Cowl Top Weld Joint Water Leak TSB 88-02-14 for 88 Bronco & F Series
Source: by Ford via Steve83 (Steve, That dirty old truck) at SuperMotors.net
TSB 88-02-14 Cowl Top Weld Joint Water Leak
Publication Date: JANUARY 20, 1988
LIGHT TRUCK: 1988 F-SERIES, BRONCO
ISSUE: Water entering the passenger compartment of the vehicle while driving in the rain may be caused by inadequate sealing of the cowl top weld joint. The leak cannot be diagnosed using a normal water test with a hose.
ACTION: To correct this, seal the cowl top inner to outer weld joint using the following service procedure.
1. Loosen hood hinge bolts on hood.
2. Position hood all the way forward and tighten bolts to hold it in position.
3. Remove cowl top grille and tape edges of cowl access opening.
4. Remove bolts from wiper pivot shaft assembly.
5. Reaching through the access hole in the cowl top outer panel, apply a bead of Ford Clear Silicone Sealer, D6AZ-19562-AA, to the cowl top weld joint.
NOTE: A SMALL MIRROR MAY BE HELPFUL TO SEE THE WELD JOINT.
6. Remove tape from cowl access opening.
7. Install bolts that hold wiper pivot shaft assembly.
8. Reinstall the cowl top grille.
9. Realign hood assembly.
PART NUMBER PART NAME
D6AZ-19652-AA Ford Clear Silicone Sealer
OTHER APPLICABLE ARTICLES: NONE
WARRANTY STATUS: Eligible Under Basic Warranty Coverage
OPERATION DESCRIPTION TIME
880214A 2.1 Hrs.
Drain Boot; "...The idea is to keep rodents & insects & spiders out of the ventilation system, since its intake is inside the R cowl. The slots/holes in the wiper valance are supposed to keep shit out from up there, but even on trucks with holes, leaves can still slip behind the w/s lower trim & go right down in there. So does all the dust (mud) that gets wiped off the w/s. The rubber drain valve is supposed to be large & flexible enough for the weight of the debris to push it open, but it's not..."
Source: by Steve83 (Steve, That dirty old truck) at FSB
Just remember to clean them out regularly. A good blast from a garden hose down each side of the wiper valance once each year should be enough (unless you park under a deciduous tree), but it's not too hard to peel the wheelwells forward & empty them.
The fresh-air intake is the dark hole with the loose bolts beside it. The top opens into the wiper area, and the bottom goes to the rubber cowl drain.
ok, Comcast has slowed us down to pre-93 conn speeds again; so look in my site for more Cowl LINKs @ http://www.broncolinks.com/index.php?index=832