Blower Fan Motor Replacement
#1
Basic Sponsor
Rennlist
Site Sponsor
Rennlist
Site Sponsor
Thread Starter
Blower Fan Motor Replacement
There are lots of issues with the HVAC Blower Motor. Most are over 20 years old and they can become noisy or stop working all together. Up until now the only solution was to buy new at circa $600 or buy a used unit with possibly the same issues. Another alternative offered was to modify the body of the blower to accommodate a new motor.
928sRus and friends have developed a “plug and play” solution using a new Bosch blower motor that requires no modification.
Remove the six clips (flat bladed screwdriver) holding the two halves of the body together. Remove the clip holding the electrical box cover in place. Disconnect the two contacts from the motor. Remove the bolt holding the motor into the blower body. Remove the squirrel cage from the splines on the old motor. Replace on the new motor and ensure the shaft is protruding slightly from the bush. Place the motor and cage assembly into the blower body and check that the cage runs smoothly and there is clearance. Assembly is the reverse and you are in business.
Higher speeds and increased flow over the old worn out motor are the benefits.
Price for the new motor is $169.95 plus shipping.
Pictures to be posted later – camera software not compatible with Windows 7.
Some cars 77 to 81 came with an earlier style blower which may or may not accept the new motor. We will try one this week to see if it works. The newer blower is backward compatible with the earlier style.
928sRus and friends have developed a “plug and play” solution using a new Bosch blower motor that requires no modification.
Remove the six clips (flat bladed screwdriver) holding the two halves of the body together. Remove the clip holding the electrical box cover in place. Disconnect the two contacts from the motor. Remove the bolt holding the motor into the blower body. Remove the squirrel cage from the splines on the old motor. Replace on the new motor and ensure the shaft is protruding slightly from the bush. Place the motor and cage assembly into the blower body and check that the cage runs smoothly and there is clearance. Assembly is the reverse and you are in business.
Higher speeds and increased flow over the old worn out motor are the benefits.
Price for the new motor is $169.95 plus shipping.
Pictures to be posted later – camera software not compatible with Windows 7.
Some cars 77 to 81 came with an earlier style blower which may or may not accept the new motor. We will try one this week to see if it works. The newer blower is backward compatible with the earlier style.
__________________
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
Does it have the "Do It Yourself" manual transmission, or the superior "Fully Equipped by Porsche" Automatic Transmission? George Layton March 2014
928 Owners are ".....a secret sect of quietly assured Porsche pragmatists who in near anonymity appreciate the prodigious, easy going prowess of the 928."
#4
I've used a kit from another vendor a few weeks back and it was an ok deal but required a bunch of cutting of the motor housing. Rog and I figured there had to be a better way and bingo, he found the proper replacement.
This is literally pull the old motor out, install new motor and put it all back together. That easy.
This is literally pull the old motor out, install new motor and put it all back together. That easy.
#7
Rennlist Member
I've used a kit from another vendor a few weeks back and it was an ok deal but required a bunch of cutting of the motor housing. Rog and I figured there had to be a better way and bingo, he found the proper replacement.
This is literally pull the old motor out, install new motor and put it all back together. That easy.
This is literally pull the old motor out, install new motor and put it all back together. That easy.
Southwest from Texas to CA is cheap, can I get the "Sean or Roger Installation Option" on that?
Seriously..Norcal could use a dedicated 928 wrench garage...
Trending Topics
#11
Three Wheelin'
Join Date: Dec 2003
Location: Central New Jersey, where 287 and 78 meet.
Posts: 1,656
Likes: 0
Received 2 Likes
on
2 Posts
OK time for maybe an obvious question but here goes anyway.
I just rushed down to take a look at the blower, I can see the forward two clips but not the remaining 4. Taking a quick look at the layout I think I came to the conclusion that the housing needs to somehow come out for this job. Have not even cracked the manual or done a search yet so I might find the answer soon.
Anyone care to chime in on the best way to replace the motor?
I just rushed down to take a look at the blower, I can see the forward two clips but not the remaining 4. Taking a quick look at the layout I think I came to the conclusion that the housing needs to somehow come out for this job. Have not even cracked the manual or done a search yet so I might find the answer soon.
Anyone care to chime in on the best way to replace the motor?
#15
Not the sharpest tool in the shed
Rennlist Member
Rennlist Member
Schocki, Are you going to be in AZ for very long? There is a pretty good crowd of 928 owners here in the Valley. Could possibly meet up with a more sophisticated crowd than those damn Texans.
Roger, any data on what the increased CFM rating is versus the stock fan motor.
Roger, any data on what the increased CFM rating is versus the stock fan motor.