| VWHelp.com
Common Mistakes
|
|
| Go
Back
Price of Installing a New or Rebuilt Motor Q&A This
Page |
availability. Sorry the shopping cart is not activated at present. -------------------------------------------------------------------------------------------------- # 1 - Using Silicon Seal in Excess (We Strongly suggest any type sealer but Silicon Seal) We personally like Gasgacinch Sealer # 2 - Failure to clean all Oil Passages in the case and oil passages in Crank (new or used), also not flushing the old Oil Cooler. # 3 - Removing Flywheel with Pry Bars is wrong. Always use Flywheel Puller and replace the Gland nut with a new one and torque to proper specifications (217 ft Lbs) ** Make a tap to clean gland nut threads ** # 4 - Checking 10mm Head Studs when motor is being disassembled. and torque head studs properly. # 5 - Heat both the Steel and brass gears before installing on crank. # 6 - Main Bearings not properly installed on bearing dowels. Mark bearings in case before installing bearing on crank. # 7 - Clean all gasket sealer from case studs before rebuilding. Run die over threads to insure proper torque. Note: the threading die should be set loose enough to clean the threads not cut or remove any metal. # 8 - Checking case for warped before assembling motor. (Center main bearing saddles) # 9 - Check Cam Tunnel every time case is align bored. # 10 - Checking Lifter Bores at time of teardown and Lifter clearance on rebuild with aftermarket cams .040" min cam to lifter .Low oil Pressure # 11 - Check Piston to Head Deck height. (Minimum is .040") (.060" minimum when using 92's are 94's) # 12 - Set Distributor Drive End Play before bolting case together "Never turn crank until distributor is installed. # 13 - Setting Flywheel end-play properly with 3-shims, new "O" ring and metal gasket with main bearing next to flywheel tight on case flange. # 14 - Timing must be set to proper specification. "Depending on Distributor" Can not be set by ear. # 15 - Never forget to install deflector tin under the cylinders. If you don't run the thermostat, Weld flaps in open position. # 16 - Always keep it clean (very clean) Clean # 17 - New Cams must have proper break-in (see cam card for instructions) Cam Break- In # 18 - Correct Rocker Arm Geometry after installing High Lift Cam, Fly-cutting Heads or resurfacing cylinder seating surfaces. Check Valve Springs for coil binding. (minimum of .100" clearance) check if "0" rings are used under rocker arm stands (some do some don't) # 19 - Caution when replacing Oil Cooler Seals. Be sure the correct seals are used and spacer washer if needed. Diameter must be correct for case & cooler and correct thickness. # 20 - Change Oil after cam break-in & reset valves. # 21 - Checking out new cases. Quality on some new cases is poor, some manufactures make corrections quickly and some don't seem to care. We recommend checking every new case just like you would check an old case before a rebuild. Oil relief Plunger Seating. #22 - Trying to Remove Broken Exhaust Studs with Easy-Outs or Stud Extractors How to remove Broken Ex. Studs--> *info Larger then Stock Motors add the following. # 1 - Not resetting compression ratio (Compression Raito goes up as cylinder size is increased) Note: minimum Deck height with 92's and larger cylinders is .060" # 2 - Always check for air leaks after any rebuild # 3 - Case savers must be below cylinder seating surface. Cylinders must not be setting on case savers. # 4 - Re-torque Head Studs after 1500 to 3000 miles. Re-torque all, this means removing tin. # 5 - Re-jetting Carb or Carbs after any Changes. Just because Fast Freddy has the same size motor you can't use the same jetting. every motor needs to be jetted. You can not copy jetting from another motor just like yours. # 6 - Opening up Valve Pockets after installing larger cylinders (Most Important with Big Valve Heads) # 7 - Use H.D. Gland Nut and torque to proper specifications. "Remember the Gland nut might be good for 350 plus lbs but how about the crank threads. # 8 - Crank Grinding. Remember VW Cranks are ground with larger radiuses the most cars so the local crank grinder might cause the cranks to break. # 9- Over Doing the three "C" First time motor builders quite often have to learn the hard way (some never learn) Don't get carried away with over Cam-ing, Over-Compression, and Over-Carburetion #10-Never use the stock oil strainer in any of my high performance motor that has an external flow oil filters. The small amount of restriction on the intake side is not wanted. We are a strong believer of placing a large magnet in the oil pan and in the bottom of the Transmission. It will pick up any loose metal so it don't cause any father damage. Harbor Freight has the Rattle Snake Magnets Note: Some of the New VW cases have the oil pump inlet and outlet passages in new locations. Make sure the passages in the case align up to the ones in the oil pump. Also check for aluminum flashing in all the cast passages I am
sure I have we have missed some very common made mistakes and
would appreciate help in making sure this list is more complete.
Send suggesting to Vic. at -> Mistakes
Made Help
on picking the correct cam for your motor -->
*info All Questions should be E-Mailed to Vic's Contact Webmaster |