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BHG fixed..   2004-05-13 16:05:00 <Brett> Hello all, some of you may be aware that i have recently replaced my head gasket and other top end gaskets on my 7M. finished it late last night, fired her up this morning to find it had a bad miss. very noticible at idle and noticible when driving. it is inconsistent which makes me think its not any valve component problems. seems to have a noticible noise coming from the exhaust when it does miss (almost like the start of a backfire). cam sprockets match TDC on crank so i dont believe it is to do with that. I have checked the vacuum hoses and intake manifolds, both of which seem fine. when i was dismantling the head i removed the cam position sensor and didnt make note of its position, could this be a problem?? any ideas/thoughts would be much appreciated.. I also have my members page listed at www.supras.org.nz/members for those of you who are interested. Cheers brett

Re: BHG fixed..   2004-05-13 16:09:00 <Cully Paterson> ----- Original Message ----- From: "Brett" <brestu97@aut.ac.nz> Subject: [sconz] BHG fixed.. > some of you may be aware that i have recently replaced my head gasket and other top >end gaskets on my 7M. finished it late last night, fired her up this morning to find it had >a bad miss. OK, cams: Are you sure you got the dowel in the correct hole? It's possible to get the pin one hole out and have one cam pointing the wrong way. Centre hole should match centre hole. If you undo the bolt on the cam pulley you ought to be able to see enough to work out if they're correct. Cam belt alignment: I take it you've checked that the match marks on the cam pulleys match the slots in the top of the back plate? CPS - if you haven't realigned this properly and checked your timing then that's quite likely your problem. You *need* to check the timing accurately otherwise it'll never run right. You know where to find me if you need to borrow a timing light. Cully

	Re: BHG fixed..   2004-05-13 16:16:00 <Brett> 100% positive the pins on the sprockets are fine, Cambelt is perfectly matched with the sprockets lining up with the mark on the plate behind it and the crank at 0 degrees i have a timing light so ill give that a go and pray that that it be the problem!! Cheers

Re: Re:BHG fixed..   2004-05-13 16:18:00 <Cully Paterson> ----- Original Message ----- From: "Brett" <brestu97@aut.ac.nz> Subject: Re:[sconz] BHG fixed.. > Cambelt is perfectly matched with the sprockets lining up with the mark on the plate behind it and the crank at 0 degrees Have you checked to ensure that your 0° mark is *actually* 0°? Stick a long screw driver down No.1 cylinder and rotate the engine till it's at full elevation - check against crank mark. > i have a timing light so ill give that a go and pray that that it be the problem!! Don't forget to jumper TE1 and E1 while you're doing it. Cully

Re: BHG fixed..   2004-05-13 18:13:00 <Darryn Dewar> Could be an HT lead if they're getting older, they sometimes fray when they're taken out. Just an idea. 13/05/2004 3:53:31 p.m., "Brett" <brestu97@aut.ac.nz> wrote: >Hello all, > >some of you may be aware that i have recently replaced my head gasket and other top end gaskets on my 7M. finished it late last night, fired her up this morning to find it had a bad miss. very noticible at idle and noticible when driving. it is inconsistent which makes me think its not any valve component problems. seems to have a noticible noise coming from the exhaust when it does miss (almost like the start of a backfire). cam sprockets match TDC on crank so i dont believe it is to do with that. > >I have checked the vacuum hoses and intake manifolds, both of which seem fine. when i was dismantling the head i removed the cam position sensor and didnt make note of its position, could this be a problem?? > >any ideas/thoughts would be much appreciated.. > >I also have my members page listed at www.supras.org.nz/members for those of you who are interested. > >Cheers > >brett >--- >Supra Club of New Zealand >http://www.supras.org.nz/ > >

Re: Re:BHG fixed..   2004-05-13 18:24:00 <Adrian - Tapanz.com> might wanna check you have TDC on the compression stroke and not the exhaust stroke too take the cam covers off and the lobes on the cams should be pointing out (away from the centre) @ TDC on #1 ;) i dont know what the dizzy's are like on the 7M's but do they have a gear that drives them of does it go onto the end of the cam shaft? Cheers Adrian ----- Original Message ----- From: "Brett" <brestu97@aut.ac.nz> To: "Supra Club of NZ Mailing List" <sconz@list.supras.org.nz> Sent: Thursday, May 13, 2004 4:13 PM Subject: Re:[sconz] BHG fixed.. > 100% positive the pins on the sprockets are fine, > > Cambelt is perfectly matched with the sprockets lining up with the mark on the plate behind it and the crank at 0 degrees > > i have a timing light so ill give that a go and pray that that it be the problem!! > > Cheers > --- > Supra Club of New Zealand > http://www.supras.org.nz/

RE: Re:BHG fixed..   2004-05-13 18:30:00 <Hunt M> This wouldn't make the problem inconsistent tho would it? -----Original Message----- From: bounce-33619-72@list.supras.org.nz [mailto:bounce-33619-72@list.supras.org.nz] On Behalf Of Adrian - Tapanz.com Sent: Thursday, 13 May 2004 6:23 p.m. To: Supra Club of NZ Mailing List Subject: Re: Re:[sconz] BHG fixed.. might wanna check you have TDC on the compression stroke and not the exhaust stroke too take the cam covers off and the lobes on the cams should be pointing out (away from the centre) @ TDC on #1 ;) i dont know what the dizzy's are like on the 7M's but do they have a gear that drives them of does it go onto the end of the cam shaft? Cheers Adrian ----- Original Message ----- From: "Brett" <brestu97@aut.ac.nz> To: "Supra Club of NZ Mailing List" <sconz@list.supras.org.nz> Sent: Thursday, May 13, 2004 4:13 PM Subject: Re:[sconz] BHG fixed.. > 100% positive the pins on the sprockets are fine, > > Cambelt is perfectly matched with the sprockets lining up with the mark on the plate behind it and the crank at 0 degrees > > i have a timing light so ill give that a go and pray that that it be the problem!! > > Cheers > --- > Supra Club of New Zealand > http://www.supras.org.nz/ --- Supra Club of New Zealand http://www.supras.org.nz/

RE: Re:BHG fixed..   2004-05-13 18:31:00 <Cully Paterson> > -----Original Message----- > From: Adrian - Tapanz.com [mailto:adrian@tapanz.com] > Subject: Re: Re:[sconz] BHG fixed.. > > might wanna check you have TDC on the compression stroke and > not the exhaust stroke too > > take the cam covers off and the lobes on the cams should be > pointing out (away from the centre) @ TDC on #1 ;) You don't need to go that far - just set the engine to TDC and take a look through the oil filler cap. If you can see the lobe of the cam pointing at you then you're on true TDC. > i dont know what the dizzy's are like on the 7M's but do they > have a gear that drives them of does it go onto the end of > the cam shaft? The exhaust cam has a bevel gear just behind the cam pulley and the CPS meshes direct to that. Cully

Re: Re:BHG fixed..   2004-05-13 18:33:00 <Adrian - Tapanz.com> oops yeah.. my bad.. im ha;lf asleep... should have read it several times before talking :/ ----- Original Message ----- From: "Hunt M" <5uprah@supras.co.nz> To: "Supra Club of NZ Mailing List" <sconz@list.supras.org.nz> Sent: Thursday, May 13, 2004 6:29 PM Subject: RE: Re:[sconz] BHG fixed.. > This wouldn't make the problem inconsistent tho would it? > > -----Original Message----- > From: bounce-33619-72@list.supras.org.nz > [mailto:bounce-33619-72@list.supras.org.nz] On Behalf Of Adrian - Tapanz.com > Sent: Thursday, 13 May 2004 6:23 p.m. > To: Supra Club of NZ Mailing List > Subject: Re: Re:[sconz] BHG fixed.. > > might wanna check you have TDC on the compression stroke and not the exhaust > stroke too > > take the cam covers off and the lobes on the cams should be pointing out > (away from the centre) @ TDC on #1 ;) > > i dont know what the dizzy's are like on the 7M's but do they have a gear > that drives them of does it go onto the end of the cam shaft? > > Cheers > Adrian > > > ----- Original Message ----- > From: "Brett" <brestu97@aut.ac.nz> > To: "Supra Club of NZ Mailing List" <sconz@list.supras.org.nz> > Sent: Thursday, May 13, 2004 4:13 PM > Subject: Re:[sconz] BHG fixed.. > > > > 100% positive the pins on the sprockets are fine, > > > > Cambelt is perfectly matched with the sprockets lining up with the mark on > the plate behind it and the crank at 0 degrees > > > > i have a timing light so ill give that a go and pray that that it be the > problem!! > > > > Cheers > > --- > > Supra Club of New Zealand > > http://www.supras.org.nz/ > > > --- > Supra Club of New Zealand > http://www.supras.org.nz/ > > > --- > Supra Club of New Zealand > http://www.supras.org.nz/

	re: BHG fixed..   2004-05-13 23:40:00 <Brett> haha, got 'em!! cam position sensor drive gear not synchronised with TDC and now she is running like a dream!! Cheer

	Re: BHG fixed..   2004-05-13 23:50:00 <Stuart> On Thu, 13 May 2004 23:38, Brett wrote: > haha, > got 'em!! > cam position sensor drive gear not synchronised with TDC > and now she is running like a dream!! Coolness! Take it easy on that new HG.. Did you find the missing wire? as we guessed? Regards, Stuart W.

	Re: BHG fixed..   2004-05-14 17:23:00 <Brett> >Take it easy on that new HG.. just runnning her in for the next month or so :( im just dying to open her up!! >Did you find the missing wire? as we guessed? Yeah, it went to the thermostat like all of those other ones!! Cheers

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