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oldcorollas Forums Junkie Location: Kita-Ku, Sapporo, Japan Registered: January 2003	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict Tue, 08 June 2004 01:29 well.... normal operation for bearings is where they have an oil film between journal and the soft metal.. the two should never come into contact. the ways they can come into comtact are by losing oil pressure (and losing the oil film that prevents contact), or by over-revving or possibly bad detonation, where the forces on the piston and rod are large enough to physically break thru the oil film and push the bearing onto the journal.. once you have made metal to metal contact, wear is instant... the soft metal is soft to try to maintain the journal integrity if contact is made. the more wear you get, the larger the clearances are, and a higher volume of oil (possibly at higher pressure) is required to maintain the protective oil film. in your case, once the bearing was partially rooted, either the oil galleries to No.1 are either blocked (possibly by the worn bearing material itself), or they are too small to provide the amount of oil needed, or your oil pump is not sufficient to provide the flow needed (by fuggered bearing clearances) [edit... and higher rpm sheds oil faster from bearings, coupled with higher loading, requiring both higher volume and pressure to begin with.. multiplied by excessive bearign clearances] in my KE15 when i take hard right hand corners, i see the oil presure suddenly drop from 60psi to 20-30psi as air gets picked up by the pump (no baffling at all).. left hand corners are fine. oil pressure gauges are veeery useful Cya, Stewart [Updated on: Tue, 08 June 2004 01:34] [Report message to a moderator]

	Subject	Poster	Date
	Bad Rattle in head area (see included movies) -- what we are doing now	RobST162	Fri, 04 June 2004 05:06
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	oldcorollas	Fri, 04 June 2004 05:27
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	IRA11Y	Fri, 04 June 2004 05:38
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	thechuckster	Fri, 04 June 2004 08:56
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	Allan	Fri, 04 June 2004 10:20
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	RobST162	Fri, 04 June 2004 12:30
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	allencr	Fri, 04 June 2004 15:16
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	deesonet	Fri, 04 June 2004 23:36
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	spectral	Sat, 05 June 2004 00:23
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	RobST162	Sat, 05 June 2004 01:20
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	Toobs	Sat, 05 June 2004 01:26
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	RobST162	Sat, 05 June 2004 01:31
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	RobST162	Sat, 05 June 2004 05:15
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	toynado	Sat, 05 June 2004 06:42
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	YelloRolla	Sat, 05 June 2004 07:06
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	RobST162	Sat, 05 June 2004 07:57
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	ae86drift	Sat, 05 June 2004 08:42
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	IRA11Y	Sat, 05 June 2004 09:36
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	toynado	Sat, 05 June 2004 18:33
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	BlackSupra	Sun, 06 June 2004 07:09
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	DiZ_	Sun, 06 June 2004 12:40
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	RobST162	Mon, 07 June 2004 00:55
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	IRA11Y	Mon, 07 June 2004 01:09
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	RobST162	Mon, 07 June 2004 01:13
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	Lambolica	Mon, 07 June 2004 01:17
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	YelloRolla	Sun, 06 June 2004 07:21
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	HighRolla	Sun, 06 June 2004 09:41
	Re: Bad Rattle in head area (see included movie) any ideas? pleeeeze help I am desparate	sik sx	Sun, 06 June 2004 12:27
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	allencr	Mon, 07 June 2004 13:43
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	Alainve	Mon, 07 June 2004 14:45
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	RobST162	Mon, 07 June 2004 14:58
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	oldcorollas	Mon, 07 June 2004 15:33
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	RobST162	Mon, 07 June 2004 23:07
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	gianttomato	Mon, 07 June 2004 23:15
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	RobST162	Mon, 07 June 2004 23:19
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	oldcorollas	Tue, 08 June 2004 01:29
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	Matt-AE86	Wed, 09 June 2004 11:24
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	THE WITZL	Tue, 08 June 2004 12:59
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	RobST162	Tue, 08 June 2004 13:21
	Re: Bad Rattle in head area (see included movies) any ideas? the final verdict	RobST162	Wed, 09 June 2004 08:39
	Re: Bad Rattle in head area (see included movies) -- what we are doing now	BlackSupra	Wed, 09 June 2004 08:40
	Re: Bad Rattle in head area (see included movies) -- what we are doing now	RobST162	Wed, 09 June 2004 08:49
	Re: Bad Rattle in head area (see included movies) -- what we are doing now	ae86drift	Wed, 09 June 2004 09:11
	Re: Bad Rattle in head area (see included movies) -- what we are doing now	sik sx	Wed, 09 June 2004 11:04

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