 site an email request (I emailed him from the site only last week and received my copies of the drawings a day or so later), then try these sites:

http://www.ebay.co.uk/itm/Jaguar-V12-cy ... SwMORW7sj2

Or

http://www.ebay.co.uk/itm/Jaguar-V12-Cy ... Sw9r1WBawn

These tools are not as substantial as Nevilles' design but will probably suffice if things aren't too seized up in there.

As to the other tools, see whether Jaguar Drivers? Club or Jaguar Enthusiasts club still rent out these tools to members, they used to hire them out when I lived in UK, albeit that was some time ago. I think they sell them in some cases too, the last time I checked they recommended Ken Jenkins to supply them, but there is a link on the JEC site. Many of the tools aren?t really necessary, as Jivlii says, there are often work arounds.

However, Why do you want to take the heads off anyway? Don?t underestimate the difficulty this can pose. One of the few drawbacks of the V12 is the fact that electrolytic corrosion can stick the heads very firmly to the studs and cylinder block. You hear many, many stories of people who fall faoul of this problem and indeed I am one of them. Mine was stripped by a well regarded expert and even he, with the special tools all to hand, couldn?t manage to separate them and I ended up with a later engine, to which most of my original parts were transferred. I suggest that you do a compression check first and if that is OK, I wouldn?t attempt separation unless there is something significantly wrong with the unit, at least not until you have to. If you really want to have a look inside then try one of the Borescopes/endoscopes available, some will now attach to smart phones, tablets or laptops.

Of course, if you think you have a failed Head Gasket, then all bets are off and you may have to go for it, but be aware it?s potentially a bear of a job. Being aware of this influenced my decision to have this job farmed out to a specialist, even though I did every other task on the total restoration of my car myself and I have rebuilt several engines, both for pleasure and at work. It proved to be the correct decision!

Regards,

Simon

#8 V12 cylinder head removal

Posted: Wed May 18, 2016 7:29 am
by RSM
briefly, Have had an overheating problem,and now a missfire.
although i hav,nt done any of the checks yet. head gasket?
Rob

#9

Posted: Wed May 18, 2016 8:12 am
by mgcjag
Hi Rob....plenty of other things to check befor even considering pulling the heads just for overheating and a misfire......give the engine a good flush out and check both thermostats..if the car hasnt been used much in the past flush out the fuel tank, fit new filters, overhall the carbs, and check out the notorius ignition system....note for your diary SNG open day at Bridgenorth 9th July and ther open day Shelsley walsh on the day befor 8th.....Im not too far from you.. Ludlow....all the best Steve

#10 Re: V12 cylinder head removal

Posted: Wed Sep 07, 2016 6:32 am
by flyer295
Hi,

I make and sell the head removal tool along with a timing chain retractor tool.

E-mail me at nimbus295@aol.com

Bob

#11 Re: V12 cylinder head removal

Posted: Tue Oct 25, 2016 3:48 pm
by jagwit
Meet "Godzilla": my own V12 head removal tool:

Image

Image

#12 Re: V12 cylinder head removal

Posted: Tue Oct 25, 2016 9:33 pm
by 42south
Hi
A couple of us down under have used the simplified version of the tool, as shown in Vee12eman's second web link.
This tool is basically just the bottom plate of Nevilles excellent design. It worked with no problems on 3 engines down here, with the proviso to use high tensile steel for the threaded rod through the plate.
Be careful to keep the plate parallel to the block when turning the screws, I just used a steel rule to keep the gap roughly equal front to rear.
good luck.