supra head gasket questions+ rebuild

Andy C · 05-12-2008, 08:17 PM

ok. coulnt time the car on cylinder 6 it wouldnt start ,timed it on 1 again which ran better but still very lumpy. but when i looked under the car the exhaust was glowing red hot almost see through it.

ive played with the cam position sensor moved it around etc while on cylinder 6 and it wont start.

when i had it running on cylinder 1 i took the timing light of 1 and place it on six and the markings moved to 20 past( bottom of the crank pulley) cant adjust without it stalling.

im starting to wonder if the valve timing is out and the guy at the machine shop put the cams in wrong way round??

cant do no more till i find some answers looking to all the people in the know how about timing this vehicle.???

Bill UK · 05-12-2008, 08:56 PM

Ok start at the beginning; drain some of the coolant and remove the top hose, remove the top cam cover to expose the cam pulleys, remove # 1 spark plug and insert a clean rod or clean wooden dowel into the spark plug hole, it needs to be about 12 inches long and ? diameter approx (not too short that you loose it down the hole) turn the crankshaft and watch the rod go up and down. When the rod is at its highest point and the crank pulley is at zero that will be top dead centre. Now check the cam pulleys are aligned with the match marks on the cover, both should be at the top. If they are not, remove the cam belt and reposition them to the correct position. Reinstall the cam belt, remove the CPS and reinstall as stated in the online cygnusx1
MK3 TSRM On-Line

Bill UK · 05-13-2008, 07:39 AM

Another thing worth checking is that cam pulleys are bolted to the camshaft correctly; they should be mounted with the dowel pin in the middle hole. After you have bolted it on and you need to line up the match marks for timing, rotate the pulley and the cam together.

Andy C · 05-13-2008, 06:52 PM

hi bill, still problems was 180 out corrected that and drove round the block this was timed on cylinder 1. cylinder 6 just wont time. still lumpy

cylinder 6 is at the back of the engine number 1 at the front no one else as ever heard of timing on number 6????

did you time number 6 yourself or did someone else do it?

Bill UK · 05-13-2008, 09:03 PM

No one touches the Supra except myself, I've set the timing dozens of times using # 6 as stated in document below. (# 6 is at the back) if you have a variable setting on your strobe light set it at zero. It sounds if you may have a doggie HT lead. Does the timing advance when you remove the terminal link in the diagnosis box.

Bill UK · 05-13-2008, 09:16 PM

Also make sure the arrow on the pick up clip that connects to # 6 HT lead, is pointing towards the spark plug.

Andy C · 05-14-2008, 04:30 AM

yes advances 12 degrees i asked someone else on the forum the same quesrtion micklneye
and he reckons 1 im getting so confused.

05-12-2008, 08:56 PM	#2
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	Ok start at the beginning; drain some of the coolant and remove the top hose, remove the top cam cover to expose the cam pulleys, remove # 1 spark plug and insert a clean rod or clean wooden dowel into the spark plug hole, it needs to be about 12 inches long and ? diameter approx (not too short that you loose it down the hole) turn the crankshaft and watch the rod go up and down. When the rod is at its highest point and the crank pulley is at zero that will be top dead centre. Now check the cam pulleys are aligned with the match marks on the cover, both should be at the top. If they are not, remove the cam belt and reposition them to the correct position. Reinstall the cam belt, remove the CPS and reinstall as stated in the online cygnusx1 MK3 TSRM On-Line Last edited by Bill UK; 05-12-2008 at 08:59 PM.

05-13-2008, 06:52 PM	#4
Andy C 3" Exhaust Join Date: Apr 2008 Location: sudbury suffolk uk Posts: 68	hi bill, still problems was 180 out corrected that and drove round the block this was timed on cylinder 1. cylinder 6 just wont time. still lumpy cylinder 6 is at the back of the engine number 1 at the front no one else as ever heard of timing on number 6???? did you time number 6 yourself or did someone else do it? Last edited by Andy C; 05-13-2008 at 07:24 PM.

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05-12-2008, 08:17 PM	#1
Andy C 3" Exhaust Join Date: Apr 2008 Location: sudbury suffolk uk Posts: 68	ok. coulnt time the car on cylinder 6 it wouldnt start ,timed it on 1 again which ran better but still very lumpy. but when i looked under the car the exhaust was glowing red hot almost see through it. ive played with the cam position sensor moved it around etc while on cylinder 6 and it wont start. when i had it running on cylinder 1 i took the timing light of 1 and place it on six and the markings moved to 20 past( bottom of the crank pulley) cant adjust without it stalling. im starting to wonder if the valve timing is out and the guy at the machine shop put the cams in wrong way round?? cant do no more till i find some answers looking to all the people in the know how about timing this vehicle.???

05-13-2008, 07:39 AM	#3
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	Another thing worth checking is that cam pulleys are bolted to the camshaft correctly; they should be mounted with the dowel pin in the middle hole. After you have bolted it on and you need to line up the match marks for timing, rotate the pulley and the cam together.

05-13-2008, 09:03 PM	#5
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	No one touches the Supra except myself, I've set the timing dozens of times using # 6 as stated in document below. (# 6 is at the back) if you have a variable setting on your strobe light set it at zero. It sounds if you may have a doggie HT lead. Does the timing advance when you remove the terminal link in the diagnosis box.

05-13-2008, 09:16 PM	#6
Bill UK AEM EMS Join Date: Jul 2006 Location: UK Posts: 891	Also make sure the arrow on the pick up clip that connects to # 6 HT lead, is pointing towards the spark plug.

05-14-2008, 04:30 AM	#7
Andy C 3" Exhaust Join Date: Apr 2008 Location: sudbury suffolk uk Posts: 68	yes advances 12 degrees i asked someone else on the forum the same quesrtion micklneye and he reckons 1 im getting so confused.