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Nokkenas vervangen hoe? : Techniek

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Het is nu 23 nov 2024, 07:17

Nokkenas vervangen hoe?

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Nokkenas vervangen hoe?

Berichtdoor Lode96 » 20 feb 2020, 01:02

Beste leden

Mijn nokkenas en tuimelaars aan vooral de passagierszijde van mijn V8 tonen wat slijt en zullen stilletjes vervangen moeten worden.
Distributie heb ik zo'n klein 10k geleden gedaan.
Mijn vraag is nu, hoe vervang je zo'n nokkenas? aangezien deze enkel naar achterkan uitschuiven?
- Moet je de nokkenaslagerhuizen/torens lossen en dus ook die kopbouten?
- Of beter het blok eruit takelen en zo de nokkenas eruit schuiven?
- Of heeft er iemand een andere manier??

Ik hoor het graag want voor dit vond ik niet echt how to…

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Re: Nokkenas vervangen hoe?

Berichtdoor Leeflang » 20 feb 2020, 03:10

Optie 1 is goed.
Inclusief de lagers dus, de cilinderkoppen zitten gelukkig met andere bouten aan de motor.
Wel eerst de kleppenstoter hevels er uit halen.
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Re: Nokkenas vervangen hoe?

Berichtdoor Lode96 » 20 feb 2020, 10:26

Dank u voor de antwoorden!

Maar de buitenste bouten van de lagerhuizen zijn toch rekbouten die tot in het onderblok gaan, moeten deze dan niet vervangen worden?
Want die ter hoogte van cilinder 4 en 8 zitten op een ambetante plek met die firewall, lijken niet zo gemakkelijk te lossen...
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Re: Nokkenas vervangen hoe?

Berichtdoor Leeflang » 20 feb 2020, 16:46

Het werkplaatshandboek meldt niets over rekbouten voor de lagers of de cilinderkoppen.

De achterste lagers worden nog wel apart vermeld.
De bouten daarvan kunnen wel losgedraaid worden, maar die bouten verwijderen kan pas als het lager verwijderd is.
Na het losdraaien van alle lagers eerst de nokkenas uit het achterste lager trekken.
Daarna kan ook het achterste lager verwijderd worden.
Bij het terugplaatsen moeten de bouten van het achterste lager ook eerst in het lager geplaatst worden, voordat het lager teruggeplaatst wordt, anders krijg je de bouten er niet meer in.
Zal wel even wat friemelen worden, maar het kan zonder de hele motor te moeten verwijderen.
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Re: Nokkenas vervangen hoe?

Berichtdoor Frank117 » 20 feb 2020, 21:13

Ik heb wel eens een olielek veroorzaakt door een nokkenas van een V8 te vervangen.
Juist doordat één rij bouten door de kop in het motorblok zitten. De koppakking had het opgegeven.
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