Heater duct doesn't quite reach engine fan shroud
#1
Rennlist Member
Thread Starter
Join Date: Jun 2010
Location: Detroit (Rock City); 1990 C4
Posts: 1,710
Likes: 0
Received 4 Likes
on
4 Posts
Heater duct doesn't quite reach engine fan shroud
I replaced my (rear, plastic) fan shroud not too long ago and since then the heater duct doesn't really reach.
Borrowed photo:
The part labeled Left Heater Duct is too far to the left, and only butts up against the plastic part to the rear of the engine cooling fan.
I seem to remember reading about this, but can't find any info; is there a fix? Do the metal standoffs on the Heater Blower need to be trimmed?
TIA!
Borrowed photo:
The part labeled Left Heater Duct is too far to the left, and only butts up against the plastic part to the rear of the engine cooling fan.
I seem to remember reading about this, but can't find any info; is there a fix? Do the metal standoffs on the Heater Blower need to be trimmed?
TIA!
#3
Rennlist Member
Thread Starter
Join Date: Jun 2010
Location: Detroit (Rock City); 1990 C4
Posts: 1,710
Likes: 0
Received 4 Likes
on
4 Posts
It's apart at the moment (for other reasons) and I'm hoping to find a solution before reassembly
Basically it's as if the duct from the belt driven fan to the main HVAC fan is ~.25" short or the main HVAC fan should be .25" to the right.
If I recall correctly, the previous post I read suggested it was because of 964 parts being superceded by not-quite-the-same 993 parts.
Basically it's as if the duct from the belt driven fan to the main HVAC fan is ~.25" short or the main HVAC fan should be .25" to the right.
If I recall correctly, the previous post I read suggested it was because of 964 parts being superceded by not-quite-the-same 993 parts.
#4
Rennlist Member
I remember reading that you can use a 993 engine fan assembly in a 964, but you have to trim the 2 aluminum spacers, or use the 993 spacers. Could it be that the part you replaced is a 993 part ???
Trending Topics
#9
#10
Rennlist Member
Thread Starter
Join Date: Jun 2010
Location: Detroit (Rock City); 1990 C4
Posts: 1,710
Likes: 0
Received 4 Likes
on
4 Posts
That is it! Unfortunately, I don't have the old housing/bushes, so I'm going to have to trim the ones I do have. It's good to know they're removable.
Thank you, crg53 and g60pops for pointing me in the right direction.
Thank you, crg53 and g60pops for pointing me in the right direction.
#11
Before I knew that is was the spacers being too long my g/friend and I struggled for nearly 3 hours one Sunday afternoon trying to fit the heater duct to the rubber shroud, in the end we gave up after our lower backs had
had enough!
#15
I just measured the cut off bits and I got 4.18mm but I then also filed the main part smooth as the cuts were rough so that is why I put 'around' as I have no way of measuring the amount filed off as it was metal particles.