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MBKlassiekerclub.nl • lekke koppakking of gescheurde cylinderkop? : Diesel Specifiek - 2
Pagina 2 van 3

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 25 dec 2012, 19:32
door Mark300DT
Hoi de kopbouten zijn rekbouten volgens mij en moet je die vernieuwen.

Govert ?

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 25 dec 2012, 21:51
door Govert
Ook de vacuümpomp werd ergens midden 1980 vervangen door het zuigertype (met één slang) en dus niet met de overgang van type 1 naar type 2. Volgens mij is de motor gemaakt tussen september 1979 en juni 1980.

Het motorbloknummer staat op het motorblok, niet op de kop.

Het markeren van de ketting moet je dan wel op twee plaatsen doen, maar volgens mij is het niet essentieel. Zolang de zuigers en de nokkenas maar goed ten opzichte van elkaar worden teruggezet (nokkenas kan je ook nog 180º verkeerd terugzetten).

De kopbouten zullen wel rekbouten zijn. Die mag je uiteraard vervangen, officieel hoeft het niet vervangen te worden zolang ze niet over een bepaalde lengte zijn. Als je ze hergebruikt, dan moet je ze opmeten. Uiteraard moeten ze goed schoon worden gemaakt.

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 25 dec 2012, 21:51
door Frankie68
ja dat klopt maar ze mogen iets gerekt zijn..
iets is een paar mm
ik heb het wel ergens staan de toelaatbare lengte

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 25 dec 2012, 22:06
door Mark300DT
yep, jullie hebben gelijk ik had dat ook gelezen.

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 26 dec 2012, 12:22
door Arie en Nico
beste

ik zou het niet op een paar tientjes af laten hangen
als je de kop op moment aan het zetten bent
en er breekt een gebruikte bout
dan kan je wel janken

Groet A & N

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 26 dec 2012, 13:52
door Frankie68
ok,

ik ga morgen eens informeren voor die bouten bij Gomez.
heb de kop er nu af..
er zaten wel wat gaten verstopt en de die smalle gleuven in het onderblok zaten ook dicht..
waarschijnlijk is er in het verleden mee gekloot met zo'n pil ofzo..
de pakking zelf was ook erg broos en er zaten wat scheurtjes in
onderblok opgefrist en ontdaan van vuiligheid
het ziet er weer een stuk schoner uit nu..

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 26 dec 2012, 15:16
door Mark300DT
Foto's ???

Hoe zien je cilinderwanden er uit ? en mischien nog speling op een zuiger ?

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 26 dec 2012, 15:46
door Frankie68
die komen vanavond,,
ik ben nu druk bezig ..pluk de dag nu het droog is

in ieder geval geen speling..heb ik gevoeld

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 27 dec 2012, 00:51
door Frankie68
de andere kop zit er op..maar nog zonder bouten.
de langste bouten zijn te lang..146-147mm
hier zijn wat foto's van het spectakel.
ik heb toch dat type 2 kop erop met de snelgloeiers, omdat de voorkamers ook rond zijn, zoals de oude kop..

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 27 dec 2012, 00:56
door Govert
Het zijn misschien wel snelgloeiers, maar zo te zien M18 snelgloeiers. Die heeft MB nooit geleverd, die zijn aftermarket.

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 27 dec 2012, 01:01
door Frankie68
hoi hoi,

ik heb ze in mijn handen gehad ..het zijn toch die dunne (snel)gloeiers..die m18 snelgloeiers zaten in het oude blok
kan ik mijn oude grijze relais ook gebruiken trouwens voor die dunne gloeipitten?
it's worth a try?

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 30 dec 2012, 20:29
door Frankie68
zo,

de "nieuwe" kop zit erop
het monteren ging moeilijker en stressvoller dan het demonteren zeg!
mijn grootste stress momenten waren het aandraaien van de kopbouten.
had de 8 langste bouten nieuw besteld bij gomes en dus aangedraaid volgens de vraagbaak
en de haynes..
40nm
70nm
volgens de volgorde natuurlijk

wat ik supereng vond was het tweemaal 90gr aandraaien met een interval van 10 min.. :huh:
ik kwam niet verder dan 30-40 gradenna 1 keer was dus bang dat ze knapten .
ik heb het voorlopig maar zo gelaten.

ik ben nog niet klaar maar heb de motor in ieder geval een paar keer laten rondgaan via het contactslot
voor de oliecirculatie
de brandstof - werkzaamheden moet ik nog doen,,de verstuivers zaten er in zonder de slangetjes..
het rondgaan klonk vetrouwd..alleen geen brandstof nog en geen voorgloeien (is ook nog niet aangesloten)

morgen verder en hopen dat het goed gaat..

is dat niet 90 gr aandraaien een probleem?

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 30 dec 2012, 20:56
door Mark300DT
Hoi, hoe bepaal je die 90 graden ? is daar een tool voor ?

Ik zag dat de hex bouten met 70 nm 90 nm 10 min en dan 100 nm worden aangetrokken, de dubbele hex bouten idd met
40 nm 70 nm 10 min 90 graden 90 graden.

Moet de kop nog worden na getrokken ? want in de WIS staat dat het niet meer nodig is om ze na te trekken.

Zou dat door het type bouten komen, zeg maar de rek bouten ?

Mark

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 30 dec 2012, 21:08
door Govert
Als je ze niet op tweemaal 90º aandraait, loop je het risico dat de koppakking niet goed afdicht. De 90º doe je bijvoorbeeld door haaks te beginnen:



en recht te eindigen:



Een stukje pijp helpt daar wel bij.

De oude zeskanten moesten inderdaad nagetrokken worden, deze rekbouten niet.

Je hebt ook een gradenboog om exact te kunnen werken.

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 30 dec 2012, 21:12
door Mark300DT
zo aardig stukje pijp :-)

Duidelijke uitleg, bedankt.

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 30 dec 2012, 21:13
door Frankie68
hoi hoi,

maar ik ben zo bang dat er eentje knapt..
die langste bouten zijn nieuw.
de overige heb ik nagemeten en bleven binnen de marge.
ze zijn dubbel hex idd

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 30 dec 2012, 21:18
door Mark300DT
Zou ik ook zijn, zeker als je z'n eind pijp nodig heb :-), maar als de bouten nieuw zijn moeten ze het kunnen hebben.

Kwart slag voor het afbreken stoppen en dat klopt precies, is 90 graden :-)

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 30 dec 2012, 21:32
door Govert
Uiteraard is het wel zaak dat er geen vloeistof staat in de boorgaten en dat de bouten schoon zijn. De schroefdraad van de bout en de onderkant van de kop van de bout moet voorzien van olie. Verder moeten de bouten van hetzelfde type zijn: lange schroefdraad en een verdunning tussen de schroefdraad en de kop.

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 01 jan 2013, 17:59
door Frankie68
hoi hoi,


ik heb de accu opgeladen..en hij startte !
en blijven draaien
ik blij.. :P
ter info:
om617.950 kop op een om617.912 onderblok kan dus (tot zover)
de 1981 nieuwe type gloeiers doen het dus ook met de zilverkleurige type 1relais
mits parralel aangesloten.
zoals een ombouwset m18 snelgloeiers
morgen verder opbouwen en testen op lekkages

dus ik ben er nog niet :dry:

Re: lekke koppakking of gescheurde cylinderkop?

BerichtGeplaatst: 02 mei 2016, 12:06
door Frankie68
hoi, hoi,

ik ben bezig om de kopbouten na te trekken van de 300D
hij lekte wat olie.
volgens de volgorde natuurlijk

maareh, de nokkenas brug cq steunen, met hoeveel nm moeten die vast?
het zijn imbussen

is het 40 nm?

het plaatje is van govert in hilversum