'89 vs. '90 B230FT & Piston Slap

Oly.850 · Apr 21st, 2010, 04:36

Gents,

I read the 1990 press kit, and it talks about the genereation 3 turbo engine coming out for that year. Do we know when that change really came into production? Other than the smaller turbo turbine and lower rpm cut in, what differences are there vs. the Gen 2?

2nd question, what mileage are you all seeing piston wear severe enough to cause piston slap? Anyone done new rings and/or pistons w/o rebuilding the bottom end? (not that I would, just asking.)

As always, thanks for the thoughts and advice.

1stRaven · Apr 21st, 2010, 07:48

The 3rd gen or late 89 onwards engines had 13mm rods over 9mm in the 2nd gen engines which is the main difference as far as I know though there may be others.

As for high mileage engines, if treated right, i would not expect to get piston slap until 250k+ and even that may be too early.

Clan · Apr 21st, 2010, 08:29

These engines can get piston slap at any time , it happens if you are ever unlucky enough to overheat the engine , Its usualy piston 4 which distrorts and sufffers but never detremental .

johnjp · Apr 22nd, 2010, 09:18

Mine`s on 366k.
I thought I was getting a bit of slap, a ticking noise on start up, however since the last oil change it seems to have resolved.
Just before I had the HG done the bottom end seemed a bit rattly but that also resolved.
These motors are bloody strong!!
I very rarely thrash mine, keeping it around or below 2500rpm most of the time.

Apr 21st, 2010, 04:36	#1
Oly.850 Member Last Online: Sep 27th, 2010 02:10 Join Date: Jan 2008 Location: AnyTown	'89 vs. '90 B230FT & Piston Slap Gents, I read the 1990 press kit, and it talks about the genereation 3 turbo engine coming out for that year. Do we know when that change really came into production? Other than the smaller turbo turbine and lower rpm cut in, what differences are there vs. the Gen 2? 2nd question, what mileage are you all seeing piston wear severe enough to cause piston slap? Anyone done new rings and/or pistons w/o rebuilding the bottom end? (not that I would, just asking.) As always, thanks for the thoughts and advice.

Apr 21st, 2010, 07:48	#2
1stRaven Forum Support Team Last Online: Mar 14th, 2018 13:07 Join Date: Mar 2006 Location: Lincoln View Photos By: 1stRaven	The 3rd gen or late 89 onwards engines had 13mm rods over 9mm in the 2nd gen engines which is the main difference as far as I know though there may be others. As for high mileage engines, if treated right, i would not expect to get piston slap until 250k+ and even that may be too early. __________________ *700R Website*

Apr 21st, 2010, 08:29	#3
Clan Experienced Member Last Online: Yesterday 23:34 Join Date: Jun 2007 Location: L/H side	These engines can get piston slap at any time , it happens if you are ever unlucky enough to overheat the engine , Its usualy piston 4 which distrorts and sufffers but never detremental . __________________ My comments are only based on my opinions and vast experience .

Apr 22nd, 2010, 09:18	#4
johnjp Master Member Last Online: Jan 30th, 2019 22:56 Join Date: Nov 2004 Location: Heathfield, East Sussex View Photos By: johnjp	Mine`s on 366k. I thought I was getting a bit of slap, a ticking noise on start up, however since the last oil change it seems to have resolved. Just before I had the HG done the bottom end seemed a bit rattly but that also resolved. These motors are bloody strong!! I very rarely thrash mine, keeping it around or below 2500rpm most of the time.

Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)