diff --git a/src/ol/source/tiledebugsource.js b/src/ol/source/tiledebugsource.js
index 79d05fc58e..ae49401d95 100644
--- a/src/ol/source/tiledebugsource.js
+++ b/src/ol/source/tiledebugsource.js
@@ -1,7 +1,6 @@
 goog.provide('ol.source.TileDebug');
 
 goog.require('ol.Tile');
-goog.require('ol.TileCache');
 goog.require('ol.TileCoord');
 goog.require('ol.TileState');
 goog.require('ol.dom');
@@ -89,42 +88,20 @@ ol.source.TileDebug = function(options) {
     tileGrid: options.tileGrid
   });
 
-  /**
-   * @private
-   * @type {ol.TileCache}
-   */
-  this.tileCache_ = new ol.TileCache();
-
 };
 goog.inherits(ol.source.TileDebug, ol.source.Tile);
 
 
-/**
- * @inheritDoc
- */
-ol.source.TileDebug.prototype.canExpireCache = function() {
-  return this.tileCache_.canExpireCache();
-};
-
-
-/**
- * @inheritDoc
- */
-ol.source.TileDebug.prototype.expireCache = function(usedTiles) {
-  this.tileCache_.expireCache(usedTiles);
-};
-
-
 /**
  * @inheritDoc
  */
 ol.source.TileDebug.prototype.getTile = function(z, x, y) {
   var tileCoordKey = this.getKeyZXY(z, x, y);
-  if (this.tileCache_.containsKey(tileCoordKey)) {
-    return /** @type {!ol.DebugTile_} */ (this.tileCache_.get(tileCoordKey));
+  if (this.tileCache.containsKey(tileCoordKey)) {
+    return /** @type {!ol.DebugTile_} */ (this.tileCache.get(tileCoordKey));
   } else {
     var tile = new ol.DebugTile_([z, x, y], this.tileGrid);
-    this.tileCache_.set(tileCoordKey, tile);
+    this.tileCache.set(tileCoordKey, tile);
     return tile;
   }
 };
diff --git a/src/ol/source/tileimagesource.js b/src/ol/source/tileimagesource.js
index 600eb69313..6bdf605cc2 100644
--- a/src/ol/source/tileimagesource.js
+++ b/src/ol/source/tileimagesource.js
@@ -2,7 +2,6 @@ goog.provide('ol.source.TileImage');
 
 goog.require('goog.asserts');
 goog.require('ol.ImageTile');
-goog.require('ol.TileCache');
 goog.require('ol.TileCoord');
 goog.require('ol.TileLoadFunctionType');
 goog.require('ol.TileState');
@@ -50,12 +49,6 @@ ol.source.TileImage = function(options) {
   this.crossOrigin =
       goog.isDef(options.crossOrigin) ? options.crossOrigin : null;
 
-  /**
-   * @protected
-   * @type {ol.TileCache}
-   */
-  this.tileCache = new ol.TileCache();
-
   /**
    * @protected
    * @type {ol.TileLoadFunctionType}
@@ -84,22 +77,6 @@ ol.source.TileImage.defaultTileLoadFunction = function(imageTile, src) {
 };
 
 
-/**
- * @inheritDoc
- */
-ol.source.TileImage.prototype.canExpireCache = function() {
-  return this.tileCache.canExpireCache();
-};
-
-
-/**
- * @inheritDoc
- */
-ol.source.TileImage.prototype.expireCache = function(usedTiles) {
-  this.tileCache.expireCache(usedTiles);
-};
-
-
 /**
  * @inheritDoc
  */
diff --git a/src/ol/source/tilesource.js b/src/ol/source/tilesource.js
index 3457b4cb13..d789f2a643 100644
--- a/src/ol/source/tilesource.js
+++ b/src/ol/source/tilesource.js
@@ -4,6 +4,7 @@ goog.provide('ol.source.TileOptions');
 goog.require('goog.functions');
 goog.require('ol.Attribution');
 goog.require('ol.Extent');
+goog.require('ol.TileCache');
 goog.require('ol.TileRange');
 goog.require('ol.source.Source');
 goog.require('ol.tilecoord');
@@ -64,6 +65,12 @@ ol.source.Tile = function(options) {
    */
   this.tileGrid = goog.isDef(options.tileGrid) ? options.tileGrid : null;
 
+  /**
+   * @protected
+   * @type {ol.TileCache}
+   */
+  this.tileCache = new ol.TileCache();
+
 };
 goog.inherits(ol.source.Tile, ol.source.Source);
 
@@ -71,13 +78,17 @@ goog.inherits(ol.source.Tile, ol.source.Source);
 /**
  * @return {boolean} Can expire cache.
  */
-ol.source.Tile.prototype.canExpireCache = goog.functions.FALSE;
+ol.source.Tile.prototype.canExpireCache = function() {
+  return this.tileCache.canExpireCache();
+};
 
 
 /**
  * @param {Object.<string, ol.TileRange>} usedTiles Used tiles.
  */
-ol.source.Tile.prototype.expireCache = goog.abstractMethod;
+ol.source.Tile.prototype.expireCache = function(usedTiles) {
+  this.tileCache.expireCache(usedTiles);
+};
 
 
 /**
diff --git a/src/ol/source/tileutfgridsource.js b/src/ol/source/tileutfgridsource.js
index 4a58b2bdfa..7a476840f5 100644
--- a/src/ol/source/tileutfgridsource.js
+++ b/src/ol/source/tileutfgridsource.js
@@ -7,7 +7,6 @@ goog.require('goog.events.EventType');
 goog.require('goog.net.Jsonp');
 goog.require('ol.Attribution');
 goog.require('ol.Tile');
-goog.require('ol.TileCache');
 goog.require('ol.TileState');
 goog.require('ol.TileUrlFunction');
 goog.require('ol.extent');
@@ -46,12 +45,6 @@ ol.source.TileUTFGrid = function(options) {
    */
   this.tileUrlFunction_ = ol.TileUrlFunction.nullTileUrlFunction;
 
-  /**
-   * @private
-   * @type {!ol.TileCache}
-   */
-  this.tileCache_ = new ol.TileCache();
-
   /**
    * @private
    * @type {string|undefined}
@@ -64,22 +57,6 @@ ol.source.TileUTFGrid = function(options) {
 goog.inherits(ol.source.TileUTFGrid, ol.source.Tile);
 
 
-/**
- * @inheritDoc
- */
-ol.source.TileUTFGrid.prototype.canExpireCache = function() {
-  return this.tileCache_.canExpireCache();
-};
-
-
-/**
- * @inheritDoc
- */
-ol.source.TileUTFGrid.prototype.expireCache = function(usedTiles) {
-  this.tileCache_.expireCache(usedTiles);
-};
-
-
 /**
  * @return {string|undefined} The template from TileJSON.
  * @api
@@ -195,8 +172,8 @@ ol.source.TileUTFGrid.prototype.handleTileJSONResponse = function(tileJSON) {
 ol.source.TileUTFGrid.prototype.getTile =
     function(z, x, y, pixelRatio, projection) {
   var tileCoordKey = this.getKeyZXY(z, x, y);
-  if (this.tileCache_.containsKey(tileCoordKey)) {
-    return /** @type {!ol.Tile} */ (this.tileCache_.get(tileCoordKey));
+  if (this.tileCache.containsKey(tileCoordKey)) {
+    return /** @type {!ol.Tile} */ (this.tileCache.get(tileCoordKey));
   } else {
     goog.asserts.assert(projection);
     var tileCoord = [z, x, y];
@@ -207,7 +184,7 @@ ol.source.TileUTFGrid.prototype.getTile =
         goog.isDef(tileUrl) ? tileUrl : '',
         this.tileGrid.getTileCoordExtent(tileCoord),
         this.preemptive_);
-    this.tileCache_.set(tileCoordKey, tile);
+    this.tileCache.set(tileCoordKey, tile);
     return tile;
   }
 };
@@ -218,8 +195,8 @@ ol.source.TileUTFGrid.prototype.getTile =
  */
 ol.source.TileUTFGrid.prototype.useTile = function(z, x, y) {
   var tileCoordKey = this.getKeyZXY(z, x, y);
-  if (this.tileCache_.containsKey(tileCoordKey)) {
-    this.tileCache_.get(tileCoordKey);
+  if (this.tileCache.containsKey(tileCoordKey)) {
+    this.tileCache.get(tileCoordKey);
   }
 };