Im stumped

Reply Subscribe

Thread Tools

Search this Thread

Jun 9, 2014 | 04:21 PM

Beeterolds

Thread Starter

On The Tree

Joined: Jul 2011

Posts: 126

Likes: 0

From: Akron Ohio

Im stumped

I scored a set of Summit Racings 1.8 full roller rockers for my 5.3 and while I had to change my valve springs anyways I figured I would swap these in as well.

Long story short these rockers use factory fasteners and are non adjustable. I went to start my car yesterday and it wont even idle. I put a vacuum gauge on it and it had 0 inches of vaccuum and low vacuum at a higher RPM obviously indicating a massive vacuum leak. Which im thinking these rockers are holding the valves open.

Anyone ever run into this nonsense? If all else fails I might just toss my factory hardware on

Jun 9, 2014 | 04:35 PM

forcd ind

TECH Veteran

iTrader: (7)

Joined: Sep 2007

Posts: 4,188

Likes: 292

From: woodbine, md

what is the preload on the lifters

Jun 9, 2014 | 04:52 PM

Beeterolds

Thread Starter

On The Tree

Joined: Jul 2011

Posts: 126

Likes: 0

From: Akron Ohio

Quote:

Originally Posted by forcd ind

what is the preload on the lifters

I haven't measure that yet... But I think thats where I'm about to find out

Jun 9, 2014 | 10:46 PM

Beeterolds

Thread Starter

On The Tree

Joined: Jul 2011

Posts: 126

Likes: 0

From: Akron Ohio

I toss my stock rockers back on and the engine runs great.. Apparently the 1.8s load the lifters up something terrible. I may have to shim them or run a different pushrod.