20v BT - which oil pump?
05-09-2022, 04:30 PM
Post: #1
20v BT - which oil pump?
Hi folks!

I'm rebuilding a 20v blacktop for my AE86. Was wondering what is involved in changing to the silvertop timing belt/tensioner, as I understand it is less problematic than the hydraulic tensioner of the BT. Also, the timing belt is about half the price of the blacktop. I have two oil pumps; the original BT pump (engine spun a bearing so it would be no harm to discard that), and a 16v type - which looks very clean & may not have seen much abuse. I also have a new genuine pump gear set.

Is there anything I need to be aware of when doing this? Also, the previous tensioner was welded/brazed onto the dowel on the pump Huh but I've since ground that off and the dowel came off with it!
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05-12-2022, 03:43 PM
Post: #2
20v BT - which oil pump?
the dowel is important for the tensioner....

If you really want to run a silvertop type pump , I'd recommend you just buy a new Aisin OPT-036. I would recommend a few drops of assembly lube inside it before assembly.

Dan -

You can |Sad .... OR you can ask for help!!!

OST Porting service - http://hachiroku.net/forums/showthread.php?t=19991
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05-29-2022, 02:34 PM
Post: #3
20v BT - which oil pump?
(05-09-2022 04:30 PM)Mylesmck Wrote:  Hi folks!

I'm rebuilding a 20v blacktop for my AE86. Was wondering what is involved in changing to the silvertop timing belt/tensioner, as I understand it is less problematic than the hydraulic tensioner of the BT. Also, the timing belt is about half the price of the blacktop. I have two oil pumps; the original BT pump (engine spun a bearing so it would be no harm to discard that), and a 16v type - which looks very clean & may not have seen much abuse. I also have a new genuine pump gear set.

Is there anything I need to be aware of when doing this? Also, the previous tensioner was welded/brazed onto the dowel on the pump Huh but I've since ground that off and the dowel came off with it!

i recommend to see this video: https://www.youtube.com/watch?v=HwCchrZI...ng4answers

http://www.ae86rd.com
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06-03-2022, 12:49 PM
Post: #4
20v BT - which oil pump?
Yeah thanks Chacaman, I've seen that video. Unfortunately it doesn't mention the tensioner and I've already got a later gearset to install into the pump housing

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06-21-2022, 04:51 PM
Post: #5
20v BT - which oil pump?
Pick up the OEM part number for BT and search the AISIN pumps (OEM supplier) half the price
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