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D90 Heater modification

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90 d90 heater mod
2K views 8 replies 8 participants last post by  Bill Larson 
#1 ·
I have a client who's D90 is in for repairs. One of the things that we're doing is enlarging the heater opening in the bulkhead. I've searched some and found references to it, but haven't found a lot of pictures or other info. If anyone has any info to share, i'd like to hear it. It's relatively easy to see how big the opening could be, but i'm concerned with the seal slipping into the opening. I'm thinking of cutting it in such a way as to allow me to fold the metal into a flange to support the seal. What have you all done?
 
#4 ·
The dash vents are much more restrictive. Without opening those up, I can't believe there will be a measurable different.

The bulkhead hole is 4.5" X 3.25" = 14.6 square inches.
The vents are 1.75" x 2.25" = 7.9 square inches for both.
 
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