[RESOLVED] Can't manualy turn engine past certain point

[man_of_saturn]

Need some help...don't want to have to take my car to a shop and pay a large bill.

Just installed a newer head, cams and cam gears. Tried to turn the engine over manual at the crank and the engine only turns to a certain point and stops.

Note-Caps are original and in correct position, engine worked fine prior to head and cam swap.

Any ideas or thought on how to fix this would be great.

 

[forcefed4]

Sounds like you need to check your timing.

 

[BrokenTsi]

Ya. The timing is probably way off. Valves could be hitting the pistons, and if you're not careful, you could bend them by hand. Are the dowel pins UP when you set the timing belt?

 

[man_of_saturn]

Yeah, the pins or up on both cams, and the pistons are at TDC. What else is there to do?
Thanks!

 

[BrokenTsi]

Whats the history on this new head you swapped in? And when you say the engine stops, does it come to an abrupt stop, or are you too afraid to go further because there is resistance? The reason why I ask, is because compression makes it a little difficult at a certain point when you crank the engine.

 

[forcefed4]

^^ what he said. Is it just resistance stopping you or does it feel like it's hitting. Are your plugs in?

 

[man_of_saturn]

Head has been ported and polish, and I put in new springs and retainers. Head visual looks good and I'm using a Cometic gasket with ARP studs.

Crank just comes to a solid stop like it's hitting something.

I removed the caps to take the pressure off and torqued them back down to 15lbs and still get the same thing.

At the same time I'm rebuilding a 1G GSX and running into the same issue, I must be doing something wrong.

Ideas?

Thanks!

 

[KYNgsx]

Is the timing belt on yet?

 

[man_of_saturn]

Yep, TB is on.

When I try to turn the crank I have only the driver side wheel off the ground, will that make it stop turning? (car is out of gear)

 

[turboglenn]

Did you bleed the lifters down before installing them? When out of the engine they extend to full length and even if the motor is timed correctly they can still cause a valve to hit a piston and stop you from turning the motor. Take the plugs out to make sure you're not just feeling the compression.

Go to the VFAQ site and there's a page in the engine section that explains how to bleed them down.

 

[man_of_saturn]

No, I didn't. I'll check that out, hope I don't have to remove the head.

Thanks!

Update...I bleed the lifters and still nothing. Now with the TB off and caps torque down engine turns but cams won't. If I didn't mention before Cam Caps are the one that came with the head and are in the correct order.

Any other ideas?

Thanks!

 

[BrokenTsi]

Take off the valve cover and have a buddy move the crank for you. Make sure nothing is stuck in your valve springs. Its a long shot, but I would do it anyways to make sure.

 

[elementalwindx]

I'd swear that your supposed to torque the caps to 5 not 15. Take the spark plugs out, valve cover off, set time and make sure its 100% Make sure the lifters are set and not extended all the way out, try to spin it while in neutral.

If the cams wont turn, that tells me that the caps are too tight. I hope you lubed the journals of the cams too before you put the caps on.

 

[steve]

I'd swear that your supposed to torque the caps to 5 not 15.

It's simple to look it up and know that the correct answer is 14-15 ft lbs Minimal swearing required.

 

[elementalwindx]

It's simple to look it up and know that the correct answer is 14-15 ft lbs Minimal swearing required.

My dsm manual cd no longer works or I would have. Sorry for the misinformation. There couldn't be that much to this issue though. Take the cams out and see if the crank will spin 100% that way you know your hitting a valve.

*edit* thats right, I remember 5 for the reason that one of the heads I've put cams in snapped 3 bolts at 5 one time . Damn I hated that head. Its been so long since I've put in a set of cams.

 

[man_of_saturn]

Took the valve cover off- springs are clean and free from any foreign objects.

I had the caps lubed and torqued to 15lbs.

With the caps torqued down and TB off the crank turns now with no issue, it just won’t turn with the belt on. (cams won’t move)

 

[LunarEclips]

Check Cams for scorns or damage and check caps for any aftermath damages from the cams? If you bought the head from someone else assembled, they may have been a reason they sold it to you...(possible metal shards or foreign metal pieces slipped between the cams?)

Could a cam be bent?? I've heard of a situation on a hardcore race setup that a cam could bend by fractions of a mm siezing a motor simply by lots of boost and the car jumps timing.

Did the cams turn freely with the head off the block??

 

[Defiant]

Show us photos of your timing marks.

 

[man_of_saturn]

Check Cams for scorns or damage and check caps for any aftermath damages from the cams? If you bought the head from someone else assembled, they may have been a reason they sold it to you...(possible metal shards or foreign metal pieces slipped between the cams?)

Could a cam be bent?? I've heard of a situation on a hardcore race setup that a cam could bend by fractions of a mm siezing a motor simply by lots of boost and the car jumps timing.

Did the cams turn freely with the head off the block??

Check: No scorns or damage cap, person I bought it from says there the original caps, no metal pieces between the cams, valve spring or cam gears.

Cam are brand new so they shouldn't be bent at all.

When I first installed the cams on the head+block they turned fine; I forgot to put on the cam sensor ring and took them back off and when I put then back on I get the issue I currently have.

 

[matt98eclipse]

To me it looks like you have way to much slack in that belt.

 

[kmoore]

To me it looks like you have way to much slack in that belt.

I don't know if that will solve your issue but I totally agree. Looks way loose.

 

[jongreene]

Do you have spark plugs in the engine?

 

[matt98eclipse]

Somethings not right your belt should not be that loose. I would try and redo the timing and make sure the belts tight.

 

[man_of_saturn]

Somethings not right your belt should not be that loose. I would try and redo the timing and make sure the belts tight.

Tried that and still nothing...afraid I'm going to have to pull the head off to confirm that I didn't bend any valves. But then again my other motor(6bolt) is doing to the same thing.

 

[Jeff99GS]

take your spark plugs out and then try to turn the engine