What size is the Balancer nut & Nut fittings connected to the oil pump?

[GNONYX]

Hi all,

I'm in the process of replacing the timing chain, cam sprocket and the crankshaft nylon gear. Can anyone please tell what is the correct wrench size for the balancer nut and also both nut fittings connected to the oil pump? Thanks

 

[Topjimmy]

1 1/8" hex for both the balancer bolt and the oil filter adaptor.

 

[GNONYX]

1 1/8" hex for both the balancer bolt and the oil filter adapter.

Majority of the engine nuts and bolts are metric why would the balancer nut be a std size? My correction, what size are the hoses fitting nuts connected to the oil pump fittings?

 

[pacecarta]

majority of the motor preceeded the 1982 changeover at gm to meteric so most fasteners are sae standard as the tooling was already set up that way
the ones that are meteric are those parts specific to the 86-87 turbo since they were designed and built after 1982 , like the plenum bolts and turbo bolts, accessory bracket stuff
anything into the block was SAE .. oilpan , intake, front cover to block , waterpump , head bolts , valve cover bolts, cam sprocket bolts , flywheel to crank , headers to head , starter to block are all standard
but on those studded head bolts the threads to the block are standard but the threads outside are metric , examples are the stud end on valve cover bolts are metric , the stud end of timing cover bolts to intercooler bracket are metric M8,
the stud end on header bolts are metric m8, the intake boltswith stud ends are m8 to the egr bracket and m10 to the engine hook


if it makes you happy use a metric adjustable wrench for the hoses for the oil cooler , but its easier to just remove the filter and then remove the nut that secures the cooler adapter to the pump

 

[charlief1]

As Paul said, there was a change over but if you were alive in the 70's it was signed into law somewhere in the mid 70's. What the law did was require newly designed parts to be made in metric but because the engine and most of the parts weren't new designs they didn't have to be changed. Something that was a redesign of an old part was allowed to stay standard and that's why some of the cars from the late 70's up have a mix of metric and standard.

 

[GNONYX]

majority of the motor preceeded the 1982 changeover at gm to meteric so most fasteners are sae standard as the tooling was already set up that way
the ones that are meteric are those parts specific to the 86-87 turbo since they were designed and built after 1982 , like the plenum bolts and turbo bolts, accessory bracket stuff
anything into the block was SAE .. oilpan , intake, front cover to block , waterpump , head bolts , valve cover bolts, cam sprocket bolts , flywheel to crank , headers to head , starter to block are all standard
but on those studded head bolts the threads to the block are standard but the threads outside are metric , examples are the stud end on valve cover bolts are metric , the stud end of timing cover bolts to intercooler bracket are metric M8,
the stud end on header bolts are metric m8, the intake boltswith stud ends are m8 to the egr bracket and m10 to the engine hook


if it makes you happy use a metric adjustable wrench for the hoses for the oil cooler , but its easier to just remove the filter and then remove the nut that secures the cooler adapter to the pump

You claimed SAE is being used on oilpan, water pump, valve cover bolts and etcs. Majority all that you describe I have replaced during a spring maintenance, and all nuts and bolts were metrics.

The oil cooler hose coming from the radiator to the oil pump are metric and not SAE since I already try to a using a 13/16 flare wrench and the wrench fitting was loose.

I appreciate your thoughts of using a metric adjustable wrench, and if you ever need a left handed screwdriver I can loan you one.

 

[GNONYX]

As Paul said, there was a change over but if you were alive in the 70's it was signed into law somewhere in the mid 70's. What the law did was require newly designed parts to be made in metric but because the engine and most of the parts weren't new designs they didn't have to be changed. Something that was a redesign of an old part was allowed to stay standard and that's why some of the cars from the late 70's up have a mix of metric and standard.

I appreciate the history of metric and SAE of the 70's, but I still need to know what flare metric wrench size do I need for my 87 GN oil hoses coming from the radiaor to the oil pump?

Can anyone also confirm if the balancer bolt is SAE 1 1/8 or is it metric size? Thanks

 

[charlief1]

The crank/balancer bolt has a 1.125 (1 & 1/8") head on it. Same size as the original design from 1962. Don't know about the cooler lines though.

 

[pacecarta]

You claimed SAE is being used on oilpan, water pump, valve cover bolts and etcs. Majority all that you describe I have replaced during a spring maintenance, and all nuts and bolts were metrics.

its not a claim... its fact
most nuts used are on those studded head bolts and as i posted they are metric

tell me one location where you used a metric that i claim is sae

 

[GNONYX]

its not a claim... its fact
most nuts used are on those studded head bolts and as i posted they are metric

tell me one location where you used a metric that i claim is sae

The following is from your first thread:
anything into the block was SAE .. oilpan , intake, front cover to block , waterpump , head bolts , valve cover bolts, cam sprocket bolts , flywheel to crank , headers to head , starter to block are all standard

but on those studded head bolts the threads to the block are standard but the threads outside are metric , examples are the stud end on valve cover bolts are metric , the stud end of timing cover bolts to intercooler bracket are metric M8,
My oilpan bolts, valve cover bolts, and water pump bolts are metric, where as your first pargrah you claimed it's SAE.

Then again on your second pargraph you claimed it's metric.

I think we're getting out of the subject of what flare metric wrench size is needed for the hoses nut fitting coming from the oil pump fitting to the radiator?
Thanks

 

[charlief1]

Well at this point I'll walk away but will suggest that you that you do a little reading up on GNTtype.org which list the history of the engine as well as every single nut and bolt size for these cars and engines. Paul isn't a newby and knows what size they are so please remember that. He's been at it as long as I have or longer I believe. Hope you figure it out but I'm out.

 

[cetme1]

mine was a 28mm I believe.

 

[GNONYX]

Well at this point I'll walk away but will suggest that you that you do a little reading up on GNTtype.org which list the history of the engine as well as every single nut and bolt size for these cars and engines. Paul isn't a newby and knows what size they are so please remember that. He's been at it as long as I have or longer I believe. Hope you figure it out but I'm out.

Like I said before we're getting out of the subject or the threads of what I'm requesting information, and yes I have done and will continue to read all about our GN cars. In fact, as I have mention any times before, I really enjoy reading this site since there are many owners with many experiences with the GN's. One of the reason why I go to this site is to ask questions if anyone has some knowledge of what I'm going through right now replacing the nylon crankshaft sprocket.
I'm not a newby to these cars, nor I'm not an expert as some of the members on this board, but as I would said "Balls to the Walls" as I have already replaced and upgraded components from the engine bay to interior components.
Thanks for your input as well as Paul's input

 

[GNONYX]

mine was a 28mm I believe.

I know few members are claiming 1 1/8 is the size but I also want to know if there is a metric size or closer fitting; I will buy a 28mm socket.
Thanks You cetme1

 

[Nick Micale]

You claimed SAE is being used on oilpan, water pump, valve cover bolts and etcs. Majority all that you describe I have replaced during a spring maintenance, and all nuts and bolts were metrics..............

I am sorry, but you are not correct in that statement.

Paul is right on with his information. There are a few instances that metric and SAE hex heads are very close, and either type wrenches/sockets will work fine.

If you look at the bolts you describe, the designation on the heads will show SAE.

The water pump is all SAE except for the studded bolt at the top, and ALL the oil pan and valve covers are also SAE.

Check out the 1-1/8" hex balancer bolt with the Grade 8 SAE designation, and you will find that a 28 mm socket will fit it.

If you want help from the experienced people on this board, probably not smart to orally jump all over them.

 

[bison]

I know few members are claiming 1 1/8 is the size but I also want to know if there is a metric size or closer fitting; I will buy a 28mm socket.
Thanks You cetme1

It is 1 1/8. If you want to convert it to metric you multiply times 25.4 to get mm

 

[GNONYX]

I am sorry, but you are not correct in that statement.

Paul is right on with his information. There are a few instances that metric and SAE hex heads are very close, and either type wrenches/sockets will work fine.

If you look at the bolts you describe, the designation on the heads will show SAE.

The water pump is all SAE except for the studded bolt at the top, and ALL the oil pan and valve covers are also SAE.

Check out the 1-1/8" hex balancer bolt with the Grade 8 SAE designation, and you will find that a 28 mm socket will fit it.

If you want help from the experienced people on this board, probably not smart to orally jump all over them.

Hi Nick, Like I said before I'm not knocking on anyone comments, as I respect their opinions. All I'm saying is that on my engine the bolts are metric, and it maybe others has SAE. I didn't put the engine together, this is a stock engine straight from GM, who knows how they put thinks together.

As far as Paul statement; I'm just answering on his finding and knowledge to what I have found on my engine. I did not disrepect, or told him he is wrong on his findings.

Nick, you mention the designation on the heads will show SAE, what type of design or marking is on top of the bolts to indicate SAE and/or metric? Thanks

 

[GNONYX]

It is 1 1/8. If you want to convert it to metric you multiply times 25.4 to get mm

Mr. Bison, Thank you for the info, I didn't know the equation to convert into mm.