heater hose clip bolt/screw M6 x 1 x 25 - 15653669? - Chevy Impala SS Forum
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  • 1 Post By Ken Hennessy
 
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post #1 of 5 (permalink) Old 07-01-2019, 09:13 PM Thread Starter
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heater hose clip bolt/screw M6 x 1 x 25 - 15653669?

OK. Seeing as how the heater hoses are so close tot he serpentine belt it makes sense that there is something constraining the heater hoses. However, this bolt/screw was not in place on my FleetwoodEstateWagon and my heater hose got a hole in it. The replacement hose is doing the same thing. So, before I put the nice, new hoses I have on, I figured I would find the bolt to constrain the hoses so I don't have to worry about it again. Before I began replacing the hoses I called the local Buick/Cadillac/GMC dealer. Of course, they told me they didn't have the bolt, it's been discontinued, only 2 dealers in the US have it. I asked for the part number, 15653669 was the number provided. Before asking for the part number, I was provided with a description of the bolt M6 x 1 x 25. So, I went to Lowe's and got varying lengths of M6 x 1 bolts as I though 1 inch (25 mm) was much longer than the bolt needed to be. When I got back to my car, it seemed like the bolt was threading in - that is, until I pushed on the bolt and the bolt pushed right in. Obviously, if the hole was originally M6 x 1, it has been stripped out at some point. But it is making me wonder if I was actually given the right specs and/or right part number. So, can anyone confirm that the proper bolt is actually M6 x 1 x 25? Or can anyone confirm that I need a different size bolt (i.e. the factory botl was actually a different size)? Are there differences between the Cadillac and Buick parts that make up my wagon? If my alternator bracket has actually been stripped out, has anyone had good luck heli-coiling the bracket (while it's still on the engine? Any 'creative' solutions for constraining the movement of the hoses as a last resort?


What should be a simple fix seemingly always turns into a freakin' ordeal... My next post will be about the difficulties getting a trailer hitch installed (after doing a bit more research)...


Thanks for any insight you can share!
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post #2 of 5 (permalink) Old 07-09-2019, 11:45 AM Thread Starter
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Since nobody seems to know (or is it care?), here's some updated info. I verified with the dealer that M6 x 1 x 25 is indeed the proper bolt - for both a Buick Roadmaster and a Cadillac Fleetwood - so the hole in my alternator bracket must have been stripped out at some point... Anyone happen to have a spare, good alternator bracket laying around?
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post #3 of 5 (permalink) Old 07-12-2019, 10:41 PM
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I looked at a Caprice bracket and it appears you could put a nut on the bolt as it goes all the way through the bracket and it is exposed so it may be possible. That would be easier than replacing the entire accessory bracket.
Ken
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post #4 of 5 (permalink) Old 07-13-2019, 10:23 AM
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Quote:
Originally Posted by Ken Hennessy View Post
I looked at a Caprice bracket and it appears you could put a nut on the bolt as it goes all the way through the bracket and it is exposed so it may be possible. That would be easier than replacing the entire accessory bracket.
Ken
Exactly what I was thinking with the Stripped Bolt hole. You can access the backside and see the end of the bolt as it goes thru the bracket. I would also use a Nylon end Nut so it stays in place.

Another Option if Stripped - Don't bother with a Heli-Coil type of deal. You're dealing with Aluminum Bracket, so why not just get a "Tap" slightly larger than the stripped hole and cut new threads into the bracket. If you don't have a Tap n Die Kit, you can buy individual "Taps" pretty cheap. Going with the next size up in a "SAE" thread may mean less material to cut. The Metal Bracket that is on the hoses "may" need to have the hole opened up slightly to accommodate the larger bolt.

FYI - I'm almost positive that the Bolt that secures the bracket holding the Trans Cooler Lines to the Bottom of the Accessory Bracket is the same bolt.

EDIT - If you do decide to replace the bracket, they can sell for $75 or more. Also the work involved is quite a bit to "replace" due to things to remove. The alty comes off easy but the big concern is the PS Pump and AC unit. The PS Pump hoses would need to be removed from the pump and Then the Pump with it special bracket unbolted from the bracket. The hardest part here is removing the hoses and the Big reservoir return hose may not survive and "could" be a difficult find. The AC Compressor can be unbolted from the bracket without removing the Freon lines and the entire accessory bracket removed from the engine, but the work involved is considerable.

JUST RETAP OR GO WITH A NUT/BOLT SETUP!!

================================================== =============


'95 Caprice SS conversion - Bonny Buckets - 96 Column, Shifter and Console - 3.73 Gear and Herter tune - Z/28 Cluster - Blazer OH Console - Green/Pink bushings - Chromed Impala Wheels - Eibach Springs and Bilstein Shocks - Corvette Engine Dress - the list goes on and still more to do...it never ends.

Last edited by 4DoorSS; 07-13-2019 at 10:34 AM.
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post #5 of 5 (permalink) Old 07-13-2019, 01:37 PM
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While a re-tap of that stripped hole would be the no brainer if you wanted it to be like stock

Otherwise a zip tie would suffice

\'96 BBB 383/T-56
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