Topic: Intake manifold's backing (baffle) plate

[AU Finger]

Cast iron is relatively soft material.  These spline drive rivets are easily driven in with a medium sized ball peen hammer.

[Bob Gaines]

Cast iron is relatively soft material.  These spline drive rivets are easily driven in with a medium sized ball peen hammer.

+1 . If you don't care if you dent up the round surface of the rivet it doesn't matter much . The cover on the underside of the manifold is one of those places where it doesn't matter IMO.  I use the proper anvil tool because I am typically installing them on the valve cover sparkplug clip (Cobra fined covers) which is highly visible and I don't want to mar the head of the rivet. 

[MustangAndFairlane1867]

Bob:  Where can I buy 4 of the spline drive "rivets" and the correct anvil tool?  Thanks, Ron...

[Bob Gaines]

Bob:  Where can I buy 4 of the spline drive "rivets" and the correct anvil tool?  Thanks, Ron...

AMK on the rivets and I made my tool but I am sure tool company's make them. FYI you would really only need the tool on high visibility rivets IMO.

[MustangAndFairlane1867]

Well, got the baffle off the underside of my intake today.  I used the large chisel and baby sledge hammer recommended here and it went well for the first two spiral rivets, but took the heads off the other two which were "frozen" in place.  Shouldn't be a problem since I plan to drill and tap the holes for threaded allen button heads anyway.  As I look at it now the trickiest part of the task will be locating the exact center of the two broken rivet studs (they broke off flush with the bottom of the intake) so I can accurately drill out the holes.  Below are some pictures of the project I took this afternoon.  Ron

[Hipo giddyup]

Nice job!!