diff --git a/packages/ember-htmlbars/lib/hooks/component.js b/packages/ember-htmlbars/lib/hooks/component.js
index 46e1cc3f1ff..6cb90739a40 100644
--- a/packages/ember-htmlbars/lib/hooks/component.js
+++ b/packages/ember-htmlbars/lib/hooks/component.js
@@ -101,7 +101,6 @@ export default function componentHook(renderNode, env, scope, _tagName, params,
     // Invoking a component from the outside (either via <foo-bar> angle brackets
     // or {{foo-bar}} legacy curlies).
 
-    console.log(`HASH TO CNM`, attrs);
     var manager = ComponentNodeManager.create(renderNode, env, {
       tagName,
       params,
diff --git a/packages/ember-htmlbars/lib/keywords/closure-component.js b/packages/ember-htmlbars/lib/keywords/closure-component.js
index 1f357bd7e6a..008d4a8eeeb 100644
--- a/packages/ember-htmlbars/lib/keywords/closure-component.js
+++ b/packages/ember-htmlbars/lib/keywords/closure-component.js
@@ -7,6 +7,7 @@ import { symbol } from 'ember-metal/utils';
 import BasicStream from 'ember-metal/streams/stream';
 import { read } from 'ember-metal/streams/utils';
 import { labelForSubexpr } from 'ember-htmlbars/hooks/subexpr';
+import assign from 'ember-metal/assign';
 
 export const COMPONENT_REFERENCE = symbol('COMPONENT_REFERENCE');
 export const COMPONENT_CELL = symbol('COMPONENT_CELL');
@@ -51,7 +52,9 @@ function createClosureComponentCell(env, originalComponentPath, params, hash) {
   if (componentPath && componentPath[COMPONENT_CELL]) {
     val = {
       [COMPONENT_PATH]: componentPath[COMPONENT_PATH],
-      [COMPONENT_PARAMS]: []
+      [COMPONENT_PARAMS]: mergeParams(componentPath[COMPONENT_PARAMS], params),
+      [COMPONENT_HASH]: mergeHash(componentPath[COMPONENT_HASH], hash),
+      [COMPONENT_CELL]: true
     };
   } else {
     val = {
@@ -64,3 +67,19 @@ function createClosureComponentCell(env, originalComponentPath, params, hash) {
 
   return val;
 }
+
+export function mergeParams(original, update) {
+  // If update has the same or more items than original, we can just return the
+  // update
+  if (update.length >= original.length) {
+    return update;
+  } else {
+    let result = update.slice(0);
+    result.push(...original.slice(update.length));
+    return result;
+  }
+}
+
+export function mergeHash(original, updates) {
+  return assign(original, updates);
+}
diff --git a/packages/ember-htmlbars/lib/keywords/element-component.js b/packages/ember-htmlbars/lib/keywords/element-component.js
index f3b8835f3ed..30ccfc3fc26 100644
--- a/packages/ember-htmlbars/lib/keywords/element-component.js
+++ b/packages/ember-htmlbars/lib/keywords/element-component.js
@@ -4,6 +4,8 @@ import {
   COMPONENT_PATH,
   COMPONENT_PARAMS,
   COMPONENT_HASH,
+  mergeHash,
+  mergeParams
 } from  './closure-component';
 
 export default {
@@ -48,12 +50,8 @@ function render(morph, env, scope, [path, ...params], hash, template, inverse, v
 
   if (path && path[COMPONENT_REFERENCE]) {
     let closureComponent = env.hooks.getValue(path);
-    console.log(`PARAMS`, params, closureComponent[COMPONENT_PARAMS]);
     params = mergeParams(closureComponent[COMPONENT_PARAMS], params);
-    console.log(params);
-    console.log(`HASH`, hash, closureComponent[COMPONENT_HASH]);
     hash = mergeHash(closureComponent[COMPONENT_HASH], hash);
-    console.log(hash);
   }
 
   // If the value passed to the {{component}} helper is undefined or null,
@@ -68,15 +66,3 @@ function render(morph, env, scope, [path, ...params], hash, template, inverse, v
     params, hash, templates, visitor
   );
 }
-
-function mergeParams(...paramsArray) {
-  let mergedParams = [];
-  for (let i = 0; i < paramsArray.length; i++) {
-    mergedParams.splice(mergedParams.length, 0, ...paramsArray[i]);
-  }
-  return mergedParams;
-}
-
-function mergeHash(...hashArray) {
-  return assign({}, ...hashArray);
-}
diff --git a/packages/ember-htmlbars/lib/node-managers/component-node-manager.js b/packages/ember-htmlbars/lib/node-managers/component-node-manager.js
index 46f1f0d26cc..ea718392c1f 100644
--- a/packages/ember-htmlbars/lib/node-managers/component-node-manager.js
+++ b/packages/ember-htmlbars/lib/node-managers/component-node-manager.js
@@ -65,9 +65,7 @@ ComponentNodeManager.create = function ComponentNodeManager_create(renderNode, e
     createOptions._controller = getValue(parentScope.getLocal('controller'));
   }
 
-  console.log(`before extractPositionalParams`, component, params, attrs);
   extractPositionalParams(renderNode, component, params, attrs);
-  console.log(`after extractPositionalParams`, component, params, attrs);
 
   // Instantiate the component
   component = createComponent(component, isAngleBracket, createOptions, renderNode, env, attrs);
diff --git a/packages/ember-htmlbars/tests/helpers/closure_component_test.js b/packages/ember-htmlbars/tests/helpers/closure_component_test.js
index ff9298c088f..d3c24e72fdd 100644
--- a/packages/ember-htmlbars/tests/helpers/closure_component_test.js
+++ b/packages/ember-htmlbars/tests/helpers/closure_component_test.js
@@ -131,4 +131,52 @@ if (Ember.FEATURES.isEnabled('ember-contextual-components')) {
     equal(component.$().text(), `Hodi`,
           'greeting is bound');
   });
+
+  QUnit.test('nested components overwrites named positional parameters', function() {
+    let LookedUp = Component.extend();
+    LookedUp.reopenClass({
+      positionalParams: ['name', 'age']
+    });
+    registry.register(
+      'component:-looked-up',
+      LookedUp
+    );
+    registry.register(
+      'template:components/-looked-up',
+      compile(`{{name}} {{age}}`)
+    );
+
+    let template = compile(
+      `{{component
+          (component (component "-looked-up" "Sergio" 28)
+                     "Marvin" 21)
+          "Hodari"}}`
+    );
+    component = Component.extend({ container, template }).create();
+
+    runAppend(component);
+    equal(component.$().text(), 'Hodari 21', '-looked-up component rendered');
+  });
+
+  QUnit.test('nested components overwrites hash parameters', function() {
+    registry.register(
+      'template:components/-looked-up',
+      compile(`{{greeting}} {{name}} {{age}}`)
+    );
+
+    let template = compile(
+      `{{component (component (component "-looked-up"
+                                  greeting="Hola" name="Dolores" age=33)
+                              greeting="Hej" name="Sigmundur")
+                    greeting=greeting}}`
+    );
+    component = Component.extend({ container, template, greeting: 'Hodi' }).create();
+
+    runAppend(component);
+
+    equal(component.$().text(), 'Hodi Sigmundur 33', '-looked-up component rendered');
+  });
+
+  // Avoid assertions
+  // Add tests for bound properties
 }