Thank you, you are one of the few people who would know that the blades
bend at high RPM.
I have 3/8" & 1/2" impact wrenches,
but may not have enough air pressure in my compressor.
The other problem is space, do you use a right angle impact wrench ?
The manual mentions removing the water pup pulley,
do I really have to do that ?
Where do I get an original ZR-1 fan from ???
On 6/12/18 12:43 AM, Marc Haibeck wrote:
> Hi Steve,
> We have seen the problem with bent fan blades on other reconditioned
> alternators. The blades bend back the first time the engine is run over
> 6000 rpm. Straightening the blades won't help. They will just bend
> again. We solve the problem by transferring the OE fan to the new
> alternator. It's interesting to note that a L98 or LT1 engine can't rev
> high enough to have this problem.
> There is no need to remove the alternator. It's easy to remove the nut
> with an impact wrench.
> Also, check to see if the pulley is in line with the other pulleys. If
> not the belt may squeak until it warms up.
> At 08:29 PM 6/11/2018, Steve Jasik wrote:
>> 2 weeks ago my 93 ZR-1 started making noise that one observer felt was
>> the rebuilt alternator I had installed 150 miles ago
>> I just removed the fan belt and initially noted that the alternator
>> was "frozen".
>> Upon closer inspection I found out:
>> Marc, George, Rick, ...
>> I figured out what the problem is:
>> The alternator fan blades are scraping against the front of the
>> alternator housing as one can see from the picture.
>> Now that I think about it, when Autozone delivered the replacement
>> alternator it had the L-98 pulley on it and we swapped pullies insted
>> of rejecting it as I never thought that GM would make such a subtle
>> difference in alternators among models,
>> BUT apparently they do as when I looked for C4 Corvette alternators
>> there were different ones for many of the years,
>> Thank you GM :-(
>> Now the fan has one or more broken blades, and I need a special s
>> shaped 15/16" (or 24mm) wrench to get the fan blade off without
>> removing the alternator, if that is a possible solution.
>> Hopefully there is a special shim or such to make for appropriate fan
>> clearance, ...
>> What a F..king PITA for a part that should be standard, ...
>> Is there anyone who knows what the difference between the L98 & LT-5
>> alternators is ???
>> Steve Jasik
>> 1993/ #409
>> TOPICS: TECH or SALOON
>> Problems? Contact ZR1Mom at: [log in to unmask]
>> ZR-1 Store @ http://www.zr1net.net
>> ZR-1 Saloon Keeper
TOPICS: TECH or SALOON
Problems? Contact ZR1Mom at: [log in to unmask]
ZR-1 Store @ http://www.zr1net.net
ZR-1 Saloon Keeper