question J60 Jaguar 4.2l engine variations

[robin craig]

I was speaking with someone yesterday who stated that there were variations in the design of the J60.

 

I am told that some had dry liners and some did not and there is a way to tell the difference by the engine serial numbers.

 

Can anyone shed some light on this subject?

 

R

[Manylandrovers]

Trouble is I think he wants £800 for the lot...

[Manylandrovers]

Thanks, I'll try xk engineering. (Does anyone know their price for a piston?)

Also, I've tried to find banisters on google. Are they a us site? Any chance of a link?

Andrew

[Richard Farrant]

Thanks, I'll try xk engineering. (Does anyone know their price for a piston?)

Also, I've tried to find banisters on google. Are they a us site? Any chance of a link?

Andrew

 

hi Andrew,

Here is the webpage for Banisters, http://www.milweb.net/go/banister/ They are in East Sussex.

 

regards, Richard

[Manylandrovers]

Richard, that's most kind thank you

Andrew

[Manylandrovers]

Looks like it will have to be banisters; no-one does individual pistons anymore....

does anyone know the part number of the thick exhaust valves that a j60 has?

regards,

Andrew

[Manylandrovers]

Well, I managed in the end to get 2 Pistons from David Manners and a second head from the jag spares day at the NAC. Not a bad day in all! Gasket from xmod and the rebuild can start:-)

[timbo]

Pics please!

[datadawg]

I am buying a Fox now in UK and after reading this thread, my excitement of purchase has now turned to trepidation. I plan to having the Fox completely overhauled before importing it to US, which will include engine removal for painting, etc. Is there anything that should be done/serviced/checked regarding the engine (other than fluid changes), to be "safe", since it's going to be out and easy to do?

 

The work will be done by Baz at trackfix.

[robin craig]

Replying to my emails might help you

 

Robin

[datadawg]

Replying to my emails might help you

 

Robin

 

Robin, I apologize, I had it on my list to call you, but I got jammed before leaving on family vacation to Mexico and never did. I will call you when we are back in US.

[teletech]

I found the following article very interesting in considering the 4.2 engine.

It would seem that the latest block and crank should be used and rebuilt carefully if one must run a petrol motor.

Careful consideration of bearings might help with the oil starvation that seems to cause so many thrashed blocks.

 

http://www.jagweb.com/aj6eng/xk-engine/index.php

[Grasshopper]

Thanks for posting, interesting article. It does explain why these engines are quite fragile, especially in an AFV (for which they were not designed or intended). Running in that sort of an environment can't have done it any favors, I can see a few reasons (other than to run on low grade fuel) why they were de-tuned.

 

Made me think maybe I ought to prioritize an engine service!

[teletech]

I was planning on putting a 4.2 back in but it really gave pause thinking about all the potential failure points. It actually seemed like decreasing the displacement might have been a better way to do the de-tune as some thicker cylinder walls would have helped things but I suppose Jag would have had to make some investment for that to happen.

If one wanted to spend a lot of time and some money one *could* build one that had a reasonable expectation of a long life but it would take some doing: mid-80s crank with polished gallery bores and chamfered holes , late block (carefully magnifluxed), new pistons, flow the head, balance everything, add the groove in the crank journal bearing, carefully selected thermostat (what a thing to have to worry about)... what have I missed?

 

I guess it's a reminder to change oil frequently and verify your rust inhibitant in your coolant. I have used water-wetter in the past in some road-going vehicles and it seems to help.

 

And of course to have a recovery plan!

[datadawg]

Photos of my Fox's engine before and after OH. I can see the ribs but that's the extent of my expertise on identifying it. I believe it is not the original engine. Any ideas from the learned what type it is?

[robin craig]

I would say by the photos that is Baz at Rack Fix that did the work for you?

 

Robin

[RogerL]

 

I am not a dyed in the wool military vehicle man (althoughafter reading your forum entries, I suspect I might become one). I am however aJaguar man and am currently writing an article on the Jaguar J60, XK variantfor the Jaguar Driver magazine. I have already been given an enormous amount ofhelp by Richard Frarrant and I wonder if I have your permission to use some ofyour images in the piece. I will of course acknowledge your help; if you will, pleasegive me a name I can print

Thank you in advance for your help.

RogerL

[robin craig]

Dear Roger L

 

I don't know that I personally have put much up but go ahead, use what you will, as for others, I hope they say yes also.

 

Robin

[timbo]

I found the following article very interesting in considering the 4.2 engine.

It would seem that the latest block and crank should be used and rebuilt carefully if one must run a petrol motor.

Careful consideration of bearings might help with the oil starvation that seems to cause so many thrashed blocks.

 

http://www.jagweb.com/aj6eng/xk-engine/index.php

 

Are they really that bad in privately owned CVRT's though..? Certainly the 5.9's are more robust, but provided you're not wringing it's neck and you watch oil levels etc is it that big a problem?

 

At the end they had all been further detuned to 175bhp I believe... I have sold a few of these engines recently and they've not all been trouble free. One of my customers managed to put a two inch hole in the block, but he had spent the last 2 years bouncing it off the limiter - I declined a refund!!

 

By all means if you have to rebuild an engine, you may as well do it to the best possible standard, but if it ain't broke don't fix it!

[datadawg]

I would say by the photos that is Baz at Rack Fix that did the work for you?

 

Robin

Indeed, Robin, you have a keen eye. My Saracen is finished, but the Fox is still at Trackfix, I am fine with Baz taking his time with the work!

[datadawg]

 

I am not a dyed in the wool military vehicle man (althoughafter reading your forum entries, I suspect I might become one). I am however aJaguar man and am currently writing an article on the Jaguar J60, XK variantfor the Jaguar Driver magazine. I have already been given an enormous amount ofhelp by Richard Frarrant and I wonder if I have your permission to use some ofyour images in the piece. I will of course acknowledge your help; if you will, pleasegive me a name I can print

 

Thank you in advance for your help.

 

RogerL

 

Roger, feel free to use my photos. Please do post a link to the article on this forum, so we can all read it.

Gary Pave

Pennsylvania, USA

[Braillescaledave]

The J60 was also fitted to some 'R' series Dennis fire appliances- Not a great success according to my old dad- said they accelerated well, just couldn't keep it going- Not surprising really, 16t full-up fire engine being a somewhat different kettle of fish...