Engine installation question
Thanks,
Mike
Mike, to your issues, seems like you have several different problems.
Sometimes when you install a windage tray on the main bolts, if the tray isn't properly positioned, the crank can hit and bind against it. Then the engine can't be turned over.
But before assuming that's the problem loosen all the rocker nuts, then try turning the engine. It could be a valve hitting against a piston.
If the engine will manually turn with all the rocker nuts loosened, then that's the cause of the engine being locked. If it still won't turn, you'll need to drop the oil pan. It's easiest to turn the engine will all the spark plugs removed.
Next, the engine probably wouldn't fire because either you have the distributor installed incorrectly or the lifter preload not properly set. If it's the distributor you must remember that the engine needs some amount of ignition advance to start and run.
Anything between, say 4 and 10 degrees of advance BTDC will get it started. After it's running, you set the final timing using your timing light. If you don't have the timing set in thar range, the engine will always ALMOST start, but won't. If you have the advance set too high, the engine will crank really slowly, laboring to do so.
Now you need to find #1 TDC ON THE COMPRESSIONS STROKE.
Once you solve the locked-up problem, remove the distributor and the #1 spark plug. Either stick your finger in the #1 spark plug hole or twist a piece of paper towel and stick it in the hole. Bump the engine. With your finger feel for pressure; that's tell you the #1 is on the compression stroke. Using the paper, bump the engine until the paper pops out; that's tell you the #1 is on the compression stroke.
Now look down at the TDC mark on the damper; is should be aligned between 4/10 degrees BTDC - NOT AT TDC or ATDC; remember you need some amount of advance.
You do know how to distinguish between BTDC and ATDC on the timing tab, right?
Now drop the distributor back in and align the rotor tip with the #1 spark plug terminal inside the distributor cap. Replace the #1 spark plug.
If the lifter preload is set correctly and all else is plugged in/connected properly, the engine will fire.
As I've written more times than I can remember, the lifter HAS TO BE ON THE BASE CIRCLE of the camshaft lobe when setting the lifter preload. It can't be on the lobe's ramp or nose - base circle only!
Next, you've fallen into the trap that so many other have; following the directions shown in so many manuals. Those directions will have you moving from one side of the engine to the other, setting this one and that one. The procedure is so error prone that most guys fail to set their preload correctly by following it. Do yourself a BIG favor and use the IC/EO (Intake Closing/ Exhaust Opening) method.
I have a long file on how to adjust lifter preload; if you need it let me know.
Hope this helps and keep us posted.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!
Mike
I'd say the break-away torque should be less than 25 ft/lbs.
Did you check to be sure you didn't install one of the main caps backwards? Most caps have an arrow cast into them which should face forward. Check that the rear main isn't installed backwards, too.
There are also several different things I'd try:
Remove the serpentine belt so that no accessory can turn.
Try turning the engine manually in the opposite direction
Loosen the three center main caps, leaving only the #1 and #5 torqued - see if the engine will manually turn.
Check that the main caps are installed on the correct main journal; they should be numbered.
Check that no cap is installed in a cocked position. Run your fingers at the parting line between the main cap and the block's main web to feel that the caps are aligned with the block.
While under the car, shine a light up onto the cylinder walls and look for any verticle scratches in the bore. This could indicate a ring isn't recessed in the piston.
Remove the distributor and stick a long screwdriver down the intake manifold opening. Try turning the oil pump to se if it's locked.
Any chance the flexplate or one of its bolts is binding against something?
How about the harmonic damper; any chance it's hitting the frame or steering rack?
The spark plugs being out eliminates hydraulic lock-up so what's left is mechanical interference. I can't think of anything else right now. I'll let you know if I come up with anything else.
There's GOT to be a reason; problem is finding it.
I hope this helps.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!
Thanks for taking the time to help. It is definitely mechanical interference. Yesterday was the first time i removed the main caps, i did them one at a time, and put them back exactly the way they were. When i changed the bolts { to replace with studs to hold oil baffle } I did not remove caps, i didn't even loosen the two outside bolts { four bolt main } I need to get to the bottom of this today, if i don't get back to work i'm gonna starve. I'll keep you guys posted.
Thanks,
Mike
I've had that happen to me on a few engines and had to lower the tray for the needed clearance. My instances occurred when the engine was being built on the engine stand though.
I used double, Lock-Tited nuts/lock washers to lock the tray in the correct position. One pair of lock washers and nuts on either side of the tray.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!! Graduation Day Parade 20 May 2010!!!
Last edited by JAKE; Nov 3, 2009 at 05:39 PM.
For many years I built engines for several teams and was able to maintain their trust by paying attention to detail. That included having the right tool for the job and properly using it. I never settled for the "as good as" way of thinking. Just do it RIGHT and be done with it.
When I bring a freshly machined engine home for assembly, I first wash it with hot soap and water at least five times, forced air dry it then oil ALL those surfaces prone to surface rust. So, thorough cleaning is fundamental. You can do the same with your heads, etc.
The cleaning doesn't have to be done by a machine shop (in fact I clean behind them too, not trusting cleaning to someone else who may be having a bad day).
The fewer deviations you make from generally accepted assembly procedures, the fewer variables you introduce into the engine build. The fewer the variables, the less likely the engine will suffer premature excessive wear or failure. The closer you pay attention to detail and the closer you hold your tolerances, the better your engine will run and the longer it will last.
If your head bolts call for a specific lubricant/thread sealant, use ONLY that. Don't fall into the "as good as" trap. Don't say: I don't have ARP's bolt lubricate so I'll use 30W oil because it's "as good as" . . . .
If your gaskets specify "Install Dry", do it. Don't apply silicone sealant here and there or spray something on the gasket surface.
Same with installing your balancer/ hub; don't hammer it on. Use an installer tool. A friend of mine use to install his harmonic balancer with a long handled sledge hammer. Ever watch a lumber-jack chopping down a tree? Made my hair stand on end.
Follow all the recommended torque specs; don't get sloppy or creative. Go over and double-check all the critical torque settings.
Check all your clearances as you go along. If something seems to not fit quite right, STOP - find out why. I could go on and on.
Learn to identify and ignore bad information of which there never seems to be a shortage.
Of course if you choose to take the "as good as" approach and/or cut corners, well it's your call since it's your engine.
Hope this helps.
Jake
West Point ROCKS! Nation's TOP COLLEGE per Forbes Magazine!
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Thanks,
Mike
You can change a main cap.
However, the engine will need to come completely apart, and be properly allign honed to be sure the top cap is concentric with the bottom half of the main saddle.
Sorry man. Bad news for sure, but a good life lesson. Happened to me too many years ago. I am now a firm believer in dealing with local machine shop talent only.
You can change a main cap.
However, the engine will need to come completely apart, and be properly allign honed to be sure the top cap is concentric with the bottom half of the main saddle.
Sorry man. Bad news for sure, but a good life lesson. Happened to me too many years ago. I am now a firm believer in dealing with local machine shop talent only.
There's a TON of bad information being spread around as if it's gospel. This business of not being able to change main caps is yet another example. Biggest problem is recognizing it when you hear/rear it.
But yes, you need to have the block line honed for the new cap(s).
Jake
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