The car had been stored for several years.After cleaning
fuel pump points, distributor points and carburetors as well
as changing ignition coil and capacitor, I still had not
luck bringing the engine back to life. Having removed the
carburetors, I noticed some material that looked like
granulated brown sugar in the intake manifold. After
removing the intake manifold, here is what I found: http://www.jag-lovers.org/v.htm?1321282445
The water ports are clean as you can see. The center fuel
intake port is not as clogged up as the front or the rear.
This residue material is very friable and crumbles very
easily. Has anyone an idea what it could be (fuel gum, fuel
additive residue (lead additive)or…?)and how it could be
removed? I can easily take it out, but as it extends all the
way to the intake valve, I want to be sure I remove all of
it and in a safe manner (for the engine) and also by knowing
what it is, prevent the formation of new material. Thanks
for your insights…–
Chris XJ6C 75, X150 61, XKE 2+2 67, Stype 67
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
Chris;
You’ve got some nasty stuff there. No telling what it is, but here’s how I
would attack:
Remove the intake cam cover, release the cam drive bolts (two or four)
Pull the sprocket forward - Do not allow the crank to be moved during this
entire operation or you will be retiming the engine.
Loosen all of the cam bearing caps and allow the cam to pop up and close all
of the intake valves.
Now you can scrape, vacuum and use whatever solvent will dissolve this
crystalline deposit.
Clean up, wipe up, vacuum/air jet the mess in the ports and out.
Clean up the intake manifold in a like manner.
Bolt the cam back down, install the cam drive plate bolts and wire them.
New gaskets and button up.
This crud may be in the fuel tank as well, so be sure you pull the drain
plug and make sure the tank clean. Check the fuel pump with a small amount
of fuel for function and cleanliness before you try for a start. I like the
cleanliness and lack of corrosion in the water jacket. Good sign.
Bob Grossman-----Original Message-----
From: owner-xk-engine@jag-lovers.org [mailto:owner-xk-engine@jag-lovers.org]
On Behalf Of ChrisGir
Sent: Tuesday, November 15, 2011 6:46 AM
To: xk-engine@jag-lovers.org
Subject: [xk-engine] Clogged up intake port
The car had been stored for several years.After cleaning
fuel pump points, distributor points and carburetors as well
as changing ignition coil and capacitor, I still had not
luck bringing the engine back to life. Having removed the
carburetors, I noticed some material that looked like
granulated brown sugar in the intake manifold. After
removing the intake manifold, here is what I found: http://www.jag-lovers.org/v.htm?1321282445
The water ports are clean as you can see. The center fuel
intake port is not as clogged up as the front or the rear.
This residue material is very friable and crumbles very
easily. Has anyone an idea what it could be (fuel gum, fuel
additive residue (lead additive)or…?)and how it could be
removed? I can easily take it out, but as it extends all the
way to the intake valve, I want to be sure I remove all of
it and in a safe manner (for the engine) and also by knowing
what it is, prevent the formation of new material. Thanks
for your insights…
In reply to a message from Robert Grossman sent Tue 15 Nov 2011:
Thank you Robert. My main concern was not to let any of this
to get into the cylinder chamber and your advise to have the
cam pop-up to close the valves is perfect. I know what this
coming week -end is going to look like. Fuel pump is clean
and running, and nothing in the carburetors. I sure will
drain the tank also.–
Chris XJ6C 75, X150 61, XKE 2+2 67, Stype 67
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
In reply to a message from ChrisGir sent Tue 15 Nov 2011:
Chris
When I purchased my xk120 ots it had been in storage for a number
of years, I cleaned the fuel system, plugs ,points plug leads,etc
etc and got the car going, it ran very well, I used it for 2 years
and had it up to 100 MPH on several runs with hard driving in the
hills.Because it was using oil I decided to strip it down, I found
that the crankshaft had heavy pitting, and the bearings were all
broken away with bits missing, this I learned was caused by acid in
the oil that had been allowed to sit in the engine for a long time.
On your Engine I would pull the cylinder Head to really give it a
good clean,i would also remove the Sump and check the Bearings,
only then will you have a good idea re the Engines Condition. I
trust that this helps.
Regards
Michael Sweeney
1950 xk120 ots
1955 xk140 fhc
1995 xj6–
jagman
–Posted using Jag-lovers JagFORUM [forums.jag-lovers.org]–
–Support Jag-lovers - Donate at http://www.jag-lovers.org/donate04.php –
In reply to a message from ChrisGir sent Tue 15 Nov 2011:
Chris,
That looks like crystalized antifreeze to me, not ethanol residue.
I would be inspecting/pressure testing the manifold to find a
leak. Do you know anything about the history of the engine and how
it was stored ? I would also pay close attention to the oil, if
the engine was run for anytime with an internal coolant leak,
bearing damage is high on the list. Is the oil milky or light
brown ?
If you are only cleaning two ports, you can simply rotate the crank
to close those valves, but Bob’s method will give you more info if
you inspect the cam bearing shell for damage.
Paul–
The original message included these comments:
The car had been stored for several years.After cleaning
fuel pump points, distributor points and carburetors as well
as changing ignition coil and capacitor, I still had not
luck bringing the engine back to life. Having removed the
carburetors, I noticed some material that looked like
granulated brown sugar in the intake manifold. After
removing the intake manifold, here is what I found: http://www.jag-lovers.org/v.htm?1321282445
The water ports are clean as you can see. The center fuel
intake port is not as clogged up as the front or the rear.
This residue material is very friable and crumbles very