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Alternator Bracketa?
Topic Started: Mar 6 2014, 04:04 PM (854 Views)
Raingutter
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Metro Addict

Concerning the bracket that the bottom of the alternator bolts to, I know that the '94 1.0 and older have a different style which has one less bolt, but are the brackets the same from '95 1.0 and newer? Are the brackets compatible from an '95 and newer 1.3? Basically, I'm looking to replace the one from my '97 1.0 and need to know what other years may have the same style needed. Thanks!
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t3ragtop
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Turbo3 and Twincam Tweaker

g10 engines up to 94 1/2 use the skinnier timing belt and timing gear set that's around 25mm across. the g10 engines from 94 1/2 and up use a timing belt that's 30mm wide (as well as rounded teeth and the cast, spoked cam gear.)

the alternator brackets from the older engines have a different offset than the brackets from the newer engines.

if you mix them up it will cause severe misalignment between the crank and water pump pulleys and the alternator pulley.

on a minor note, the older g10 engines use alternators with pulleys that have 3 grooves. the newest g10 engines and g13 engines use alternators with 4 groove pulleys. i do a witch's brew of parts along with custom brackets and 105 amp alternators from old chevy pickup trucks to do my upgrades. the cs130 alternators have 6 groove pulleys. ;)
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Raingutter
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Thanks t3ragtop. So the brackets should be the same from the '95 to 2000?
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Hanuman
"The Almighty Grounds Cleaner"

hey t-3,
i just bought a 97 metro 3/5.
motor is in great shape other than the plugged pcv valve that blew out my cam seal.

i had just bought a +10 gear (from 3-tech) and a xfi grind (from delta cams) camshaft for the 92 i was building before.

the 97 is now getting the cam, old style +10 cam sprocket, old style crank timing sprocket, and 3 groove crank pulley, alternator pulley and water pump pulley.
just to clarify so i dont screw up, i need to swap alternator brackets too?
and the water pump should need nothing other than pulley change, correct?
Edited by Hanuman, Mar 6 2014, 09:06 PM.
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clarkdw


Raingutter
Mar 6 2014, 08:58 PM
Thanks t3ragtop. So the brackets should be the same from the '95 96' to 2000?
FTFY The wider sprocket and belt coincided with the change to obdII. Every 95 I have seen has the narrow belt.
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Hanuman
"The Almighty Grounds Cleaner"

well, started pulling the alternator and bracket off, i can see that alignment change.
what a pain in the ass to get the bracket off!
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t3ragtop
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Turbo3 and Twincam Tweaker

thanks for the clarification, clark. i haven't owned many of the mk4/5 g10 cars. i just had to dope out a bunch of changes to get the timing belt to match the adjustable cam gears i used on my turbo3 builds. the cs130 alternator mod to accomodate the megasquirt and associated electronics added another dimension of complexity.

honestly, the best way to ensure you have what you need is to use a string to check the alignment of all the pulleys.

i'm not quite sure what to make out of using the older style pulleys on a mk4 g10. doesn't that engine use the crank sensor? if so, that will be rendered useless without using the crank timing gear with the attached star wheel that tickles the crank sensor.
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High MX
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So I should be looking for a 96 and newer Metro to get a 4 -rib crank and water pump pulley? Does it matter if the water pump pulley comes off a 1.3 or 1.0?
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Raingutter
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clarkdw
Mar 6 2014, 09:21 PM
FTFY The wider sprocket and belt coincided with the change to obdII. Every 95 I have seen has the narrow belt.
clarkdw, I actually did find a bracket from a '95 today, but it was from a 1.3. So in theory, all of the '95 1.0's may be the older style while the 1.3's may have the newer style.
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Raingutter
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Hanuman
Mar 7 2014, 02:58 AM
well, started pulling the alternator and bracket off, i can see that alignment change.
what a pain in the ass to get the bracket off!
I wholeheartedly agree about the pain in the ass part :shake :lol
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Raingutter
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High MX
Mar 7 2014, 07:09 AM
So I should be looking for a 96 and newer Metro to get a 4 -rib crank and water pump pulley? Does it matter if the water pump pulley comes off a 1.3 or 1.0?
Watch for some of the '95 and up 1.3's as well for the 4 ribs pulleys. I just tore one off today for my '97.
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Hanuman
"The Almighty Grounds Cleaner"

t3ragtop
Mar 7 2014, 07:00 AM
thanks for the clarification, clark. i haven't owned many of the mk4/5 g10 cars. i just had to dope out a bunch of changes to get the timing belt to match the adjustable cam gears i used on my turbo3 builds. the cs130 alternator mod to accomodate the megasquirt and associated electronics added another dimension of complexity.

honestly, the best way to ensure you have what you need is to use a string to check the alignment of all the pulleys.

i'm not quite sure what to make out of using the older style pulleys on a mk4 g10. doesn't that engine use the crank sensor? if so, that will be rendered useless without using the crank timing gear with the attached star wheel that tickles the crank sensor.
so the part the crank shaft sensor reads is in the crank timing gear?
i thought it was on the crank shaft.
isnt the 96 and up crank shaft different from 95 and older?
also, isnt the crank sensor mounted facing up, not towards the front?
i hope im right.

if not, i read a thread where the owner had spliced the crank sensor wires into the camshaft wires, said it worked because all the computer is looking for is a signal that the engine is turning before spark and fuel are allowed.

"i'm not quite sure what to make out of using the older style pulleys on a mk4 g10.".......i was rebuilding a 92 swift with a 92 metro 3/5 in it. i got a delta cams xfi grind and had mike cove send me a +10 cam gear. ......then i found a 97 metro in great shape for a great deal. im putting the xfi grind cam with the +10 cam gear in this car while replacing the blown out camshaft seal and plugged pcv.
why change everything over to the older style?........because for me to return the gear and have mike make me a new one, its mailing cost each way, and 3-4 weeks shipping each way!

plus the car has a bad tranny, so im replacing the bad 4.39 with the 4.12 (same jump as a xfi car) and adding the xfi grind cam w8ith the +10 sprocket. basically.....a 97 metro xfi...lol :thumb
Edited by Hanuman, Mar 7 2014, 08:32 PM.
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Hanuman
"The Almighty Grounds Cleaner"

Raingutter
Mar 7 2014, 08:14 PM
Hanuman
Mar 7 2014, 02:58 AM
well, started pulling the alternator and bracket off, i can see that alignment change.
what a pain in the ass to get the bracket off!
I wholeheartedly agree about the pain in the ass part :shake :lol
its so stressfull i just want to go outside and jump off the curb!
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