We have had these remanufactured and they are in stock and shipping. GM part # 25526387
New Buick Grand National / T-type belt tensioner. I believe we have sold more of these than any other engine accessory. They are always worn out or get broken replacing the alternator. GM part # 25525338 new pulley is included.
The new reproductions weigh 4.10 lbs. Factory units were 3.70 lbs, better quality materials with today's technology has produced a better quality product.
Tension:
We have used a better quality steel spring material than they had 30 years ago. The factory tension of an OEM tensioner is 19.5 to 20. Ours test at 20.5.
