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#Porta tool vw line bore tool manuals
Yeppers, IMO the Mainliner is an underrated piece of equipment.Apparel American Hardware Pistons and Cylinders Flywheels and Clutches Gaskets and Bearings Cranks, Rods and Gland Nuts Oiling System Valve Train Pulleys Carburetion Programmable Fuel Injection Electrical Parts Cylinder Heads Traction Bars and Mounts Gear Sets, Tranny Parts, Suspension 5 Speed Kits Special Tools, Tech Manuals Exhaust Systems, Related Parts Shifters and Related Parts Wheelie Bars, Anti-shocker, Drag Fans Welded Balance Cooling Fans Type IV Tin Conversion Shop Supplies Cases and Related Parts With just those two tools I was able to recycle several mismatched case halves into functional engines.including one that set a track record at the local circle track - when it went through the mandatory tech inspection there were dropped jaws over it having 8mm head studs on one side and 10mm on the other True, it can only pick up the existing centers of the front & rear "seal" openings so there are cases (pun intended) where it's inadequate, but they're few in number.Īnother tool that was great to have around was the cutter which pilots in the #1 and #3 cam-bearing bores to whack #2 back out to standard on a slightly-warped case.can't remember who made that one, but it saved hours of handwork when you had to salvage a hammered case for a low-buck build. I guess we were lucky, ours never leaked fluid.but if it did I would've gladly paid whatever it cost to fix that. We always sharpened our cutters and sent the whole mess to a really good local machine shop for calibration every 100 uses or so (or at the first hint of there being an issue - a cutter that was starting to dull would leave a typical "interference pattern" on the machined surface). I agree with mji1198, in the hands of a reasonably competent individual equipped with an electric drill of sufficient capacity a Porta-Tool can do wonders. Old Fart, been there done that, in some cases may have been the first to do dat. I have certainly had blocks over the years that were not rebuildable because they were heat warped or severely pounded, but if everything else was o-k, the Mainliner did an excellent job of machining the main bearing seats. There are people in this world who shouldn't pick up a hammer, never mind a line-boring machine. When he machined a case, he only torqued down the six large case nuts and neglected to tighten the two 13 m/m nuts that straddle the small main bearing near the crankshaft pulley. I did know of one person with a mainliner that had problems with it, but the problem was self-inflicted. The only addition I added to the Mainliner was I made my own setting tool for the cutters so I didn't have to bother sending them out to be sharpened.
The only problem I had with this tool was after years of use I needed to put some oil in the hydraulic feed unit as some evidently had leaked out. I was always impressed with how accurate the bores were time after time, even when switching between cutters. I always gauged bored cases with a dial bore gage after I bored them.
As a machinist who has made precision bearings for virtually all aircraft engines that fly today as well as the bearings for the Space Shuttle I am well trained on making products with tolerances sometimes down to 30 millionths of an inch. I used this tool to line bore dozens of cases over the years and it has always done an excellent job for me. In 1980 I purchased a Mainliner, I READ THE INSTRUCTIONS. I started rebuilding VW motors while I was still in high school. I am 60 years old and have been a machinist/mechanic all my life. I was surprised to see negative postings about the Porta-Tool Mainliner.
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