Cams ok, vacuum help needed

[Chaingun]

Just finished stripping everything off the head to send it to the machine shop, i removed the cams per the specifications in the TSRM, but it appears to me that they are curved. :yikes: My questions is what did i screw up if anything. also will i be able to put them back in and have the cams go back to being straight. If not with a stock motor aside from the 6 thousandths coming off the head does anyone recommend a better set of cams or should i look for a set of stock ones?

 

[Poodles]

Are you sure they're bent? Only way to be sure is to check runout per the TSRM.

 

[Suprapowaz!(2)]

Pics? 7mgte, or ge?

 

[Chaingun]

7mgte, can't get pics tonight they're at the shop, i'm fairly sure they're bent bad, after loosening and removing the caps the front of the cams were still seated while the backs were almost a quater inch out of they're seats, and when i look down them while turning they look like a worn out pool cue.

 

[Poodles]

Did you remove the timing belt first? Did you loosen the caps in the order you're supposed to?

 

[Chaingun]

i removed the cams per the specifications in the TSRM

also the head was out of the car at the time of removal of the cams

 

[IBoughtASupra]

i removed the cams per the specifications in the TSRM, but it appears to me that they are curved.

Poodles^

Poodles is right, checking the runoff will let you know but I had 7M cams and they looked bent, check them and they were in spec. Pulled them off after the break in to replace with bigger cams and they were fine. Bores were good on the head as well, no scratches either.

Like Poodles said, check the run out and second, if you need a set, let me know.

 

[Chaingun]

will do, i'm dropping the head off tomorrow so i'll have my guys at the machine shop check, turns out one of them is an old school buddy

 

[hvyman]

Supposed to loosen a bunch of times going through the order then remove.

Sometimes they pop out like that. Its not a heavy crank. I wouldnt turn it like that either.

 

[Chaingun]

yeah i did it in 3 passes, hopefully when they're checked out they're ok, cause i honestly can't afford to replace them right now

 

[grimreaper]

Biggest concern with the loosening is to avoid breaking the cam itself. Old, worn valve springs have saved more then one cam over the years I'm sure.

If the cam looks warped there is no way I'd re use it unless the run out is measured. Even at the max run out, they look straight. I went through three sets to find an exhuast cam in good shape. Intakes never seem to be an issue.

 

[TomFraser]

One of my cars had a headgasket done before I had gotten it, instead of checking the head for warpage the machine shop had simply decked it so it had a flat surface but was warped, which warped the cams. I ended up replacing the entire head.

What do the cam journals look like? Are the cams eating them up? Just asking because mine were.

 

[89nasupra]

Wait, you loosened all the cam caps and when you got them all off the back of the cams were out the journal? I would think this would happen every time because some of the lobes would be trying to push down on the valves causing the cams to lift on one side. Are all the valves out of the head?

 

[Poodles]

Wait, you loosened all the cam caps and when you got them all off the back of the cams were out the journal? I would think this would happen every time because some of the lobes would be trying to push down on the valves causing the cams to lift on one side. Are all the valves out of the head?

Exactly, there is no way they could have been that bent and not done TERRIBLE damage to the head.

 

[Chaingun]

after going to the garage today i looked at the cams again much closer, being "bent" may have been more of an optical illusion to me than anything, i'm having them checked at the machine shop so i'll know on monday. The caps and cams don't look worn, nor does the head or caps, i hope to get good word from the machine shop. I think what threw me off is that this is a 24v engine, not used to that

 

[Chaingun]

turns out the cams are fine, got them and the head back today from the shop, finished cleaning the surfaces and not the head is on and torqued to 75ftlbs, gonna check it again tomorrow too. The exhaust is back on and ready to roll, and the intake is a step short of being reattatched as well. I had the lower intake on and was tightening it down when i somehow snapped a bolt off on the lower side, not sure how honestly as it was the 2nd pass on the bolts and it was being tightened to 13ftlbs as the manual specifies and the little sucker snapped off before the wrench clicked again, anyways, the lower intake is back off and i get to play with my easy out set tomorrow. Anyone know what grade of bolt i should look for in a replacement?

 

[Poodles]

You don't do 2 passes or 2 clicks. You do a steady even pull until it clicks and then stop.

 

[Chaingun]

This broke before it clicked once, i had tightened them with a wrench until they were finger tight then i was going back to torque them as specified fortunately it was the first bolt i was doing on the intake side so the gasket isn't ruined, in any case i should be able to remove it and replace it with one from the parts bin at the hardware store. just wish i know which size those are before i go up there so i dont' have to make 3 trips

 

[IBoughtASupra]

Pick up a 10x1.25. That should be the size. If you have a old one, take it with you and they will match it up.

 

[IJ.]

Pick up a 10x1.25. That should be the size. If you have a old one, take it with you and they will match it up.

If it's from the Intake side it's an 8x1.25.