I hope you have the JTIS and are following it? Please don't tell us your trying to wing it???

How far off are the flats? You do know the valves will hit the pistons right?



You must first lock the crank with a special holding tool. Forget about TDC you need to follow Jaguar's instructions.

You also need these special tools;

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Hi Guyz...

 

I don't have those tools.. and I have no idea how to aquire them... also probably can't afford them. But I have some knowledge on my side... I know I can find TDC if I carefully look at the valves and their position of rotation.

Right now, i'm not exactly sure what the correct position is, but I think there is a more certain way than just locking things up. What if the timing is already off anyway? Then locking things up won't help, correct?

I made some marks with a marker to tell me where I was originally so I can put things back if I have to.

 

Well your reinventing the wheel. Maybe that will work but there is a reason Jaguar has the tools and a procedure for this repair.

Do you have the JTIS?
It's free on this forum.

No there is NOT a more certain way than locking the engine down. You found this out when you saw the cams move when the chain was removed. That's why it needs to be locked down when you assemble the chains and tensioners.
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The engine is NOT TIMED AT TDC!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

I don't know how many times I answered the Jaguar Shop phone and had some other repair shop tell me "We set the V8 on TDC and lined up the cam flats and now the engine hardly starts or runs".

The engine times at 45 degrees AFTER TDC!!!!!!!!!!!!!!!!!!!!!!!!!!!

Please find, download and read my .pdf copy of Jaguar Engine Repair Course 168.
It is on the internet for all to see.

bob

 

Unless you're very adept at using a dial indicator, do as instructed above and get the JLR tools or the vehicle won't run correctly.

Worse yet, you may have catastrophic engine damage if the pistons contact the valves.

 

Here is what you need to correctly time the AJ-V8 valve train:

https://www.ebay.com/itm/Jaguar-Land...0AAOSw~gRV6o8J

 

Thanks guyz... points well taken. I was wondering about this. I'm looking for a shop in the DFW area that can rebuild the heads for me. I don't want to bother putting the chain on if the valves haven't been rebuilt or at least adjusted. I wonder if there are any shops that do this kind of work anymore?

Someone once told me it's impossible to "reseat" the valves on these heads... is that true?

Again thanks for your help guyz...

 

Well you have one of the TOP Jaguar mechanics in the country answering you on this thread (Motorcarman).
Look up where he is; Decatur, tx

How far is that from you?

Don't know what is meant by re-seating the valves? What's wrong with them?
You can get rebuilt heads for the 4.0L V-8 if needed?

http://www.blackdogmanufacturing.com...nder-heads.htm
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I've decided to unbolt the heads and bring them to a shop to be rebuilt... but I have not found a shop that can do it yet. Maybe I should send them to England?

I feel like this job is a waste of time without doing the head gaskets too. Common sense dictates this I think.

 

If you do report back on what it cost if you can.
Also compare it to the rebuilt heads I linked above. I would be worried that the shop you get to redo the heads is not familiar with Jaguar?


Any idea what re-eating the valves was about? I am not sure what they mean?
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Definitely not paying over $1000 for rebuilt heads. Thinking $375 with the core for each side. I definitely have bad heads because the valves are moving around and pushing in with ease. Not good.

There is a shop in Grand Prairie, Texas that exchanges the cores. I will head over there and ask them... when I get these suckers off!

Very strange T?? Bolts... looks like a HUGE STAR BOLT no idea what size... will post some pictures.

Now I really need to know how to line things up... There is a relation between both "flat marks" on both cams and how they relate. The question is... does any mortal here know what that relation is?

And can they explain it?

 

Do everyone a favour and read the Workshop Manual so you know the proper procedure. As stated earlier in this thread, it's a free download.

Below is an explanation of the AJ-V8 engine; refer to page 27 regarding the engine timing procedure.

The cylinder head bolts should be M10 X 175mm.

 

The later engines used RIBE or 'poly-drive' socket head bolts. Replacement bolts are offered this way.
VW started using these over a dozen years ago.

Sounds like you need to visit a tool truck and do some shopping.

Hope you do some reading and try to understand the way these engines were designed and assembled.

bob

 

Oops it looks like someone forgot to mention that the JTIS is a useless 20 year old piece of archaic outdated software with no hope of running on any modern Windows computer in a stable fashion

 

Did you go through the attached PDF included with post 33?

 

Both the Engine Repair Course 168 and 180 are .pdf and will run on any windows platform that supports Adobe Acrobat Reader.

bob

 

Would anyone here be willing to post a link? It's quite a lot of trouble to search for something when:

A) I have no idea what i'm searching for

B) No idea what course I need

C) Have no idea what JTIS Stands for

D) Have tried to UNZIP and INSTALL this "Jaguar Software" and it CRASHES IMMEDIATELY

E) Sometimes it's no surprise to me Jaguar went out of business and was sold to an Indian Motor Company

 

Thanks guyz... my apologies I didn't see the previous post with the PDF attachment so I went along and was trying to install the JTIS without any success.

It literally was crashing every time

Okay so now I am on the hunt for the Ribe Bit Socket in 12mm. Maybe this can be ordered online for a reasonable price?

I was very disappointed to find those bolts underneath.

 

Another big problem is I can't find new springs and valve seats online. I searched on eBay and I don't think the correct ones are easily available if at all. New valves would be nice if someone makes them too.

I will get back to you guyz on this. I'm going to try to install new springs and post pictures of the process.