Hi group,

a friend of mine has a M201 Jeep, early 50's, made by Hotchkiss, and
beutifully restored (except some motor parts, obviously).
The Jeep has a flat four engine, with an exhaust heated intake manifold.
The car (sorry, the Jeep ;-) ) always ran very sluggish, expecially when the
weather is hot, and the motor tended to quit under hot conditions and hardly
started after running (vapor lock?) .
He found that the flap, which directed the exhaust gases to the
heaterchamber under the intake manifold, was stuck in the open position
(full heat). No way to move the darned thing.
He / we figured that the only way to get that thing going is to remove the
intake and the exhaust manifold and take everything apart. Soon that action
got stuck when a few bolts under the exhaust manifold, which are hardly
reachable, seem to be rusted onto the bolts and are unmovable. One of them
is already distorted by some former owner. We're afraid that we'll break the
bolts if too much pressure is applied.
We have a few questions regarding the whole process:
- is there any way to get the flap to move without removing the manifolds,
if possible?
- is there any trick to remove the manifolds, expecially reaching the nuts
under the
exhaust manifold, without having to pull out the motor? Special tool?
- is it normal, that studs reach into a water chamber? On loosening one
manifold nut,
the stud came out with it, and afterwards cooling water shot out of the
hole.

Any advise is greatly appreciated! This thing has really become a bugger.

Regards,
Mark

 

Hi Mark,
As manifolds go, you're got the easiest to work on:
http://www.******.co.yu/godevil.htm and:
http://www.n5mbm.net/images/jeep11.JPG But if the head of bolt is
rounded due the use of poor quality tools then you'll have to drill it
out.
It is normal for the bolts to be threaded all the way into the
water jacket.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mark Schimmer -de- wrote:
>
> Hi group,
>
> a friend of mine has a M201 Jeep, early 50's, made by Hotchkiss, and
> beutifully restored (except some motor parts, obviously).
> The Jeep has a flat four engine, with an exhaust heated intake manifold.
> The car (sorry, the Jeep ;-) ) always ran very sluggish, expecially when the
> weather is hot, and the motor tended to quit under hot conditions and hardly
> started after running (vapor lock?) .
> He found that the flap, which directed the exhaust gases to the
> heaterchamber under the intake manifold, was stuck in the open position
> (full heat). No way to move the darned thing.
> He / we figured that the only way to get that thing going is to remove the
> intake and the exhaust manifold and take everything apart. Soon that action
> got stuck when a few bolts under the exhaust manifold, which are hardly
> reachable, seem to be rusted onto the bolts and are unmovable. One of them
> is already distorted by some former owner. We're afraid that we'll break the
> bolts if too much pressure is applied.
> We have a few questions regarding the whole process:
> - is there any way to get the flap to move without removing the manifolds,
> if possible?
> - is there any trick to remove the manifolds, expecially reaching the nuts
> under the
> exhaust manifold, without having to pull out the motor? Special tool?
> - is it normal, that studs reach into a water chamber? On loosening one
> manifold nut,
> the stud came out with it, and afterwards cooling water shot out of the
> hole.
>
> Any advise is greatly appreciated! This thing has really become a bugger.
>
> Regards,
> Mark

 

Hi Mark,
As manifolds go, you're got the easiest to work on:
http://www.******.co.yu/godevil.htm and:
http://www.n5mbm.net/images/jeep11.JPG But if the head of bolt is
rounded due the use of poor quality tools then you'll have to drill it
out.
It is normal for the bolts to be threaded all the way into the
water jacket.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mark Schimmer -de- wrote:
>
> Hi group,
>
> a friend of mine has a M201 Jeep, early 50's, made by Hotchkiss, and
> beutifully restored (except some motor parts, obviously).
> The Jeep has a flat four engine, with an exhaust heated intake manifold.
> The car (sorry, the Jeep ;-) ) always ran very sluggish, expecially when the
> weather is hot, and the motor tended to quit under hot conditions and hardly
> started after running (vapor lock?) .
> He found that the flap, which directed the exhaust gases to the
> heaterchamber under the intake manifold, was stuck in the open position
> (full heat). No way to move the darned thing.
> He / we figured that the only way to get that thing going is to remove the
> intake and the exhaust manifold and take everything apart. Soon that action
> got stuck when a few bolts under the exhaust manifold, which are hardly
> reachable, seem to be rusted onto the bolts and are unmovable. One of them
> is already distorted by some former owner. We're afraid that we'll break the
> bolts if too much pressure is applied.
> We have a few questions regarding the whole process:
> - is there any way to get the flap to move without removing the manifolds,
> if possible?
> - is there any trick to remove the manifolds, expecially reaching the nuts
> under the
> exhaust manifold, without having to pull out the motor? Special tool?
> - is it normal, that studs reach into a water chamber? On loosening one
> manifold nut,
> the stud came out with it, and afterwards cooling water shot out of the
> hole.
>
> Any advise is greatly appreciated! This thing has really become a bugger.
>
> Regards,
> Mark

 

Hi Mark,
As manifolds go, you're got the easiest to work on:
http://www.******.co.yu/godevil.htm and:
http://www.n5mbm.net/images/jeep11.JPG But if the head of bolt is
rounded due the use of poor quality tools then you'll have to drill it
out.
It is normal for the bolts to be threaded all the way into the
water jacket.
God Bless America, ßill O|||||||O
mailto:-------------------- http://www.----------.com/

Mark Schimmer -de- wrote:
>
> Hi group,
>
> a friend of mine has a M201 Jeep, early 50's, made by Hotchkiss, and
> beutifully restored (except some motor parts, obviously).
> The Jeep has a flat four engine, with an exhaust heated intake manifold.
> The car (sorry, the Jeep ;-) ) always ran very sluggish, expecially when the
> weather is hot, and the motor tended to quit under hot conditions and hardly
> started after running (vapor lock?) .
> He found that the flap, which directed the exhaust gases to the
> heaterchamber under the intake manifold, was stuck in the open position
> (full heat). No way to move the darned thing.
> He / we figured that the only way to get that thing going is to remove the
> intake and the exhaust manifold and take everything apart. Soon that action
> got stuck when a few bolts under the exhaust manifold, which are hardly
> reachable, seem to be rusted onto the bolts and are unmovable. One of them
> is already distorted by some former owner. We're afraid that we'll break the
> bolts if too much pressure is applied.
> We have a few questions regarding the whole process:
> - is there any way to get the flap to move without removing the manifolds,
> if possible?
> - is there any trick to remove the manifolds, expecially reaching the nuts
> under the
> exhaust manifold, without having to pull out the motor? Special tool?
> - is it normal, that studs reach into a water chamber? On loosening one
> manifold nut,
> the stud came out with it, and afterwards cooling water shot out of the
> hole.
>
> Any advise is greatly appreciated! This thing has really become a bugger.
>
> Regards,
> Mark