I'm fairly new to this sight, so sorry if this is an old, tired topic. I've recently come into possession of a beautiful S-Type 4.0, which I am very happy with, except for the rattle from the engine at startup (and sometimes when I'm accelerating in city driving).

I've been weighing my options for fixing this problem, and it seems like between replacing all the chains and tensioners and putting in a second hand engine, the latter appears to be the easier of the two (though it may cost a bit more). I plan to do all the work my self, since either option would be far too costly to have a shop do.

I'm fairly mechanical, and have a family member who is an experienced mechanic willing to help me quite a bit.

Since transplanting the 4.0 with another low milage 4.0 is no guarantee that I won't encounter the same problems down the line, I'm wondering about the feasibility of transplanting a 4.2 into my car. How difficult would it be to get the electronics to play nice? Will the ford transmission bolt right in? Anyone done this before?

I have tried selling it so I could buy a car with the 4.2, but I have not had much success with that yet.

Thank you!

 

I feel your pain. My 4.0 is going to take probably $2,000 in parts for the engine repair, so I am looking at putting a 4.2 in for roughly the same money. If I learn anything useful, I'll post it. However, our cars a different.

 

Forget about getting the 4.2 into the pre-2003 S Type - the 5R55n Trans more than likely won't bolt up and you will have to replace at minimum - the ECM and engine harness (and this is being highly optimistic)- best bet - if the engine compression is good across all cylinders - get all the tensioners and guide rails changed out.

 

I see...so a 4.2 swap is not ideal then? Does the supercharged 4.0 offer any advantages, besides power, over a regular 4.0 as a replacement engine? Were they perhaps built more sturdy?

 

A 4.0 supercharged swap will be far more complicated than a 4.2 swap.

However, if you are looking at replacing vehicles, yes, the 4.0 supercharged are somewehat more sturdy with more of the cooling system and intake made of aluminum rather than plastic.

This post will give you an idea of the 4.0 to 4.2 transplant...not trivial: https://www.jaguarforums.com/forum/g...k-4-2-a-23763/

 

I see...this may in fact be as much work as replacing the tensioners and chains after all! Hmm...back to plan A: sell it! If that fails, I should find a place to rent the timing tools.

 

There's A 4.0 Supercharged? I Know There's A 4.2 Supercharged.

 

It sounds to me like all you need to do is change the guides & tensioners to cure the rattling noise which is relatively cheap on parts and not too complicated to do.


Dave

 

ONEsicJAG See AJ26S
Jaguar AJ-V8 engine - Wikipedia, the free encyclopedia

 

There's a 4.0 SC but not in the S-Type

 

Not for the S type, just the XKR and XJR.

 

Don't Forget The 00-02 Vanden Plas.. I Learned That In The Link police666 Provided. More Jaguar knowledge For My Hungry Brain.

 

Does any other (Ford) engine fit? If this Ford Trans fits Mazda bravo etc is there a wide range of engines to consider? apart from Lincoln . My engine is still good at this stage. Paul

 

Forget the engine. Think about the computers. They control everything: engine, autobox, cruise, climate control, brakes, etc. Anything can be done, but the cost will be 10x or 100x value of car.

 

Why don't you just buy and fit this:

JAGUAR XJ8/XK8/XKR/V8 S TYPE TOP TENSIONERS/CHAINS KIT | eBay


It'll probably solve all the noise problems at one go !

 

I think that if I go through all the trouble of taking everything off to access the tensioners and chains, I'll probably just do all of them, thanks for the link though. I may end up buying this kit: http://item.mobileweb.ebay.co.uk/vie...d=181040020374

I'm going to give it a few more weeks to sell though, so I can buy a 4.2 S-Type if it does.
Cheers!

 

Man that is a NICE complete kit!!

Even has upgraded chains which I had never heard of before. The 4.2L got an improved chain but this is the first for a 4th generation chain on the 4.0L.
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