Hello list
I’m going to exchange my original 3.8 engine temporarily with a 4,2 xke
series-2 engine (7R3267-9) on my 1962 e-type, FHC no: 886738. Is there
anybody out there with experience in a similar conversion. The 4.2 does not
have any accessories, like carbs, water pump, starter ++. What parts are
interchangeable between the engines? I assume the starter has to be changed,
but can the tipple-SU be fitted? Is there any problems in integration with
the Moss-box? Is the engine mountings the same on both the engines? Can this
be done easily (temporarily, while sawing for an complete overhaul on the
3.8, after a timing chain failure) without compromising the car?
Is there any parts that I might as well upgrade, in the process of changing
the engine (except for the clutch).
I’m hoping someone out there can give me some useful hints on how to
confront the situation with probable success the first time.
Regards Even Krogstad, FHC no: 886738, Norway.
In reply to a message from SolveigEven sent Tue 26 Nov 2002:
Even,
I don’t believe there are any real problems.
The triple SUs can definitely be installed pretty easily (I’ve
done it), but does require freeze-plugging two holes in the water
jacket, and some minor hose work.
It is my understanding the ring gears are different, and the
starters are different, but I’m pretty sure the engine will mate
with the Moss box. You’d have to get a 4.2 starter, and I think an
adaptor may be required to bolt it up to the 3.8 bell housing.
It may be possible to use the 3.8 flywheel and starter, I’m not
sure.
The 4.2 block does not have the mounting bosses for the
generator bracket, so you’ll have to either fabricate a new
bracket, or switch to an alternator (recommended in any case).
Using the Lucas alternator, this would require some extra wiring
and the regulator. Using the 2-wire self-regulated Hitachi
alternator from an '82 Nissan pickup, it should pretty much bolt
right up (big wire to the battery, little wire to the idiot light,
jumper on the old regulator to bypass the cutout relay). I put
this alternator on my 3.8, and it’s great.
I believe you may also have to use the 3.8 exhaust manifolds,
depending on the type of headpipe connection you have.–
Ray Livingston
Santa Cruz, CA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
I’m going to exchange my original 3.8 engine temporarily with a 4,2 xke
series-2 engine (7R3267-9) on my 1962 e-type, FHC no: 886738. Is there
anybody out there with experience in a similar conversion. The 4.2 does not
have any accessories, like carbs, water pump, starter ++. What parts are
interchangeable between the engines? I assume the starter has to be changed,
but can the tipple-SU be fitted? Is there any problems in integration with
the Moss-box?
Hello Even,
The bellhousing bolt pattern never changed, so the Moss box will bolt right
on. The key is that the bellhousing determines the starter, and the starter
determines the flywheel. The 3.8 has a 104 tooth ring gear and the inertia
starter and the 4.2 a 133 tooth ring gear and a preengaged starter. If you
are using a Moss box bellhousing, you should use the 3.8 starter and
therefore the 3.8 flywheel.
the back , transmission side, of the bellhousing IS NOT the same on a 3.8 as
the 4.2.
Hello Bob,
Yes. I think he is bolting a 4.2 block to the front of a 3.8 Moss
bellhousing. There are other 3.8 bellhousings for the sychro box, but I
don’t think that is his question. I was told there is a difference between
the starter alignment on the 3.8 bellhousing and 4.2 bellhousing, have you
seen this ? There were sychro boxes fitted to other Jaguar 3.8’s, but never
preengaged starters to Moss bellhousings.
on 11/26/02 1:01 PM, Tlsalt@aol.com at Tlsalt@aol.com wrote:
The back , transmission side, of the bellhousing IS NOT the same on a 3.8 as
the 4.2. The bellhousing retains the front transmission bearings and the 4.2
bearings are larger. If you retain the moss box you MUST use the 3.8
bellhousing. The 3.8 flywheel should bolt right on the 4.2 crank.
Bob> Even wrote,
I’m going to exchange my original 3.8 engine temporarily with a 4,2 xke
series-2 engine (7R3267-9) on my 1962 e-type, FHC no: 886738. Is there
anybody out there with experience in a similar conversion. The 4.2 does not
have any accessories, like carbs, water pump, starter ++. What parts are
interchangeable between the engines? I assume the starter has to be changed,
but can the tipple-SU be fitted? Is there any problems in integration with
the Moss-box?
Hello Even,
The bellhousing bolt pattern never changed, so the Moss box will bolt right
on. The key is that the bellhousing determines the starter, and the starter
determines the flywheel. The 3.8 has a 104 tooth ring gear and the inertia
starter and the 4.2 a 133 tooth ring gear and a preengaged starter. If you
are using a Moss box bellhousing, you should use the 3.8 starter and
therefore the 3.8 flywheel.
on 11/26/02 1:55 PM, Tlsalt@aol.com at Tlsalt@aol.com wrote:
Hi Paul,
When I converted my 64 to the sychro box I had the 3.8 bellhousing
machined to accept the 4.2 bearings. A friend of mine used the 4.2
bellhousing with the 3.8 starter when he did his. I’m sure he left the
starter spacer plate out. I used the original housing just in case there
could be an alignment problem as you suggest.
Bob> Bob wrote,
the back , transmission side, of the bellhousing IS NOT the same on a 3.8 as
the 4.2.
Hello Bob,
Yes. I think he is bolting a 4.2 block to the front of a 3.8 Moss
bellhousing. There are other 3.8 bellhousings for the sychro box, but I
don’t think that is his question. I was told there is a difference between
the starter alignment on the 3.8 bellhousing and 4.2 bellhousing, have you
seen this ? There were sychro boxes fitted to other Jaguar 3.8’s, but never
preengaged starters to Moss bellhousings.
In a message dated 11/26/02 1:58:49 PM Pacific Standard Time, Tlsalt@aol.com
writes:
<< Bob wrote,
the back , transmission side, of the bellhousing IS NOT the same on a 3.8 as
the 4.2.
Hello Bob,
Yes. I think he is bolting a 4.2 block to the front of a 3.8 Moss
bellhousing. There are other 3.8 bellhousings for the sychro box, but I
don’t think that is his question. I was told there is a difference between
the starter alignment on the 3.8 bellhousing and 4.2 bellhousing, have you
seen this ? There were sychro boxes fitted to other Jaguar 3.8’s, but never
preengaged starters to Moss bellhousings.
My 3.8 engine has a 3.8 starter, 3.8 flywheel w/ring gear, and modified 3.8
bellhousing w/synchro transmissionb. It works fine.
Classic Jaguar modified the 3.8 bellhousing for me. The alternative was to
change flywheels and starters, as I understand it. A 4.2 tranny and
bellhousing would not properly interface with a 3.8 flywheel and starter.
Mike Moore
63 OTS
Sounds to me like Even's best option is put the 3.8 flywheel on
the 4.2 engine, and use his 3.8 starter, right? Seems to me this
should work with no additional changes, right?–
Ray Livingston
Santa Cruz, CA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
In a message dated 11/26/02 5:22:15 PM Pacific Standard Time, rayl@atc.creative.com writes:
<< Sounds to me like Even’s best option is put the 3.8 flywheel on
the 4.2 engine, and use his 3.8 starter, right? Seems to me this
should work with no additional changes, right?
Ray,
I haven’t done that-it sounds reasonable. I don’t understand what the spacer
is for and when its used. That may be an issue (or may not be).
Best, Mike Moore
Mike,
I don’t understand that either, but my impression is the spacer
is only required for the 4.2 starter, so should not be an issue
here.–
The original message included these comments:
I haven’t done that-it sounds reasonable. I don’t understand what the spacer
is for and when its used. That may be an issue (or may not be).
–
Ray Livingston
Santa Cruz, CA, United States
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–