timing gears

[turboCR]

Need a little help. Was on the Freeway going 70 and lost power. To make a long story short, no compression in a couple of cylinders, so I pulled off the front cover and discovered a bad cam sprocket. Not Broken, but the teeth were history. I puled both gears and the chain.

The cam still turns easily. I have ordered double roller gears, but I was a knothead [tired after 3 hours] and after I removed the cam sprocket, I noticed that it can go on 180 degrees with the two bolts that are supplied. There appear to be no distinguishing marks to tell which is right.

Since the Crank is keyed- no sweat. How do I tell which is the right configuration? I did notice that the flage on the cam is flat on one side.

One more thing, did I Mess up the valve train when the chain went for sure? I so far into it, that pulling the heads is only a little more work

ANy advice appreciated.

Thanks!!!

 

[FJM568]

Actually, the bolts for the cam gear only line up one way...One of the holes is offset, so there shouldn't be any way to install the cam gear to the cam any other way...

Just make sure that #1 cyl is at TDC(I think the keyway on the crank is at like about the 1 o'clock position) and that the marks on the timing chain gear and crank gear line up(6 o'clock on timing chain gear to 12 o'clock on crank gear)...And then follow the directions on www.gnttype.org for setting the cam sensor after everything else is installed...Make sure that you prime the oil pump BEFORE you set the cam sensor and starting the motor...

edit BTW, if you were doing 70 on the freeway when your timing chain bit the big one, then you also probable bent some(or all of the) valves...Do the timing chain and check the compression again, but I think you will need a valve job...These motors are interference motors, meaning that the valves will hit the pistons if the valve timing goes way off...The stock pistons should still be okay to use, just smooth out the nicks so there are no sharp edges on the tops where the valves hit...The stock pistons are very tough to break...

 

[turboCR]

Thanks,

You were right they are slighly offset. I forgot, this is a COMLICATED machine. I got it all apart, everything labeled-8 hours to dissasemble.

The valves look ok, but I'm glad I pulled the heads. A couple of pistons have marks where they hit valves.

I assume I can prime the pump with a homemade jig and a drill, right?

ALso, for this of you who change your oil every 3k, even with Mobil 1, KEEP DOING IT! I do: and the Camshast and internals after 200+K on my motor are still mint!

COuld not find the Cam setting procedure though, where should I look on the website?

Thanks

Craig

 

[BLACK Ttype]

If your talking about setting the cam sensor go here:
http://www.gnttype.org/techarea/ecmsensors/camsensor2.html

this should work.

 

[turboCR]

Thanks,

I'll let you know!

Craig