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Posted by: stephenaki Feb 6 2009, 07:09 AM

OK, I have a tendency to move faster than I think, amazing I got this far in life. I was reading the assembly procedures for the clutch and clutch pressure plate, as I read it talked about marking the position of the pressure plate in relation to the flywheel in order to maintain the balance. DAMNIT! Yup you guessed it I didn't do that. Primarily because I haven't had to do it with the standard block engines I have worked on before.

So, is there a way to remedy this mistake or am I just kinda hosed and, how much of a difference will it make since the rest of the motor was balanced?

Posted by: So.Cal.914 Feb 6 2009, 07:21 AM

I am not sure what engine this is but the PP should be close to balanced for rotation. Your FW is balanced, so unless there are guide pins and you missed them, it should be fine. Reason I say this is unless your FW is out of balance, and is placed back into balance with the install of the PP it should not matter. IMHO

Posted by: smdubovsky Feb 6 2009, 08:22 AM

I don't think it makes a difference. My crank, flywheel, & PP have always been balanced separately. Therefore you can replace one w/o having to use the others to rebalance. Imaging having to pull the motor apart just because you replaced the PP?

Posted by: stephenaki Feb 8 2009, 01:18 PM

Thanks all, I am assuming by the lack of additional posts that your observations are correct. I feel a bit better now.

Unfortunately, I didn't get to work on the motor this weekend as I am still waiting on my dial gauge and some other parts. I did clean up the distributor and the coil though so all was not totally lost. Also got my aquabox mounted on my motorcycle for my GPS along with the powerlett setup to power the GPS when I am on the road in May.

Hopefully I get the dial gauge in this week so I can continue my progress on the motor.

Posted by: Mark Henry Feb 9 2009, 07:00 AM

Most good balance jobs PP to flywheel orientation is very important and it is usually marked with a "0"

Posted by: stephenaki Feb 13 2009, 08:51 AM

No, "0" that I can find. Next question, non-balance question. Build sequence.

So, I had the guys at Boxter do the endplay. Long story short, they only put one shim in not three so I plan on re-checking when my dial gauge comes in.

Now, what can I do in the mean time? Can I assemble the pistons and cylinders and oil pump while I wait, more specifically, Haynes says pop in the cam followers before piston and cylinder assembly. Is it ok if I pop in the cam followers later?

Final question, how tight should the nut on the oil strainer assembly be? I can't find any torque settings and my books only say, "don't overtighten." Could use some help on this one. Reading my type IV book it says I can pretty much do everything prior to checking endplay and have the motor almost completely assembled.

Posted by: SLITS Feb 13 2009, 08:54 PM

The question of balancing the clutch assembly with the flywheel is a matter of vibration. For the street, I would imagine that a little out would a not be a great problem. Little vibration, maybe not as smooth idle.

If severe, it would put excessive wear on bearings, maybe more crank flex and possibly wear of the pilot bearing / transmission input bearing.

From observation, the Type four is internally balanced. The means you can have individual parts "zero balanced" and bolt them together and have a balanced engine.

On a high rpm engine, balance is critical for smooth running, ability to reach the rpm desired, minimize crankflex and make power.

That's my opinion and I'm sticking to it unless I get beat up by one of three individuals.

Also, I believe the factory put a slash mark in the outer diameter of the flywheel. This, when aligned the split in the case, is TDC. The factory would have balanced it and lined up the mark with the split. This should align the "O" or TDC marking on the belt pulley on the impeller.

Oil strainer, I want to say 15 in/lbs of torque. 1/4 drive socket ... about 1/4 turn after nut, washer, plate contact to case would be my guess,

Endplay can be set anytime you have access to the flywheel. Easier when you build it, but doable with the engine in the car.

Posted by: stephenaki Feb 14 2009, 10:29 AM

QUOTE(SLITS @ Feb 13 2009, 06:54 PM)

Posted by: hcdmueller Feb 14 2009, 10:45 AM

The oil strainer is listed at 9 ft/lbs in my bus book. My 914 book is out in the garage. I would think the torque is the same for the 914 block. I do know that if you overtighten it the block will crack in a very bad way. The three 914 flywheels I have all had a mark on the circumference that lined up with the split in the case for TDC on #1. I am surprised yours doesn't have one. At least you found the index pin and put it on the crank.

I hope the weather gets better here. If it doesn't I won't get a chance to drive mine before my deployment. Good luck with yours.

Posted by: Jake Raby Feb 14 2009, 11:34 AM

Yes, it makes a difference. Having balanced hundreds of assemblies I can say that the index of components as they are balanced is very important. This is the reason why we index EVERY pressure plate bolt per position. The pressure plate and flywheel are THE most important components to balance and index due to their diameter and mass.

Posted by: stephenaki Feb 14 2009, 12:01 PM

QUOTE(hcdmueller @ Feb 14 2009, 08:45 AM)