Can I press it back in or is there another fix. Follow all procedures outlined in repair manual. e seat to fail and consequently, the valves; To help prevent this type of failure, there are a few things you can do. Menu. Prepare the cylinder head by removing the cams and lifters. The shop that did it said … First make sure it is definitely a blown head or gasket. Assuming this is an overhead valve engine, you will need to replace the head. Verify this by removing the handle and checking the ribbing on the stem and the handle. When the shower knob turns, but no water comes out, the handle or valve stem may be stripped. A cylinder leak-down test should expose bent valves without having to pull the head. Maintain a clean, efficient cooling system so the engine does not run too hot, use good quality fuels to help prevent carbon build up on the valve seats, and have your mechanic regularly check the valve clearances are within specifications. This is from oil that has seeped into the cylinder or cylinders overnight from the leaking valve guides. Bent Valves Bent Valves. That is what I would do unless it is determined you have a guide problem. Mech says that worst case looks like replacing all valves, machining head, replacing all regularly serviceable timing components. My cylinder with a leaky exhaust valve went from 70 to 79 by having the valve lapped. And if there really are bent valves, it would be caused by the valves hitting the pistons meaning also damaged pistons. I was fixing a blown head … Cylinder head repair cost can be difficult to estimate without removing the cylinder head from the engine and having it inspected by a professional engine builder or machinist. Bent valves... so I bent them back Not sure if anyone has ever run across this before, so I figured I'd start a post to bring it up. Bent valves... so I bent them back General Automotive www.tdiclub.com. The only problem is that it has a broken timing belt. I've done a bunch of these motors and there is no way I could set the timing without the tools. The valve head can be smoothed using very fine emery cloth. I wouldn't recommend any products that say they can repair a blown head gasket without physically removing … Just learned that my 2009 Passat 2.0T TSI skipped time due to a tensioner failure. Hey David, thanks for the A2A … The symptoms of worn valve guides would be a lot of smoke from the exhaust on first start of the day. how to remove bent valve W/O trashing guid VW MKIV-A4 TDIs (VE and PD) ... Irregular valve sealing with cylinder head valve seat. Reverse procedure to reassemble engine, use the magnet when installing keepers and after removing valve spring compressor tap the top of the valve lightly with a hammer to seat the keepers. A bent pushrod can not only affect your engine's performance, it can seriously damage other parts if the problem is not taken care of immediately. you can press the guide back in, but it will not stay in place, and will start migrating as soon as the engine reaches operating temp. Home. So far, scope shows all valves are bent. Check the valve seats in the head, looking for grooves, pitting and particularly for cracking. Economy - ... although I was careful to focus the bending forces in the softer metal portion between the valve head and the shaft. Slight pitting can usually be removed by grinding. Your efforts probably need to be focused on removing the deposits that have already formed. This is the engine with timing chain. I've done as much research as I could within the last hour I learned of the damage. The mechanic must have x-ray vision because that's the only way he could know there are bent valves without removing the head from the engine. The exhaust valve guide bushing has come loose. This weakens the part and makes it much more prone to breaking the head off down the road. Remove the old valve seal with pliers or screwdrivers and replace with a new seal. is it necessary to remove the valves and springs when servicing blown cylinder head gasket? If you have a stuck engine valve, your vehicle won’t run like it should. I just picked up a 90 AWD for $50!!! If there's coolant in the oil or oil in the coolant or coolant getting out without any external leaks, then the problem is probably around the head somewhere. i messed up one of my pushrods pretty good (only about 15 miles on my new motor ) i put a straight edge across the side of all the valves above the springs and they were all even, also measures distance between them and that was the same too... anything else i can do to check without actually removing the head? He understood the drawbacks to the fix. We need you to answer this question! He discovered that the Porsche valve was resilient enough to be bent back into shape and still have life in it. $3,700 on the high end. Although it sounds like a minor issue, this tiny valve can cause numerous problems — even engine failure. ... pits and for other signs of damage. Many of the factors that add up to a high cylinder head repair cost are things that can’t be seen with the naked eye and even with the right tools can’t be checked with the head still installed on the engine. Carbon residues generated by irregular combustion will jeopardize the sealing between the valve and its seat. the belt was still on but the idler pulley bearings came off of it. The downside is that the valve is not supposed to be bent back into shape once it's bent. But it also obviously might have bent valvesl, how can I tell w/o removing the head (due to laziness and poorness) if there are any bent valves?