OST-049: 1G-GTE

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oldeskewltoy
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OST-049: 1G-GTE

Postby oldeskewltoy » Fri May 18, 2018 12:09 pm

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Well, I've worked a 5MG, and 7MGTE, now it's time to work their little brother, a 1G-GTE


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The 1G-GTE is a 2 liter inline 6 cylinder that made 210hp. The 1G-GTE uses a 75mm bore, and 75mm stroke, as a comparison, the 4AG uses 81mm bore and 77mm stroke.


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Anyone see anything??



more to come....... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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User avatar
oldeskewltoy
Club4AG MASTER
Posts: 1721
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-049: 1G-GTE

Postby oldeskewltoy » Sat May 26, 2018 4:43 pm

oldeskewltoy wrote:
Anyone see anything??






Did you see what the arrows were pointing at? Originally I was worried... that discolor, and shape are common when looking at burnt valves......... but they cleaned up ;)

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Valve sizes: 28mm intake, 23.5mm exhaust. As comparison, the 4AGE uses 30.5mm intake valves, and 25.5mm exhaust valves. Very cute... the 1G-GTE intake valves have both the Yamaha logo, and the "teq" logo, while the exhaust valves just have the "teq" logo.


The head is now back from the shop, it's clean, and pressure checks ok.

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One more step before I begin work...... a new tool

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A new flowbench bore adapter... This one 77mm



more to come...... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 1721
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-049: 1G-GTE

Postby oldeskewltoy » Fri Jun 01, 2018 7:28 am

got it on the bench......

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more to come....... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 1721
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-049: 1G-GTE

Postby oldeskewltoy » Fri Jun 01, 2018 8:14 am

progress(left chamber).......... bowls and seats now @ 85% of valve diameter

Image


more to come....
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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oldeskewltoy
Club4AG MASTER
Posts: 1721
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-049: 1G-GTE

Postby oldeskewltoy » Wed Jun 13, 2018 4:31 pm

got the head back from the machine shop...

3 down.... 3 to go


Image


more to come..... :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

User avatar
oldeskewltoy
Club4AG MASTER
Posts: 1721
Joined: Wed Jan 09, 2013 4:44 pm
Location: Portland, Oregon

Re: OST-049: 1G-GTE

Postby oldeskewltoy » Sat Jun 16, 2018 7:59 pm

Before.... and after - intake side.

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The 1G-GTE uses valves that are about 5mm shorter then 4AG valves... yet the 1G-GTE valve guides are HUGE in comparison. The 1G guides measure out to 45.75mm(1.8"), the 4AG guides 40.65mm(1.6"). so the valve is 5mm shorter, and yet the guide is 5mm longer - so I shortened the guides.




more to come........ :D
OST Cyl head porting, - viewtopic.php?f=22&t=300

Building a great engine takes knowing the end... before you begin :ugeek:

Enjoy Life... its the only one you get!

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