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Toymods » General Car Talk » Who said 7M, had no potential?? Show: Today's Posts  :: Show Polls  Email to friend

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MS-75 Regular Location: Adelaide Registered: June 2002	very interesting............ Tue, 30 March 2004 06:19 AH HA-The 7m is a great motor-but as we all know there is the ever present bone of contention associated with them "The Head Gasket Issue". It is something that has always bugged me about the 7M, and all the m series. I know some stalwarts will say there isn't a problem-but the reality is that they do blow far more regularly than other motors. Having a look at the bolt spacings and general arrangement of the head, there doesn't seem to be any obvious reason for it, however something I have found with the 5M/4M heads in particular is that they have a tendency to go "soft". This seems to happen when the engines get a bit warm and screw up the temper. In the 5M's you can see it easily as the posts on the head where the rocker gear mounts begin to squash/collapse. This can be fixed but it requires someone capable of properly annealing and hardening the head again. (very few places are capable of this properly.) I have often wondered if this problem is common to the later M's (it would be assuming the same metal was used.) The reason I say this is because in the specs of the motor posted earlier it mentions a "hardened and annealed" head. Perhaps this has remedied the gasket problem. To me, this points to the M's being flawed not by design, but perhaps a poor material selection. Maybe this is the root of the problem and by hardening and annealing it eliminates the problem. They obviously have some success (a slight understatement...)considering the boost levels it's running. What do you guys think? Sean Damn inpressive motor!!!! [Report message to a moderator]

	Subject	Poster	Date
	Who said 7M, had no potential??	KOFFEE-BLACK	Mon, 29 March 2004 12:15
	Re: Who said 7M, had no potential??	ed_ma61	Mon, 29 March 2004 14:03
	Re: Who said 7M, had no potential??	STR8 2.8	Mon, 29 March 2004 14:20
	Re: Who said 7M, had no potential??	bbaacchhyy	Mon, 29 March 2004 22:16
	Re: Who said 7M, had no potential??	lumpy	Mon, 29 March 2004 23:37
	Re: Who said 7M, had no potential??	bbaacchhyy	Tue, 30 March 2004 02:00
	Re: Who said 7M, had no potential??	Norbie	Tue, 30 March 2004 03:51
	Re: Who said 7M, had no potential??	Clown	Tue, 30 March 2004 04:43
	Re: Who said 7M, had no potential??	UUP-46X	Tue, 30 March 2004 00:25
	Re: Who said 7M, had no potential??	draven	Tue, 30 March 2004 02:01
	Re: Who said 7M, had no potential??	bbaacchhyy	Tue, 30 March 2004 02:13
	Re: Who said 7M, had no potential??	KOFFEE-BLACK	Tue, 30 March 2004 06:02
	very interesting............	MS-75	Tue, 30 March 2004 06:19
	Re: very interesting............	Norbie	Tue, 30 March 2004 06:58
	Re: Who said 7M, had no potential??	coronamark2	Tue, 30 March 2004 06:30
	Re: Who said 7M, had no potential??	BlackSupra	Tue, 30 March 2004 07:06
	Re: Who said 7M, had no potential??	torque	Tue, 30 March 2004 09:15
	Re: Who said 7M, had no potential??	DOR-186	Tue, 30 March 2004 09:36
	Re: Who said 7M, had no potential??	twincam_ke20	Tue, 30 March 2004 11:32
	Re: Who said 7M, had no potential??	CussCuss	Thu, 01 April 2004 05:03
	Re: Who said 7M, had no potential??	Caledwvech	Thu, 01 April 2004 05:08
	Re: Who said 7M, had no potential??	lumpy	Thu, 01 April 2004 05:11
	Re: Who said 7M, had no potential??	justcallmefrank	Thu, 01 April 2004 05:50
	Re: Who said 7M, had no potential??	coronamark2	Thu, 01 April 2004 05:52
	Re: Who said 7M, had no potential??	lumpy	Thu, 01 April 2004 06:34
	Re: Who said 7M, had no potential??	Norbie	Thu, 01 April 2004 06:36
	Re: Who said 7M, had no potential??	gianttomato	Thu, 01 April 2004 10:08
	Re: Who said 7M, had no potential??	Allan	Sun, 04 April 2004 11:19
	Re: Who said 7M, had no potential??	gianttomato	Sun, 04 April 2004 13:20
	Re: Who said 7M, had no potential??	Allan	Sun, 04 April 2004 16:18
	Re: Who said 7M, had no potential??	V8_MA61	Sat, 03 April 2004 10:10
	Re: Who said 7M, had no potential??	ed_ma61	Sun, 04 April 2004 12:39
	Re: Who said 7M, had no potential??	alwaysRA23	Sun, 04 April 2004 13:46
	Re: Who said 7M, had no potential??	nitephyre	Sat, 10 April 2004 00:03
	Re: Who said 7M, had no potential??	7M-Brisbane	Sun, 11 April 2004 03:12

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