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koppakking M103 - advies gevraagd : Techniek

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koppakking M103 - advies gevraagd

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koppakking M103 - advies gevraagd

Berichtdoor adnet » vr feb 10, 2017 4:24 pm

Beste forumleden,

Omdat mijn 300TE al een tijdje last had van keiharde koelvloeistofslangen heb ik deze week de cilinderkop eraf gehaald.
Oorzaak bleek een doorgeslagen koppakking tussen de vijfde en zesde cilinder.
Koppakking was ook helemaal verrot en vergaan dus echt tijd voor een nieuwe.
oude kopakking 1.JPG
oude kopakking 1.JPG (608.47 KiB) 1460 keer bekeken

oude kopakking 2.JPG
oude kopakking 2.JPG (509.24 KiB) 1460 keer bekeken

oude kopakking 3.JPG
oude kopakking 3.JPG (482.68 KiB) 1460 keer bekeken

Ik heb de kop laten vlakken en meteen ook de klepzittingen laten inschuren, maar doordat de oude koppakking flink aan het aluminium heeft lopen vreten, is er toch nog een plekje waar ik zo mijn bedenkingen bij heb.
gevlakte cilinderkop.JPG
gevlakte cilinderkop
gevlakte cilinderkop.JPG (552.64 KiB) 1460 keer bekeken

aangetast plekje cilinderkop 1.JPG
aangetast plekje cilinderkop 1.JPG (504.98 KiB) 1460 keer bekeken

aangetast plekje cilinderkop 2.JPG
aangetast plekje cilinderkop 2.JPG (496.46 KiB) 1460 keer bekeken

Ook het gietijzer van het onderblok heeft flink last van putcorrosie tussen de koelkanalen in.
corrosie onderblok 1.JPG
corrosie onderblok 1.JPG (631.97 KiB) 1460 keer bekeken

corrosie onderblok 2.JPG
corrosie onderblok 2.JPG (283.13 KiB) 1460 keer bekeken

Ik vraag me af of de nieuwe koppakking dit wel kan opvangen.
Wie heeft hier ervaring mee ?
Of is het misschien verstandig op de aangevreten plekken wat extra vloeibare pakking aan te brengen ?
Of gaat het materiaal van de koppakking niet samen met vloeibare pakking en is een andere middel beter geschikt ?
Alvast bedankt voor het advies.
adnet
 


Re: koppakking M103 - advies gevraagd

Berichtdoor adnet » zo feb 12, 2017 3:31 pm

Niemand die wat wijze raad kan geven ?
adnet
 


Re: koppakking M103 - advies gevraagd

Berichtdoor BertusBonk » zo feb 12, 2017 4:08 pm

Dit is wel een lastige.

Ik zou het opvullen met lagerlijm van loctite en dan vlak maken en daarna gewoon de pakking monteren.

Geen vloeibare pakking er tussen, dat blijft denk ik niet lang zitten.

Gr. Bert.
BertusBonk
 


Re: koppakking M103 - advies gevraagd

Berichtdoor adnet » zo feb 12, 2017 4:26 pm

Bedankt voor het meedenken Bert.

In die richting had ik nog niet gedacht, proberen het aangetaste deel op te vullen.

Ik heb ook goeie ervaringen met epoxy alu repairstick van wurth, das misschien ook nog wel een optie.
adnet
 


Re: koppakking M103 - advies gevraagd

Berichtdoor Vinnievw » zo feb 12, 2017 6:58 pm

Ik denk dat opvullen niet gaat werken, omdat het betreffende deel is onderworpen aan grote temperatuurwisselingen en dus ook krimpt en uitzet. Ik vrees dat met name de beschadiging aan het onderblok een probleem zal vormen; de kop zou ik sowieso vervangen.
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Re: koppakking M103 - advies gevraagd

Berichtdoor Dannygroot » zo feb 26, 2017 6:25 pm

je kunt een overmaatse koppakking bestellen van rieger
heb ik ook in mijn coupe die had meer putcorrosie als die van jouw en ik heb nergens geen last van
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Re: koppakking M103 - advies gevraagd

Berichtdoor jpp » zo maart 05, 2017 3:28 am

wat is de diepte van de corrosie 0.2 tot 0.5 mm ? nogmaals laten vlakken
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Re: koppakking M103 - advies gevraagd

Berichtdoor the swede » zo maart 05, 2017 3:25 pm

Dit is echt wel redelijk ernstige corrosie. De vraag is een beetje of het sop de kool waard is.
Er zijn heel wat M103's beschikbaar online. Je kan zelfs een redelijke afdanker kopen voor enkele 100'en euros.

Waarom niet eerdre die weg bewandelen?
Ik moet hoogdringend het aantal wagens beginnen verminderen.
the swede
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