S2000 Under The Hood S2000 Technical and Mechanical discussions.

Banjo Bolt Thread Stripped! Please Help!!!

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Old Feb 26, 2018 | 03:34 AM
  #11  
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Originally Posted by windhund116
Has there been issues with the original oil squirters failing? Man! I'd have second thoughts doing this "upgrade" --- then hitting redline.
It’s nothing to do with them breaking or falling out, that’s the ap1 valve retainers, it’s that Honda upgraded them in mid 02 to a 4 hole design instead of the 2 hole to allow more oil to flow through.
It was done because there was problems with S2’s in Europe driving on the autobahn at such high rpm’s all the time which would cause a lack of oil to lubricate the piston walls and this would cause premature wear on those components. So Europe and other places who have higher speed limits had a recall/product update while places such as North America did not.
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Old Feb 26, 2018 | 03:40 AM
  #12  
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Do the new design actually allow for greater flow or do they just take the same flow to 4 holes vs 2?

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Old Feb 26, 2018 | 03:55 AM
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The oil jet bolt was a RECALL in other parts of the world, but not the USA. They likely summed up (to save their ass) that sustained high speed operation was not a problem in the USA.

They are a must for FI, or SHSO (sustained high speed operation)
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Old Feb 26, 2018 | 10:25 AM
  #14  
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Originally Posted by Billman250
The oil jet bolt was a RECALL in other parts of the world, but not the USA. They likely summed up (to save their ass) that sustained high speed operation was not a problem in the USA.

They are a must for FI, or SHSO (sustained high speed operation)
Originally Posted by MWoolley
It’s nothing to do with them breaking or falling out, that’s the ap1 valve retainers, it’s that Honda upgraded them in mid 02 to a 4 hole design instead of the 2 hole to allow more oil to flow through.
It was done because there was problems with S2’s in Europe driving on the autobahn at such high rpm’s all the time which would cause a lack of oil to lubricate the piston walls and this would cause premature wear on those components. So Europe and other places who have higher speed limits had a recall/product update while places such as North America did not.
Thanks! Amazing, considering Honda has been making very good & reliable high RPM motorcycle racing engines for decades, before the S2000 engine was engineered. Heck their dirt bike 125 and 250cc engines are nearly indestructible.
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Old Feb 26, 2018 | 01:29 PM
  #15  
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Originally Posted by StartMeUp
Is there a thread which details which engine number cut-off for not requiring 4 hole bolt installation ?

Bought '02 suzuka blue w/34,000. Engine #1026693

Any idea at what milage problems arise?

Any help appreciated.
The affected range for the older style oil jet bolts is by VIN, not engine number. The older style banjo oil bolts are present in the following ranges:
JHMAP1***YT000001 - JHMAP1***YT999999
JHMAP1***1T000001 - JHMAP1***1T999999
JHMAP11302T000001 - JHMAP11302T201493

The official Honda dealer service literature in the UK states 'the bolts control the oil to the underside of the pistons... to regulate their operating temperature... we recommend the improved oil jet bolts are fitted as soon as possible'.
They're obviously an improvement and I have changed mine, however most (street) cars seem to do just fine without them hence why it wasn't a world-wide recall.
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Old Feb 26, 2018 | 03:10 PM
  #16  
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Originally Posted by clio
The affected range for the older style oil jet bolts is by VIN, not engine number. The older style banjo oil bolts are present in the following ranges:
JHMAP1***YT000001 - JHMAP1***YT999999
JHMAP1***1T000001 - JHMAP1***1T999999
JHMAP11302T000001 - JHMAP11302T201493

The official Honda dealer service literature in the UK states 'the bolts control the oil to the underside of the pistons... to regulate their operating temperature... we recommend the improved oil jet bolts are fitted as soon as possible'.
They're obviously an improvement and I have changed mine, however most (street) cars seem to do just fine without them hence why it wasn't a world-wide recall.
I'd have to check through the old posts, but I had the last known ap1 engine with upgraded oil jet bolts on this forum. Not that means anything.
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Old Feb 26, 2018 | 07:20 PM
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Good thing you were able to repair it, were you using a 3/8 drive tools? For future reference for any DIYers please use a 1/4 drive wobble socket,long extension and NO ratchet. Screw them in by hand, rotating the extension until you run them down then torque them down to spec.
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Old Feb 26, 2018 | 10:24 PM
  #18  
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Originally Posted by RogueMotorsports
Good thing you were able to repair it, were you using a 3/8 drive tools? For future reference for any DIYers please use a 1/4 drive wobble socket,long extension and NO ratchet. Screw them in by hand, rotating the extension until you run them down then torque them down to spec.
Very good advice. All oil jet bolts are among the MUST hand start fasteners we have at Honda Canada Mfg. engine plant.
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Old Feb 27, 2018 | 02:13 AM
  #19  
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Good work getting that thing fixed. I was a happy man when I read 1029198 on the side of the engine block on my 02.
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Old May 3, 2018 | 09:39 PM
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Bit confused on what numbers i'm looking at to confirm i have the update or not.

Vin- 11462T009972

Engine number- 1029971

I think I do have them? But if someone can confirm, be great. Thanks

Last edited by s2000Junky; May 3, 2018 at 09:41 PM.
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