{"id":126445,"date":"2026-06-22T22:04:12","date_gmt":"2026-06-22T22:04:12","guid":{"rendered":"https:\/\/www.europesays.com\/cz\/126445\/"},"modified":"2026-06-22T22:04:12","modified_gmt":"2026-06-22T22:04:12","slug":"ztraci-se-vam-z-motoru-chladici-kapalina-pak-muze-mit-praskly-blok","status":"publish","type":"post","link":"https:\/\/www.europesays.com\/cz\/126445\/","title":{"rendered":"Ztr\u00e1c\u00ed se v\u00e1m z motoru chladic\u00ed kapalina? Pak m\u016f\u017ee m\u00edt praskl\u00fd blok"},"content":{"rendered":"

Bloku motoru se tak\u00e9 \u0159\u00edk\u00e1 klikov\u00e1 sk\u0159\u00ed\u0148. Spolu s hlavou se jedn\u00e1 o z\u00e1kladn\u00ed a z\u00e1rove\u0148 nejv\u011bt\u0161\u00ed komponent spalovac\u00edho agreg\u00e1tu. A\u010dkoliv to na prvn\u00ed pohled vypad\u00e1, \u017ee se na bloku nem\u00e1 co pokazit, opak m\u016f\u017ee b\u00fdt pravdou.<\/p>\n

Blok spalovac\u00edho motoru je v podstat\u011b takov\u00fd z\u00e1klad, v n\u011bm\u017e je ulo\u017een klikov\u00fd mechanismus, ale tak\u00e9 jsou k n\u011bmu p\u0159ipevn\u011bny n\u011bkter\u00e9 sou\u010d\u00e1sti, nap\u0159\u00edklad chladic\u00ed soustavy, v\u00fdfukov\u00e9 svody u p\u0159epl\u0148ovan\u00fdch motor\u016f oby\u010dejn\u011b s turbodmychadlem a samoz\u0159ejm\u011b je k bloku p\u0159i\u0161roubovan\u00e1 hlava v\u00e1lc\u016f.<\/p>\n

P\u016fvodn\u011b se motorov\u00e9 bloky vyr\u00e1b\u011bly z litiny, zprvu \u0161ed\u00e9, pozd\u011bji z litiny CGI. Tento materi\u00e1l se d\u00e9le udr\u017eel u vzn\u011btov\u00fdch agreg\u00e1t\u016f, kter\u00e9 obecn\u011b vy\u017eaduj\u00ed bloky o n\u011bco robustn\u011bj\u0161\u00ed ne\u017e z\u00e1\u017eehov\u00e9 motory. V\u00fdhodou bylo, \u017ee blok se mohl koncipovat jako takzvan\u00fd monoblok. Tedy bez vlo\u017een\u00fdch v\u00e1lc\u016f (lidov\u011b vlo\u017eek), kdy v\u00e1lce mohli technologov\u00e9 vyvrtat p\u0159\u00edmo do bloku. Litina je toti\u017e pom\u011brn\u011b odoln\u00e1 v\u016f\u010di ot\u011bru, tak\u017ee litinov\u00e9 v\u00e1lce p\u0159irozenou dr\u00e1hu p\u00edst\u016fm.<\/p>\n

\"Kdy\u017e<\/a>Kdy\u017e Japonci experimentovali s keramick\u00fdm motorem na naftu. Obe\u0161el se bez chlazen\u00ed<\/a><\/p>\n

Tlak na sni\u017eov\u00e1n\u00ed hmotnosti, ale tak\u00e9 emis\u00ed p\u0159inesl hlin\u00edkov\u00e9 bloky, kter\u00e9 teoreticky dovoluj\u00ed rychlej\u0161\u00ed oh\u0159\u00e1t\u00ed motoru. A s t\u00edm p\u0159\u00edmo souvisej\u00ed exhalace spalin. D\u00edky hlin\u00edku ztratily motory \u010d\u00e1st sv\u00e9 hmotnosti, co\u017e v p\u0159\u00edpad\u011b p\u0159\u00ed\u010dn\u00e9 z\u00e1stavby vp\u0159edu a pohonu p\u0159edn\u00edch kol prosp\u00edvalo tak\u00e9 j\u00edzdn\u00edm vlastnostem. Hlin\u00edkov\u00fd blok ov\u0161em vy\u017eadoval litinov\u00e9 vlo\u017eky. Zpo\u010d\u00e1tku mokr\u00e9, kter\u00e9 byly om\u00fdv\u00e1ny chladic\u00ed kapalinou (typick\u00e9 pro motory \u0160koda OHV). Pozd\u011bji such\u00e9 nalisovan\u00e9 do v\u00e1lc\u016f vyvrtan\u00fdch v hlin\u00edkov\u00e9m bloku. Pak se za\u010daly litinov\u00e9 v\u00e1lce do bloku vkl\u00e1dat do kokily p\u0159i jeho odl\u00e9v\u00e1n\u00ed.<\/p>\n

Alternativu k litin\u011b p\u0159edstavuj\u00ed r\u016fzn\u00e9 exotick\u00e9 technologie. Litinovou vlo\u017eku lze nahradit tvrdokovov\u00fdm n\u00e1st\u0159ikem (karbidem) na hlin\u00edkov\u00e9 st\u011bny v\u00e1lc\u016f (Nikasil, dnes \u010dasto nep\u0159esn\u011b ozna\u010dovan\u00e9 jako plazma), nebo lze pou\u017e\u00edt na v\u00fdrobu bloku dra\u017e\u0161\u00ed nadeutektickou hlin\u00edkovou slitinu. Ta m\u00e1 zv\u00fd\u0161en\u00fd obsah k\u0159em\u00edku, kter\u00fd po odlept\u00e1n\u00ed (chemick\u00e9m honov\u00e1n\u00ed) hlin\u00edkov\u00e9 vrstvy ve v\u00e1lci vytvo\u0159\u00ed odolnou dr\u00e1hu pro p\u00edsty. Tato metoda vyvinut\u00e1 na za\u010d\u00e1tku 70. let firmou Reynolds Aluminium se p\u016fvodn\u011b jmenovala Acurad, pozd\u011bji od n\u011bmeck\u00e9 firmy KS (Kolben Schmidt) mnohem zn\u00e1m\u011bj\u0161\u00ed Alusil. Pak je\u0161t\u011b existuj\u00ed technologie s\u00a0kompozitov\u00fdmi vlo\u017ekami v\u00e1lc\u016f (Toyota MMC, Honda FRM), ale to u\u017e je skute\u010dn\u00e1 exotika.<\/p>\n

\"T\u011bsn\u011bn\u00ed<\/a>T\u011bsn\u011bn\u00ed hlavy v\u00e1lc\u016f: Um\u00ed zni\u010dit motor! Jak poznat, \u017ee je po\u0161kozen\u00e9?<\/a><\/p>\n

Bez ohledu na pou\u017eitou technologii m\u016f\u017ee i relativn\u011b robustn\u00ed blok z litiny postihnout z\u00e1vada. Nej\u010dast\u011bji deformace nebo prasknut\u00ed. Zdeformovat se m\u016f\u017ee dosedac\u00ed plocha bloku a hlavy v\u00e1lc\u016f (mezi nimi je hlavov\u00e9 t\u011bsn\u011bn\u00ed), ale tak\u00e9 se dok\u00e1\u017ee zkroutit cel\u00fd blok, co\u017e zpravidla postihuje hlin\u00edkov\u00e9 bloky. V extr\u00e9mu m\u016f\u017ee blok dokonce prasknout. Nebo m\u016f\u017ee prasknout tak\u00e9 vlo\u017eka v\u00e1lce. Uveden\u00e9 z\u00e1vady jsou zpravidla na v\u00fdm\u011bnu bloku, v z\u00e1ruce oby\u010dejn\u011b cel\u00e9ho polomotoru (motor bez p\u0159\u00edslu\u0161enstv\u00ed).<\/p>\n

K prasknut\u00ed nebo zkroucen\u00ed bloku m\u016f\u017ee doj\u00edt vinou siln\u00e9ho p\u0159eh\u0159\u00e1t\u00ed. Ale tak\u00e9 t\u0159eba z d\u016fvodu zamrznut\u00ed chladic\u00ed kapaliny, kdy led ve chladic\u00edch kan\u00e1lech zv\u011bt\u0161\u00ed sv\u016fj objem a blok praskne. K prasknut\u00ed ale m\u016f\u017ee doj\u00edt tak\u00e9 \u00fanavou materi\u00e1lu nebo konstruk\u010dn\u00edm nebo technologick\u00fdm pochyben\u00edm v\u00fdrobce.<\/p>\n

\"Jak<\/a>Jak dok\u00e1zalo Porsche chladit motory vzduchem hluboko do 90. let? M\u011blo pomocn\u00edka<\/a><\/p>\n

Praskl\u00fd nebo zkroucen\u00fd blok se projevuje postupn\u00fdm ub\u00fdv\u00e1n\u00edm chladic\u00ed kapaliny nebo tak\u00e9 tlakov\u00e1n\u00edm do vody. Tady z\u00e1le\u017e\u00ed, kde blok praskne a jak moc velk\u00e1 ta prasklina je. Takov\u00e9 auto rovn\u011b\u017e netop\u00ed nebo velmi \u0161patn\u011b. Podle toho, kde a jak blok praskne, se tak\u00e9 \u0159e\u0161\u00ed oprava. Je-li to n\u011bkde uvnit\u0159 bloku, opravit to nejde. I v p\u0159\u00edpad\u011b, \u017ee je k prasklin\u011b p\u0159\u00edstup, ale nen\u00ed oprava v\u016fbec jednoduch\u00e1.<\/p>\n

Nav\u00edc jak p\u0159izn\u00e1vaj\u00ed \u010detn\u00ed servisn\u00ed specialist\u00e9, s nimi\u017e spolupracujeme, mnohdy je to s nejist\u00fdm v\u00fdsledkem. Proto tak\u00e9 k oprav\u011b bloku, i pokud teoreticky mo\u017en\u00e9, p\u0159istupuj\u00ed sp\u00ed\u0161e neradi. Z\u00e1kazn\u00edk\u016fm je toti\u017e \u010dasto velmi obt\u00ed\u017en\u00e9 vysv\u011btlit, jak je mo\u017en\u00e9, \u017ee se z\u00e1vada, za jej\u00ed\u017e opravu zaplatili ne zrovna malou \u010d\u00e1stku (motor je pot\u0159eba demontovat z auta, zcela odstrojit apod.), objevila znovu.<\/p>\n

\"Video<\/p>\n

\n\t\t\t\tNov\u00e1 \u0160koda Fabia 1.4 TDI: \u010cty\u0159i pohledy na v\u011bc \u2022 auto.cz\n\t\t\t<\/p>\n

Zdroj: Jalopnik, Wikipedie, star\u0161\u00ed autorsk\u00e9 \u010dl\u00e1nky<\/p>\n","protected":false},"excerpt":{"rendered":"Bloku motoru se tak\u00e9 \u0159\u00edk\u00e1 klikov\u00e1 sk\u0159\u00ed\u0148. Spolu s hlavou se jedn\u00e1 o z\u00e1kladn\u00ed a z\u00e1rove\u0148 nejv\u011bt\u0161\u00ed komponent…\n","protected":false},"author":2,"featured_media":126446,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_share_on_mastodon":"0"},"categories":[12],"tags":[67,68,768,1455,78,424],"class_list":["post-126445","post","type-post","status-publish","format-standard","has-post-thumbnail","category-byznys","tag-business","tag-byznys","tag-redakcni-video","tag-servis","tag-technika","tag-video"],"share_on_mastodon":{"url":"https:\/\/pubeurope.com\/@cz\/116796028804741691","error":""},"_links":{"self":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/126445","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/comments?post=126445"}],"version-history":[{"count":0,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/posts\/126445\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media\/126446"}],"wp:attachment":[{"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/media?parent=126445"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/categories?post=126445"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.europesays.com\/cz\/wp-json\/wp\/v2\/tags?post=126445"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}