diff --git a/olm/build-manifests.py b/olm/build-manifests.py
index bd20885..5160e86 100755
--- a/olm/build-manifests.py
+++ b/olm/build-manifests.py
@@ -442,7 +442,14 @@ def generate_csv(
 def generate_helm_templates(args: argparse.Namespace) -> list[dict]:
     logging.debug(f"start generate_helm_templates for {args.repo_operator}")
     template_path = args.repo_operator / "deploy" / "helm" / args.repo_operator.name
-    helm_template_cmd = ["helm", "template", args.op_name, template_path]
+    # Path to the default values.yaml used in the operator Helm charts.
+    helm_values_path = template_path / "values.yaml"
+    # Path to the custom values for OLM.
+    olm_values_path = pathlib.Path(__file__).parent / "resources" / "values" / args.repo_operator.name / "values.yaml"
+    helm_template_cmd = ["helm", "template", args.op_name,
+                         "--values", helm_values_path,
+                         "--values", olm_values_path,
+                         template_path]
     try:
         logging.debug("start generate_helm_templates")
         logging.info(f"Running {helm_template_cmd}")
@@ -538,6 +545,7 @@ def quay_image(images: list[tuple[str, str]]) -> list[dict[str, str]]:
         tag_url = (
             f"https://quay.io/api/v1/repository/stackable/{image}/tag?{release_tag}"
         )
+        logging.debug(f"Fetching image manifest from {tag_url}")
         with urllib.request.urlopen(tag_url) as response:
             data = json.load(response)
             if not data["tags"]:
@@ -605,25 +613,18 @@ def write_metadata(args: argparse.Namespace) -> None:
 
 
 def main(argv) -> int:
-    ret = 0
-    try:
-        opts = parse_args(argv[1:])
-        logging.basicConfig(encoding="utf-8", level=opts.log_level)
-
-        # logging.debug(f"Options: {opts}")
+    opts = parse_args(argv[1:])
+    logging.basicConfig(encoding="utf-8", level=opts.log_level)
 
-        manifests = generate_manifests(opts)
+    manifests = generate_manifests(opts)
 
-        logging.info(f"Removing directory {opts.dest_dir}")
-        if opts.dest_dir.exists():
-            shutil.rmtree(opts.dest_dir)
+    logging.info(f"Removing directory {opts.dest_dir}")
+    if opts.dest_dir.exists():
+        shutil.rmtree(opts.dest_dir)
 
-        write_manifests(opts, manifests)
-        write_metadata(opts)
-    except Exception as e:
-        logging.error(e)
-        ret = 1
-    return ret
+    write_manifests(opts, manifests)
+    write_metadata(opts)
+    return 0
 
 
 CSV_DISPLAY_NAME = {
@@ -637,6 +638,7 @@ def main(argv) -> int:
     "kafka": "Stackable Operator for Apache Kafka",
     "nifi": "Stackable Operator for Apache NiFi",
     "opa": "Stackable Operator for the Open Policy Agent",
+    "opensearch": "Stackable Operator for OpenSearch",
     "spark-k8s": "Stackable Operator for Apache Spark",
     "superset": "Stackable Operator for Apache Superset",
     "trino": "Stackable Operator for Trino",
diff --git a/olm/build-manifests.sh b/olm/build-manifests.sh
index 3dc34b4..7173a58 100755
--- a/olm/build-manifests.sh
+++ b/olm/build-manifests.sh
@@ -38,6 +38,10 @@ OPERATOR=""
 MANIFESTS_DIR=""
 METADATA_DIR=""
 
+# Location of the stackable-utils repo.
+# Needed to build path to custom OLM values.yaml files.
+UTILS_REPO_DIR=$(pwd)
+
 generate_metadata() {
 
   # generate metadata
@@ -56,7 +60,7 @@ annotations:
   operators.operatorframework.io.bundle.metadata.v1: metadata/
   operators.operatorframework.io.bundle.package.v1: stackable-${OPERATOR}
 
-  com.redhat.openshift.versions: v4.11-v4.19
+  com.redhat.openshift.versions: v4.18-v4.20
 ANNOS
 
   popd
@@ -75,8 +79,14 @@ generate_manifests() {
     cat "$OP_ROOT/deploy/helm/$OPERATOR/crds/crds.yaml" | yq -s '.spec.names.kind'
   fi
 
-  # expand config map, roles, service account, etc.
-  helm template "$OPERATOR" "$OP_ROOT/deploy/helm/$OPERATOR" | yq -s '.metadata.name'
+  # Expand the Helm chart to individual files by applying both the default values.yaml
+  # and the OLM specific values.yaml.
+  # Each document is saved in file named "{.kind}-{.metadata.name}.yaml" to reduce the number of
+  # name collisions when multiple objects share the same name.
+  helm template "$OPERATOR" \
+  --values "$OP_ROOT/deploy/helm/$OPERATOR/values.yaml" \
+  --values "$UTILS_REPO_DIR/olm/resources/values/$OPERATOR/values.yaml" \
+  "$OP_ROOT/deploy/helm/$OPERATOR" | yq -s '(.kind // "kind-unknown") + "-" + (.metadata.name // "name-unknown")'
   popd
   }
 
@@ -110,6 +120,12 @@ parse_inputs() {
   OPERATOR="$PRODUCT-operator"
   MANIFESTS_DIR="$OPENSHIFT_ROOT/operators/stackable-$OPERATOR/$RELEASE_VERSION/manifests"
   METADATA_DIR="$OPENSHIFT_ROOT/operators/stackable-$OPERATOR/$RELEASE_VERSION/metadata"
+
+  if [ "stackable-utils" != $(basename "$UTILS_REPO_DIR") ]; then
+    echo "ERROR: Looks like you are not calling this script from the base [stackable-utils] repository."
+    echo "ERROR: This is required to properly reference files under the [resources] folder."
+    exit 1
+  fi
 }
 
 maybe_print_help() {
diff --git a/olm/resources/values/airflow-operator/values.yaml b/olm/resources/values/airflow-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/airflow-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/commons-operator/values.yaml b/olm/resources/values/commons-operator/values.yaml
new file mode 100644
index 0000000..178d23e
--- /dev/null
+++ b/olm/resources/values/commons-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 1024Mi
+  requests:
+    memory: 1024Mi
diff --git a/olm/resources/values/druid-operator/values.yaml b/olm/resources/values/druid-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/druid-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/hbase-operator/values.yaml b/olm/resources/values/hbase-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/hbase-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/hdfs-operator/values.yaml b/olm/resources/values/hdfs-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/hdfs-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/hive-operator/values.yaml b/olm/resources/values/hive-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/hive-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/kafka-operator/values.yaml b/olm/resources/values/kafka-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/kafka-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/listener-operator/values.yaml b/olm/resources/values/listener-operator/values.yaml
new file mode 100644
index 0000000..e81975b
--- /dev/null
+++ b/olm/resources/values/listener-operator/values.yaml
@@ -0,0 +1,29 @@
+csiProvisioner:
+  controllerService:
+    resources:
+      limits:
+        memory: 256Mi
+      requests:
+        memory: 256Mi
+
+  externalProvisioner:
+    resources:
+      requests:
+        memory: 128Mi
+      limits:
+        memory: 128Mi
+
+csiNodeDriver:
+  nodeService:
+    resources:
+      limits:
+        memory: 256Mi
+      requests:
+        memory: 256Mi
+
+  nodeDriverRegistrar:
+    resources:
+      requests:
+        memory: 128Mi
+      limits:
+        memory: 128Mi
diff --git a/olm/resources/values/nifi-operator/values.yaml b/olm/resources/values/nifi-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/nifi-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/opa-operator/values.yaml b/olm/resources/values/opa-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/opa-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/opensearch-operator/values.yaml b/olm/resources/values/opensearch-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/opensearch-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/secret-operator/values.yaml b/olm/resources/values/secret-operator/values.yaml
new file mode 100644
index 0000000..6b6eb74
--- /dev/null
+++ b/olm/resources/values/secret-operator/values.yaml
@@ -0,0 +1,30 @@
+controllerService:
+  resources:
+    limits:
+      memory: 256Mi
+    requests:
+      memory: 256Mi
+
+csiNodeDriver:
+  nodeService:
+    resources:
+      limits:
+        memory: 256Mi
+      requests:
+        memory: 256Mi
+
+  externalProvisioner:
+    resources:
+      requests:
+        memory: 128Mi
+      limits:
+        memory: 128Mi
+
+  nodeDriverRegistrar:
+    resources:
+      requests:
+        memory: 128Mi
+      limits:
+        memory: 128Mi
+
+
diff --git a/olm/resources/values/spark-k8s-operator/values.yaml b/olm/resources/values/spark-k8s-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/spark-k8s-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/superset-operator/values.yaml b/olm/resources/values/superset-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/superset-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/trino-operator/values.yaml b/olm/resources/values/trino-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/trino-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi
diff --git a/olm/resources/values/zookeeper-operator/values.yaml b/olm/resources/values/zookeeper-operator/values.yaml
new file mode 100644
index 0000000..2b44159
--- /dev/null
+++ b/olm/resources/values/zookeeper-operator/values.yaml
@@ -0,0 +1,5 @@
+resources:
+  limits:
+    memory: 256Mi
+  requests:
+    memory: 256Mi