Heat Riser
#1
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Heat Riser
I thought GM had done away with heat risers. Well, my '84 T/A has one & I will have to keep lubricated until, maybe next spring, when I can lift the car to remove the riser and then remove the butterflies.
#2
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Car: Yes
Engine: Usually
Transmission: Sometimes
Axle/Gears: Behind me somewhere
Re: Heat Riser
I cut the shaft with a wizz wheel, took out the remains, and put 1/8" pipe plugs in the shaft holes.
Then I took a die grinder to the inner diameter, and enlarged it to the full size of the manifold and Y-pipe.
Then I took a die grinder to the inner diameter, and enlarged it to the full size of the manifold and Y-pipe.
The following 2 users liked this post by sofakingdom:
NoEmissions84TA (11-04-2021), T.L. (11-04-2021)
#3
Re: Heat Riser
There used to be a specific heat riser lubricant. Standard Oil (now Amoco) used to have a line of "Atlas" products, so I don't know who actually made it, but it seemed to work well. Back in the day I used it liberally on NoPar engines since they seemed to need it the most. A few squirts, then forcing the weight against the spring back and forth a few times, then a few more squirts, and it would rattle like brand new again for months.
I believe it was very heavily augmented with graphite, copper, aluminum, and molybdenum, so when the carrier/penetrating oil burned off there was something remaining to act as a lubricant - A little like antiseize lubricants.
I believe it was very heavily augmented with graphite, copper, aluminum, and molybdenum, so when the carrier/penetrating oil burned off there was something remaining to act as a lubricant - A little like antiseize lubricants.
#6
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Re: Heat Riser
Next spring, I will remove the heat riser and cut out the butterflies and plug the vacuum line.
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Car: Resto-Mod 1987 IROC-Z Clone
Engine: Alky fed L92 Vortec Twin-Turbo 6.8L
Transmission: My own built/ design 4L80M
Axle/Gears: Custom 12 bolt (4.10:1)
Re: Heat Riser
GM now only refers to the product's original purpose in small print.
#9
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Re: Heat Riser
I had a thick International truck exhaust donut that was the perfect replacement for my heat riser valve,got it a the flea market for a dollar,worked for years until i installed headers.
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