Need Advice with decision

[MEz]

I'm going to buy a complete 6-bolt block that had a torn ripped timing belt of a 1990 gsx and has 90,000 miles on it. I actually bought the complete head from the guy a few days ago. After I took the valve cover off. I discovered that the head bolts were Hexes(Allen wrench style). Are the hexes OEM. I need help on how to determine if its a virgin block visually(Besides just looking at the head gasket).

 

[BLINKY619]

maybe arp?

 

[IntrusiveGSX]

Can you post some pictures of the head bolts??

 

[datbmac]

Oem head bolts are 10mm hex bolts. You can look at the pistons as well as they should look like this

 

[007jimmy]

OEM 6bolt studs are hex head style bolts (12mm shaft). OEM 7bolt are 12 point bolts (11mm shaft)

 

[MEz]

I want to learn how to tell visually if its been opened before, here are pics of the hex head bolt.

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[swiftdeathtsi1]

those are oem 6 bolt head bolts

 

[DDGDSM]

those are oem 6 bolt head bolts

Agreed. If they were arp's there would be an allen bolt with a 12point nut on it and you could read arp on the top of it.

 

[MEz]

So this engine has never been cracked, But is there any other test to determine if its been worked on before?

 

[bryanwheat]

Most likely is has been apart in some way. It is unusual to find one that hasn't.

 

[reyg]

I would say if you are that nervous by it then why not take it apart? You can learn a few things in that process as well.

 

[MEz]

True I mean it is only $50 for the complete block. Just wanted to learn a couple of detail in the process.

 

[pauleyman]

You'll never know if it's been torn apart. You can check the deck to see if it's been milled or not but it would require a machine shop. If you're rebuilding it anyway do you honestly need to know? Or just curious?

 

[MEz]

Yes I do plan to rebuild it. But I highly doubt it has been machined or worked on because, Like the guys said it still has OEM Head bolts, It only has 90k on it, was driven by a woman(I know a GSX), and I believe the timing belt was never changed.