diff --git a/modules/change_detection/src/keyvalue_changes.js b/modules/change_detection/src/keyvalue_changes.js
index f43b981e82..f50f82488a 100644
--- a/modules/change_detection/src/keyvalue_changes.js
+++ b/modules/change_detection/src/keyvalue_changes.js
@@ -4,7 +4,6 @@ import {stringify, looseIdentical, isJsObject} from 'facade/lang';
 
 export class KeyValueChanges {
   _records:Map;
-  _map:any;
 
   _mapHead:KVChangeRecord;
   _previousMapHead:KVChangeRecord;
@@ -17,7 +16,6 @@ export class KeyValueChanges {
 
   constructor() {
     this._records = MapWrapper.create();
-    this._map = null;
     this._mapHead = null;
     this._previousMapHead = null;
     this._changesHead = null;
@@ -75,7 +73,6 @@ export class KeyValueChanges {
 
   check(map):boolean {
     this._reset();
-    this._map = map;
     var records = this._records;
     var oldSeqRecord:KVChangeRecord = this._mapHead;
     var lastOldSeqRecord:KVChangeRecord = null;
diff --git a/modules/core/src/compiler/compiler.js b/modules/core/src/compiler/compiler.js
index 64d5dd9299..c78b27abf8 100644
--- a/modules/core/src/compiler/compiler.js
+++ b/modules/core/src/compiler/compiler.js
@@ -49,12 +49,10 @@ export class CompilerCache {
  * the CompilePipeline and the CompileSteps.
  */
 export class Compiler {
-  _templateLoader:TemplateLoader;
   _reader: DirectiveMetadataReader;
   _parser:Parser;
   _compilerCache:CompilerCache;
   constructor(templateLoader:TemplateLoader, reader: DirectiveMetadataReader, parser:Parser, cache:CompilerCache) {
-    this._templateLoader = templateLoader;
     this._reader = reader;
     this._parser = parser;
     this._compilerCache = cache;
diff --git a/modules/core/src/compiler/element_injector.js b/modules/core/src/compiler/element_injector.js
index b6b3e9b3bc..2b9d44df2c 100644
--- a/modules/core/src/compiler/element_injector.js
+++ b/modules/core/src/compiler/element_injector.js
@@ -46,13 +46,11 @@ class TreeNode {
   _head:TreeNode;
   _tail:TreeNode;
   _next:TreeNode;
-  _prev:TreeNode;
   constructor(parent:TreeNode) {
     this._parent = parent;
     this._head = null;
     this._tail = null;
     this._next = null;
-    this._prev = null;
     if (isPresent(parent)) parent._addChild(this);
   }
 
@@ -62,7 +60,6 @@ class TreeNode {
   _addChild(child:TreeNode) {
     if (isPresent(this._tail)) {
       this._tail._next = child;
-      child._prev = this._tail;
       this._tail = child;
     } else {
       this._tail = this._head = child;
@@ -290,7 +287,6 @@ export class ElementInjector extends TreeNode {
   _obj7:any;
   _obj8:any;
   _obj9:any;
-  _view:View;
   _preBuiltObjects;
   _constructionCounter;
   _eventCallbacks;
diff --git a/modules/core/src/compiler/pipeline/compile_control.js b/modules/core/src/compiler/pipeline/compile_control.js
index 6cf6e8d8d3..7a0013e1f2 100644
--- a/modules/core/src/compiler/pipeline/compile_control.js
+++ b/modules/core/src/compiler/pipeline/compile_control.js
@@ -12,14 +12,12 @@ export class CompileControl {
   _steps:List<CompileStep>;
   _currentStepIndex:number;
   _parent:CompileElement;
-  _current:CompileElement;
   _results;
   _additionalChildren;
   constructor(steps) {
     this._steps = steps;
     this._currentStepIndex = 0;
     this._parent = null;
-    this._current = null;
     this._results = null;
     this._additionalChildren = null;
   }
@@ -33,7 +31,6 @@ export class CompileControl {
     for (var i=startStepIndex; i<this._steps.length; i++) {
       var step = this._steps[i];
       this._parent = parent;
-      this._current = current;
       this._currentStepIndex = i;
       step.process(parent, current, this);
       parent = this._parent;
diff --git a/modules/core/src/compiler/selector.js b/modules/core/src/compiler/selector.js
index ed68d8fe1c..a594c5bfa2 100644
--- a/modules/core/src/compiler/selector.js
+++ b/modules/core/src/compiler/selector.js
@@ -94,7 +94,6 @@ export class CssSelector {
  * are contained in a given CssSelector.
  */
 export class SelectorMatcher {
-  _selectables:List;
   _elementMap:Map;
   _elementPartialMap:Map;
   _classMap:Map;
@@ -102,8 +101,6 @@ export class SelectorMatcher {
   _attrValueMap:Map;
   _attrValuePartialMap:Map;
   constructor() {
-    this._selectables = ListWrapper.create();
-
     this._elementMap = MapWrapper.create();
     this._elementPartialMap = MapWrapper.create();
 
diff --git a/modules/core/src/compiler/shadow_dom_emulation/content_tag.js b/modules/core/src/compiler/shadow_dom_emulation/content_tag.js
index 91e62dcb74..47fc62836a 100644
--- a/modules/core/src/compiler/shadow_dom_emulation/content_tag.js
+++ b/modules/core/src/compiler/shadow_dom_emulation/content_tag.js
@@ -78,7 +78,6 @@ class IntermediateContent extends ContentStrategy {
   selector: 'content'
 })
 export class Content {
-  _element:Element;
   select:string;
   _strategy:ContentStrategy;
 
diff --git a/modules/core/src/compiler/viewport.js b/modules/core/src/compiler/viewport.js
index 52f598b76a..51ca5bb239 100644
--- a/modules/core/src/compiler/viewport.js
+++ b/modules/core/src/compiler/viewport.js
@@ -11,7 +11,6 @@ export class ViewPort {
   templateElement: Element;
   defaultProtoView: ProtoView;
   _views: List<View>;
-  _viewLastNode: List<Node>;
   _lightDom: any;
   elementInjector: ElementInjector;
   appInjector: Injector;