200ci in france

[L6mustang66]

Hello all,
i'm new there, i'm french and i own a 66 Mustang with a 200ci imported from california in 2010.
The engine is full stock, and i don't know exactly its condition, but it works good on the road.
Since a few days, i earn a noise from the engine.
this noise is a "claclac" and seems to come from the top of the engine,in the rear.
The noise don't change with the RPM, always the same and i can ear it when i drive the car.
Do you have an idea ?
Thk you all.
Best regards.
Alain

 

[69.5Mav]

The noise don't change with the RPM

Dose it speed up with RPM?

If so then it sounds like valve train noise.

I would
Limit driving the car.
Get a new valve cover gasket.
Remove the valve cover.
Inspect the rocker arms and push rods for looseness while turning the crank by hand through at least two revolutions.

If not then I would think about looking at the transmission/torq converter. This not as likely as you state the noise comes from the top of the engine.

By the way welcome. Your english is excelent. My French is terible

 

[L6mustang66]

Thank you for this answer and "awards" for my english :mrgreen:
The noise doesn't change with RPM, or just a little bit.
After a new test this afternoon, with a friend, we are together thinking that this noise is an exhaust leak.
We don't have located the leak at this time.
I have an old thermator exhaust system (not complete and not operational )and may be the leak is on this parts.
i would like to take off definitely this things but i need some caps for holes.

 

[chad]

Welcome to the forum and site, lotta nice experienced folks here.

Some would take a hose - held to the ear w/1 hand and w/the other place near to the exhaust manifold. It serves as a stethiscope for sound location. Not only valves or exhaust make this sound. Glad U have a 2nd party - U 2 listen, the friend to rev the motor gentily. Place the hose around till u hear the noses the loudest. Being out of the driver's seat also facilitates correct location of a sound. Mmm, friend, good; solo - not so good.

Keep postin & we'll add what we can.
Good luck, wont B long now, you'll have it repaired!

 

[ludwig]

Thermator? Do you mean ThermACTOR? That is the air injection system for more complete combustion of exhaust from California. You can plug the holes with brass plugs and pull off the blower/charcoal can/pipes. However, it may change the carburation characteristics. If you want to wake it up a noticeable amount, change out the old ignition for a new electronic ignition. This gives you far more complete combustion in the chamber so you actually see a rise in power.

 

[L6mustang66]

Yes thermactor, sorry for the mistake.
i had pull off all you talk about but i have some steel pipes on the admission that i can't remove cause i don't have something to put in the holes.

 

[ludwig]

Right. The brass plugs. However, they are a standard American thread pitch.

Where in France?

 

[L6mustang66]

Right. The brass plugs. However, they are a standard American thread pitch.

Where in France?

Please, do you ever have a picture that i could use for my shoping ?
I leave in Monthlery, wich is a famous vintage oval speed race track.

 

[ludwig]

http://www.google.com/search?client=saf ... 14&bih=708

Something like the topmost plug in this list from the link. I don't know the exact size. I replaced the whole engine with a non Cali 6. The original was shot.

 

[L6mustang66]

Thank you, this is what i was thinking about, see clearly now.

 

[L6mustang66]

I'm still searching the exhaust leak...impossible to locate it.
The full thermactor system removal is a wrong way, it is not plug on the manifold exhaust.
Anyway the engine turns good, except this fucking noise :mrgreen:

 

[ludwig]

http://www.summitracing.com/search/Bran ... tor-Plugs/

http://everything2.com/title/Thermactor

From the second link:

Disadvantages of the Thermactor include power loss from driving the pump, from increased backpressure in the exhaust system, and greatly increased heat in the exhaust manifolds from the combustion taking place there. Also, it means yet more stuff under the hood and getting in the way of the engine. Although it's technically illegal, it's common for owners of presmog vehicles to remove the Thermactor system and replace the components with those from an unequipped car.

Hope you find the noise.

 

[L6mustang66]

Very interisting, thank you.
Plugs are expensive, i have find some screws in france, same size, but with a head.
Do you think it could be right to use that ? eventualy with a copper seal...

 

[ludwig]

Sure. Use thread seal/cement. Vacuum on the intake side, pressure on the exhaust side.

 

[ludwig]

Check this out. It has a diagram of the California Thermactor system.

http://www.ponytales.org/features/pony- ... ystem.html

The next one is a non-California type (I think).

http://www.mustangbarn.com/68vacuum.html

 

[chad]

Sure. Use thread seal/cement. Vacuum on the intake side, pressure on the exhaust side.

BUT - make sure the threads are the same as those in the motor. Each country has several pitches, counts, etc (ASTM, NPT for here) for all their threads or screws. One U find easily will not likely fit the motor causing a "strip out".

1) make new threads in the motor to fit local threads
/OR/
2) get "plugs" with the right threads.

 

[L6mustang66]

thank you, On this pic you can see how is my engine at the moment.
yellow parts are removed, red are still on the engine.

 

[L6mustang66]

Sure. Use thread seal/cement. Vacuum on the intake side, pressure on the exhaust side.

BUT - make sure the threads are the same as those in the motor. Each country has several pitches, counts, etc (ASTM, NPT for here) for all their threads or screws. One U find easily will not likely fit the motor causing a "strip out".

1) make new threads in the motor to fit local threads
/OR/
2) get "plugs" with the right threads.

yes, i know that, and i have a very good provider, they have all US screws with all threads, different steel quality, and so on.
i bought them some screws for rebuilt my C4 (oil pan, shifter,..)

 

[ludwig]

Right. Those are what you need to plug.

BUT - make sure the threads are the same as those in the motor. Each country has several pitches, counts, etc (ASTM, NPT for here)

I told him already that they were American pitch. He's got the message as you see by his post.

Those Summit plugs ARE quite expensive at $10 each. Still only $60+ all together when you look at it that way.

 

[bubba22349]

I believe that the AIR ports would be a tubing thread.