2000 Lanos 1.6 question about camshafts

saleen306 · Post by **saleen306** » Sat Aug 02, 2008 5:24 pm

A good friend of mine owns the Lanos 1.6 and while he was driving, the timing belt broke. He had it towed to pep boys, they told him the timing belt had broken and it needed to be replaced. They ended up keeping the car for 10 days, at the end of which they told him that he had 2 "dead pistons". At first they said the #1 and #2 piston were dead but I looked at the hand written compression test results and it said that #2 and #3 had 0 compression. They then said that he needed a new engine and it would cost about $2200. The whole thing sounded like bulls*it to me so I had him tow it to his house and I would work on it. I tore the engine down to the block to inspect the pistons and cylinder walls and they are all solid and in good shape. I cleaned the block, replaced the head gasket, COMPLETELY cleaned out the cylinder head, cleaned the intake and exhaust manifold, electrical connections etc I re-assembled the engine components and when I start it, it sounds like it's struggling and then it'll come on for a few seconds, idle too low and run rough. Any ideas? I might have accidentally switched the camshafts or tightened down the camshaft "hold-down" bolts too tight. Would this cause it to run this way? I have the cam with less "spokes" on the front of the engine and the one with more spokes on the back, is this correct? I aligned the cam shafts so that the lines point at each other horizontally, correct? Any feedback would be appreciated.

gse_turbo · Post by **gse_turbo** » Sat Aug 02, 2008 5:47 pm

sorry to hear about the timing belt going... the guy at pep boys wasn't correct but wasn't wrong either, just misunderstood or used the wrong terminology. he should have said "dead cylinder". the motors run to pretty tight tolerances and because of this they are "interference" motors. what happened is the valves on #2 ans #3 where bent. even though it might not have looked like when you pulled the head, a few of the valves were likely bent causing a small leak.

the easiest thing you can do at this point is tear down the head again and use a good condition salvaged head, or have this head rebuilt.

the cams are ok, they are identical. I'll take a look in the tech info section and post the link to the "replacing a timing belt on a 1.6" thread.

good luck,
Garrett

gse_turbo · Post by **gse_turbo** » Sat Aug 02, 2008 5:50 pm

here's everything you need to know about installing a new timing belt into a 1.6

How to: Timing belt replacment on a 1.6 16 valve DOHC

saleen306 · Post by **saleen306** » Sat Aug 02, 2008 8:53 pm

gse_turbo wrote:sorry to hear about the timing belt going... the guy at pep boys wasn't correct but wasn't wrong either, just misunderstood or used the wrong terminology. he should have said "dead cylinder". the motors run to pretty tight tolerances and because of this they are "interference" motors. what happened is the valves on #2 ans #3 where bent. even though it might not have looked like when you pulled the head, a few of the valves were likely bent causing a small leak.

the easiest thing you can do at this point is tear down the head again and use a good condition salvaged head, or have this head rebuilt.

the cams are ok, they are identical. I'll take a look in the tech info section and post the link to the "replacing a timing belt on a 1.6" thread.

good luck,
Garrett

Thanks a lot for the reply, it explains everything!!! I was over there today trying to get it started and it would start but I had to keep the throttle wide open and there was smoke coming out of the muffler which told me that oil was getting into the exhaust manifold. That would be cause by the bent valve(s) you told me about and that makes perfect sense because my friend poured 4 quarts of oil in through the valve cover when I told him to wait until the next day when I was going to start it. I took the exhaust manifold back off and it was ALL oily, great........ Any idea where I could find a replacement head for the Lanos? Also, what caused the valves to bend? Could it have been from Pep Boys not positioning the crank and cams correctly then starting it? I got the receipt from the timing belt install and called over there to talk to the tech that actually worked on it and I'll just say that the level of automotive expertise was way below the level I expected from them. I have already been through every salvage yard in San Diego looking for a few other Daewoo parts I needed and it was an ultra difficult task because I only found 3 Daewoo cars, none being a Lanos.

jidasas · Post by **jidasas** » Sat Aug 02, 2008 9:54 pm

More than likely if the timing belt broke it bent the valves then. Cause the valves stopped moving before the pistons and the pistons came up and tapped against the valves.

Jimmy

daewoomofo · Post by **daewoomofo** » Sat Aug 02, 2008 9:56 pm

the valves got bent when the belt snapped. what happened is the cams stopped mioving when the belt snapped, bu tthe crankshaft (along with the pistons) kept spinning causing the pistons to slam into the valves. try looking on ebay, or craigslist for daewoo parts

daewoomofo · Post by **daewoomofo** » Sat Aug 02, 2008 9:57 pm

damn you jimmy!

Isaac · Post by **Isaac** » Sun Aug 03, 2008 12:29 am

wow what a trip

jidasas · Post by **jidasas** » Sun Aug 03, 2008 1:29 am

Ha beat you by a few seconds...

MMamdouh · Post by **MMamdouh** » Sun Aug 03, 2008 7:53 am

easiest way to check for leaky valves with the head off the engine is to put it up side down (valves seats facing upwards) and then fill the head compartments with gas... leaky valves will make the gas drain.

MMamdouh