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Author Topic: 2366 ccm type 4 "questions"  (Read 6189 times)
Kiel
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Posts: 99



« on: January 27, 2013, 20:05:25 pm »

 hi.
  Have just taken my engine apart to check up on things before the season.
  How can this happen?.
  That the material from 4 main bearing is ended on the block surface.
  There is nothing to report on bearings or chrankshaft. like new !
  
























 Best regards Thomas kiel
« Last Edit: January 28, 2013, 19:54:03 pm by Kiel » Logged
MeXX
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Posts: 525


World record holder 8.733 @ 255.658


« Reply #1 on: January 27, 2013, 21:12:05 pm »

Dear Thomas

Some pix would be useful

MeXX
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Drag or Die
Kiel
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Posts: 99



« Reply #2 on: January 27, 2013, 21:29:56 pm »

now there are picture,  mexx .
« Last Edit: January 28, 2013, 16:49:40 pm by Kiel » Logged
Kiel
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Posts: 99



« Reply #3 on: January 29, 2013, 18:28:50 pm »

 Huh Huh Huh
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Udo
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« Reply #4 on: January 29, 2013, 19:32:45 pm »

Looks like the case was too big in diameter , needed line boring ??

Udo
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Torben Alstrup
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Posts: 716


« Reply #5 on: January 29, 2013, 20:25:37 pm »

That would be my answer too.
Off to Mr Griebel and get it miced out.

T
PS. How is the wear pattern on the flywheel bearing ? Inside.
« Last Edit: January 29, 2013, 20:27:44 pm by Torben Alstrup » Logged
Kiel
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Posts: 99



« Reply #6 on: January 29, 2013, 21:52:17 pm »

Hi udo.

The case was line boring, when I samplet the engine. BAS.... Will miced it out.

Thanks
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GetBackOnTrack
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Posts: 170



« Reply #7 on: January 31, 2013, 01:57:29 am »

Our cases doesnt last forever Thomas, when we use it as we do (Racing). I have seen what can happen in one season on my own NOS type 4 case(71x105 - 250 hk) Case is at BAS for align bore at the moment. And you have what, two years runs on yours?

It looks like the bearing has been loose and travelled back and fourth inside the case under abusing.

Another thing, everything can allways look fine inside an engine when you take it apart (sometimes not), but when you start to measure things up, things are not allways within spec. Have you checked your cylinders for roundness? Seat surface for the valves? On picture number 1 it looks like the intake valve has suffered some "back fire" wich indicates there might be a leak, unless you ran to tight valve adjustment  Wink

Just some positive input from here  Smiley

Jakob.
« Last Edit: January 31, 2013, 02:08:02 am by GetBackOnTrack » Logged

You need quality machine work done???
Check: gbot.dk
dragvw2180
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Posts: 304



« Reply #8 on: January 31, 2013, 03:13:41 am »

 On picture 6 it looks like the case surface has shuffled , notice what looks like burrs near the oil return groove for the seal. I have never seen that before, anyone else ?  Mike McCarthy
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Torben Alstrup
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« Reply #9 on: February 02, 2013, 19:13:54 pm »

Yeah, I do think that the case through bolts could use a little more torque too.
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dragvw2180
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Posts: 304



« Reply #10 on: February 03, 2013, 01:53:08 am »

 I am asking because I do not know, does anyone shuffle pin all six through bolt holes on type4's and would this help on these cases ?   I ask because on my CB aluminum case ( 6 shuffle pins) the bearings and case have looked like brand new on inspection. Mike McCarthy
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Kiel
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Posts: 99



« Reply #11 on: February 04, 2013, 21:49:50 pm »

Super questions :::::::

Thanks Mike McCarthy
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Frallan
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« Reply #12 on: February 05, 2013, 01:17:23 am »

Raceware through bolts?
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Udo
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« Reply #13 on: February 05, 2013, 12:34:59 pm »

I am asking because I do not know, does anyone shuffle pin all six through bolt holes on type4's and would this help on these cases ?   I ask because on my CB aluminum case ( 6 shuffle pins) the bearings and case have looked like brand new on inspection. Mike McCarthy

I would not recommend 6 shuffle pins. center is enough . But i would always messure after line boring .

Udo
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Kiel
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Posts: 99



« Reply #14 on: February 05, 2013, 16:24:12 pm »

thanks udo. will do that.

Best regards thomas kiel
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Kiel
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Posts: 99



« Reply #15 on: February 06, 2013, 15:18:17 pm »

Raceware through bolts? no.........

I use 10mm x 12,9 steel bolts.

Boxerservice.dk produkt !!!!!
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dragvw2180
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Posts: 304



« Reply #16 on: February 06, 2013, 15:55:46 pm »

  I am trying to understand what caused the damage to the case so I am going to recap what we discovered here . I am sure that when you assembled your engine that you measured (bore guage) the case bore insuring the bore was within specs for the OD of the mains. After doing that you did the same on the crank to ID of the main bearings and compared to OD of crank . 6 Shuffle pins are not needed and the through bolts are up to the task of keeping the case halves secure. So what caused the damage to the bearing saddle and the case half damage ? Is this case scrap because the of the damage to the case half, not the bore ? Again I am trying to learn so I will not make any mistakes . Mike McCarthy
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Udo
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« Reply #17 on: February 06, 2013, 19:50:08 pm »

I am shure it was not correct line bored .

Udo
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Kiel
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Posts: 99



« Reply #18 on: February 06, 2013, 21:28:23 pm »

the case will be measured tomorrow !!!!!!!!!!!!!!!!!!

Best regards thomas kiel.
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dragvw2180
Sr. Member
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Posts: 304



« Reply #19 on: February 06, 2013, 23:12:58 pm »

 I am sorry  I wasn't clear enough, the surface with the burred metal is not part of what is cut on a alignbore, if there is damage there is case scrap  ? Mike McCarthy
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Frallan
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« Reply #20 on: February 08, 2013, 23:00:33 pm »

Raceware through bolts? no.........

I use 10mm x 12,9 steel bolts.

Ahhh, good stuff!
I have used Raceware for 20 years on both studs and through bolts on T2/4 and happy like hell.
Now on the T1 engine I have steel side plates and 12 mm 12,9 through bolts....... :-) It is true.
Prior it was ofcourse shaved on both halves and align bored wiith full torque and plates.
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Kiel
Jr. Member
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Posts: 99



« Reply #21 on: February 18, 2013, 21:02:20 pm »

The block and chrank has now  bin measured.








Best regards

thomas kiel
« Last Edit: February 18, 2013, 21:12:49 pm by Kiel » Logged
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