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 Write-Up: Replacing Accessory Belt Tensioner

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The Roadmaster
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albertj
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LARRY70GS
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LARRY70GS
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LARRY70GS


Name : Larry
Age : 66
Location : Oakland Gardens, NY
Joined : 2007-01-23
Post Count : 2129
Merit : 148

Write-Up: Replacing Accessory Belt Tensioner - Page 4 Empty
PostSubject: Re: Write-Up: Replacing Accessory Belt Tensioner   Write-Up: Replacing Accessory Belt Tensioner - Page 4 EmptyThu Nov 17, 2022 10:24 am

Riv-Cooling-Syst-Orings

The 24502846 has to be the heater hose connections O ring.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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LARRY70GS
Aficionado
LARRY70GS


Name : Larry
Age : 66
Location : Oakland Gardens, NY
Joined : 2007-01-23
Post Count : 2129
Merit : 148

Write-Up: Replacing Accessory Belt Tensioner - Page 4 Empty
PostSubject: Re: Write-Up: Replacing Accessory Belt Tensioner   Write-Up: Replacing Accessory Belt Tensioner - Page 4 EmptyThu Nov 17, 2022 11:15 am

OK, so looking the thread over, GM 24502375 is the correct O ring for the heater hoses.  It is nearly 22 mm inside diameter.  I ordered 2 from Amazon.

The 24502846 is the O ring for the single nipple on the tensioner that goes into the timing cover.  To summarize, the GM part numbers for the O rings needed are,


24502375 for the two heater hoses (2 needed)

24502846 for the tensioner (1 needed)

15-34066 for each end of the elbow (2 needed)

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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LARRY70GS
Aficionado
LARRY70GS


Name : Larry
Age : 66
Location : Oakland Gardens, NY
Joined : 2007-01-23
Post Count : 2129
Merit : 148

Write-Up: Replacing Accessory Belt Tensioner - Page 4 Empty
PostSubject: Re: Write-Up: Replacing Accessory Belt Tensioner   Write-Up: Replacing Accessory Belt Tensioner - Page 4 EmptySun Nov 27, 2022 2:50 pm

So I finally got all the O rings I needed for the job. I took my time and it went well with just one snag. I couldn't get one of the heater hose fittings off the old tensioner. I hit it with liquid wrench, tapped it with a hammer, but it wouldn't budge. The other one twisted off, but lower one, no go. I ended up undoing the pinch clamp on the hose, and worked it loose and off. I then removed the tensioner. I put it in a vice and carefully hack sawed a slim section of the tensioner around the fitting. That enabled me to spread it a bit, and I was able to twist it out with a pair of vice grips. The O rings were flat, and I could barely tell they were there. I picked them out with an awl, and cleaned the fittings. Popped the new O rings on, brushed some grease on them, and they slid in and sealed. I used new GM O rings on the Dorman aluminum elbow, and they sealed as well. No leaks. I am a happy camper.

_________________
98 Riviera SC3800  All stock except gutted air box.
1970 Buick GS455 Stage1, TSP built 470BBB, 602HP/589TQ
Best MPH, 116.06 MPH, Best ET, 11.54
https://www.youtube.com/watch?v=UHCda-t_Jls
https://www.youtube.com/watch?v=sfT2tEO4XcU
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PostSubject: Re: Write-Up: Replacing Accessory Belt Tensioner   Write-Up: Replacing Accessory Belt Tensioner - Page 4 Empty

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