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XJ6 & XJ12 Series I, II & III 1968-1992

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  #1  
Old 04-15-2009, 06:11 PM
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Default Stake down kit

Somebody here has to have a picture of a stake down kit before and after! I've seen the kit pop up occaisionally, but noone ever gives a good picture of what I'm looking for. Also, where can I buy one, or is it something I can just do without buying a kit? Google search turns up squat. I highly doubt that my XJ has one, since both PO's knew little more about a c@r than how to drive it.

HELP!?! PLEASE!?!!
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  #2  
Old 04-15-2009, 08:04 PM
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Hey moron,

Have a look to see if there is anything on Motorcars Ltd. If they can't help you , hit me with a PM. I have kits, no pics.
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Old 04-15-2009, 08:55 PM
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HI

I have some XJs with the kits that I can post a picture of, and some without. I'll try to get them posted for you tomorrow.

Also have one that had the stakedown kit installed, and still threw a tappet guide. Totally ruined the head, not pretty. But I'm sure there were more underlying reasons for that.

Definetly pick one up --- JTO is probably a good source.

David
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Old 04-16-2009, 09:53 AM
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Thanks guys. A pic is always worth a thousand words. I've done plenty with sbc heads-lapping valves, replacing springs, pinning studs, tapping/screw in studs, but want to know what I'm getting into on this 4.2 as it is new to me.

Ken is offering one for $31.95 + shipping. Sounds reasonable enough.

For anyone looking into this for future reference link to Kens stakedown kit.
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Old 04-16-2009, 08:10 PM
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Default Stakedown Photos

Here are some photos of the stakedown kit.
This is on a car that has a damaged head, the cam covers have been removed a while, hence the rust on the tappets.

The first is an undamaged kit installed.
The second is one that has the securing bolt broken into the head, and the tappet guide really torn up.

David
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Stake down kit-forum1.jpg   Stake down kit-forum2.jpg  
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  #6  
Old 04-17-2009, 10:24 AM
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Thanks Dave! A couple more questions: To see if these are installed I will need to remove the valve/cam cover? If that is true then I will need new gaskets. Are there different kinds available, with sbc's I have used poly and cork. The poly seemed to leak, but held up better...the cork didn't leak as bad, but liked to stick to the head. I put a thin bead of Right Stuff silicon between the cover and the gasket so it would stick to the cover when removed. Bear in mind that I had to reset the lash every couple weeks on the mechanical cam/lifters, so easy removal and not having to replace gaskets every time (esp. at the track) was essential. Is silicon between the gaskets recommended on these to help sealing?

Next question(s): The cam has to be removed to put in the stakes? Sure looks like it-seems obvious! What do you torque the bolts to after replacing? Do the cams connect directly to a gear on the timing chain? Any tips on that...if necessary? Is it best to install the kit on both intake and exhaust? I've seen some say the exhaust is the only side that requires the kit.

At present I only have a Haynes manual that came with the c@r. It is good for translating English to Yankee, but sketchy on many other things.....Gotta get the factory manual, I know, I know!
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Old 04-17-2009, 11:23 AM
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I dont know much about the stake down kit, but having just done a head rebuild, I did not use any silicone on the gasket. There are several schools of thought on this matter

Jag never used silicone, whether that is good or bad I dont know.

Yes the cams connect via 4 bolts per gear to the timing chain. Releasing the cams from the gear and putting them back together isnt too horrible, but is a bit fiddly. Have to make sure you dont drop parts inside the engine
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  #8  
Old 04-17-2009, 02:15 PM
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Exhaust side only in 99% of cases, this ancient head design only proved problematic when catalytic converters were added to the cars and resulted in increased exhaust temperature.

Remove exhaust side cam cover.

Clean out all residual oil in top of cylonder head thet you will see with cover removed.

Duct tape over the three oval shaped oil drain holes in the head. Now it's clean and protected enough to start drilling holes.

IF the tappet bores are still relatively intact, and there is a good lip on them in the area where the retaining plate recess will regester, hold each plate up against a pair ot tappet bores and puch mark the location of the mounting holes to be drilled.

Cheap kits are supplied with self tapping screws, these will easily snap off at about 4 ft. lbs. of torque, so the hole better be the perfect size in the perfect place. Good kits come with cap head machine screws, 1/4" x 20 (NC).

It's preferred if you do not drill all the way through to the oil return cavity in the head, but it really doesn't matter. I run a vacuum cleaner to remove the swarf as I am drilling.

Grease the tap to hold the swarf .

Bolt 'em on.

If you use silicone on both sides of the cam cover gasket, they will eventually slip out. Get the latest style Gortex material gaskets if you can find them, the original ones and common replacements are just treated paper like all other old Jaguar gaskets.

Use weatherstrip adhesive or brush-on Permatex to affix the new gasket onto athe clean cam cover. When that is cured, silicone sealer on the side that seals it to the head.

8 ft lbs for the retaining nuts, alot of torque cracks the covers.

The only reason to have to remove the camshaft is when one or more tappet bores have been badly damaged from repeated whacks by the cam lobe. That is a more involved repair, but can still be done with the cylinder head in place. You will have to get ahold of me if this is the case, few people know how to do it or have the correct tappet bores. If you buy a new bore to install, it can't be done with the head on the car.

Instructions for the tappet bore retaining plate kit installation were included with just about every kit I ever bought. These are from memory, after doing it a thousand times. Parts men and inexperienced repairers without the requisite knowledge need only tear open the bag to obtain the instructions.

Change the oil when you're done if it hasn't been done recently. The steps listed to prevent swarf from entering the engine are adequate, further paranoia is superflouous.
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  #9  
Old 04-17-2009, 03:33 PM
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Great explanation JTO. Thanks for taking the time to spell it out for me. Worth the price of admission!
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Old 04-17-2009, 03:39 PM
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Yes, the price of admission is alot less than the value of the contribution. That means you're far from the biggest moron in the room.
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Old 04-17-2009, 05:44 PM
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Quote:
Originally Posted by JagtechOhio View Post
Yes, the price of admission is alot less than the value of the contribution. That means you're far from the biggest moron in the room.
That's debateable...just ask Mrs. Moron!!

Everyone should know their limits and not be afraid to ask questions before going into something. Just 'cuz I know a bit about other engines doesn't make me qualified to tear into any engine and pretend to know what I'm doing. That kind of arrogance gets many people in trouble...I've seen it hundreds of times. Shade tree mechanics only takes a guy so far.

Once again, your help and the advice of others is greatly appreciated. Books and manuals can never replace the precautions and the pointers that you post up here everyday based on your repeated hands on experience.
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Old 04-17-2009, 06:07 PM
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I meant me.

But you're a good guy, so I'm happy to deliver the goods.
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  #13  
Old 04-30-2009, 03:51 PM
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I was flipping through the photo albums on the Jag-Lovers site and found Justin Wilt's pics of his installation of a stake-down kit. Thought I should steal it and share it here for any future reference.

Cam removed
Click the image to open in full size.

Close up of exhaust cam gear
Click the image to open in full size.

Drilling out the holes
Click the image to open in full size.

Test fitting the plates
Click the image to open in full size.

Plates installed
Click the image to open in full size.
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Last edited by moronthethrottle; 04-30-2009 at 03:56 PM.
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  #14  
Old 04-30-2009, 03:56 PM
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Default installation continued...

Close up of installed plate with washers, etc
Click the image to open in full size.

View of all installed prior to putting cam back in
Click the image to open in full size.

Cams in!
Click the image to open in full size.

Final lash checks, etc. According to Justin-"not as easy a job as one might think".
Click the image to open in full size.
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Old 04-30-2009, 04:11 PM
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Like I said, there is no reason to remove the camshaft. Do it any way you want.
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Old 04-30-2009, 05:02 PM
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Ya, I can see where it can be done without removing the cam. If I have to tackle this project, I will probably elect to leave it in....he seems to think it would be extremely difficult though.

Here's the link to his album: Jag-LoversJustinWiltStakeDownKitInstallation
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  #17  
Old 04-30-2009, 05:06 PM
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Good, that spares me from having to write any more complete descriptions which will likely be dismissed anyway. I've been reading JagLovers posts for 5 years. A couple of them were actually valuable.
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Old 04-30-2009, 05:06 PM
 
 
 
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Tags
1985, guide, head, install, installing, jaguar, jto, kit, lapping, stakedown, staking, tappet, valve, xj40, xj6, xjs



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