Headlights

Alignment Procedure

> folks,
>
> I am looking at my right headlight. It is a Wagner lens and the other one is
> a Bosch. -- snip --
>
> I'd like to find a replacement lens, but I am also looking on the 928intl
> site to find that the entire headlight assembly is $125. Surely that is
> something more than I need.
>
> I'm looking only for the lens itself and feel it must be available at a
> local parts store for cheap. Also, there is an H4 and H5 distinction.--snip--
>
> any thoughts? Many thanks in advance.
>
> David Cmelik
> 81 5sp "moosgruenmetallic"

David,

Is it a 7 inch bulb with a ring around it to fill the gap to the outside of the housing, does it say DOT on it and have three alignment dimples sticking out? If yes, it is the "garden variety garbage" US sealed beam, you can purchase it at any auto parts store.

A much better replacment is the 7 inch Hella H4 bulb "off road only" bulb, available at 928 Specialists and other off road shops. This features the Euro pattern and is only about 500 percent better IMHO. H4 bulbs are legal in some states and Canada, and I doubt any police would even know. You can even use "off road" 80W/100W bulbs (vs. std. 60@/80W) to get even better illumination. BE SURE TO ADJUST THEM PROPERLY (see below).

The best and most expensive is upgrade to 8 inch H4s, that are what Euros have. You lose the ring and have full glass. But for about $250 each bulb and frame, that is a pretty penny just for the looks, the Hella 7 inch bulbs have the same pattern.

H5 bulbs used in the the 8 inch US Spec S4 and GTS. The have the same "USgarbage blob" pattern, they just look better. You don't want these.

H4 Alignment Instructions:

Locate the 928 on level ground 25 feet away from a vertical wall. The vertical wall should then be marked:

+ o +
(c) (v) (c)
b------------------------b

where:

+ (c) is the axis, or aim-respective center, of each headlamp.

o (v) is the centerline of the 928.

b-b is a line parallel to and three inches below (c)-(c)

Draw a vertical line through through the center of each (c) point. Do the same with the o (v) point. You now have an accurate plot on the wall of the locations of the headlamps.

(The (c) and (v) designations are for purposes of clarity in this descriptive article. It is not necessary to draw "(c)" and "(v)" on the wall--just plot the points.

2.VERTICAL AIMING

The upper horizontal edge of the low beam light pattern must be directly on line b-b. This will place the upper horizontal edge of the low beam light pattern 3 inches below the centerline of the headlamp at 25 feet with ECE-spec aiming.

3.HORIZONTAL AIMING

The "break point" in the top edge of the low beam light pattern is where the horizontal upper edge of the low beam light pattern begins to rise to the right or steps upwards. Adjust the headlamps so that the break point is within +/- 2 inches of point (c).

After adjusting a high/low beam headlamp in the low beam mode, do not attempt to readjust it in high beam mode. All high/low beam headlamps are meant to be adjusted on the low beam setting only -the high beam adjustment is correct when the low beam adjustment is correct.

Rich