GTI 337/20th Anniversary :: Cam Belt Tensioner Failure - How To Check For Bent Valves
Sep 28, 2011
So my son's car started to sound like a diesel at idle - a good precursor to timing belt tensioner failure and belt slip, as that happened last night.
When we pulled the belt cover off and turned the dampener pulley by hand the belt was spinning on the bottom gear. When turning the engine over, there was no mechanical noises to indicate valves making contact. Did we get lucky or are the valves just bent out of the way?
How can you tell the valves are bent without taking the head off?
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I recently bought a 97 960. i have had a s90 before in totaled it i loved the car so much i found another. i was driving and broke the timing belt tensioner which in turn lead to the breaking of 5 exhaust valves that i know of. I've taken off the head and noticed that one of the bottom of the valves had melted onto the number 5 piston head.
I called around and search but every motor is at least 1000 and i have been told anywhere from 3500-4500 to rebuild. My question would b is there an easy way to fix or should i junk it. i bought it for a 1000 it has only 140000 on it an its in almost great condition. I attached some pictures of the head and piston so u can see the damage.
Attached File(s)
2012_04_07_19.02.39.jpg ( 1.45MB )
2012_04_10_16.45.26__1_.jpg ( 1.43MB )
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My tensioner pulley broke yesterday and I replaced it. But it had broken 3-4 months ago also.
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Totally stumped. Replaced the head gasket in Nissan 03 Sentra 3 months ago and car has been running great since with good power. Car suddenly completely dies after coming to a stop without any warning or any loud noises.
No compression in all cylinders. Seemed to be lots of oil in all four cylinders according to the bottom of the spark plugs. Pulled timing cover, timing marks still line up perfectly. Leak down test suggests valve problem.
Pulled the head and see all the exhaust valves are bent and the intakes are bent on pistons #1 and #3. (which is also odd as pistons #1 and #4 run in the same positioning) Question is how can all the exhaust valves suddenly get bent simultaneously with the timing chain still registering perfectly on the marks it's supposed to?
Things I've checked: I checked to see if the camshafts have sheared through the key, but they seem fine. No deep grooves found to indicate they slipped or anything.
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Looks like the 1-2 shift fork failed on my 337. This is the 2nd time this has happened to my car in under 100,000 miles of driving (I'm the original owner). The last time was about 3 years ago and the shop I was going to found a used transmission for me. Just curious, how common this happens to our 6-speeds.
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I am having this failure in my engine that is making me crazy while I am driving. Yesterday i took my car to a shop to see what was it. my MAF was gone ( I replaced it ) and the failure still going on. The mechanic connected his computer in my car and we went for a ride. HE told me cylinder 1 misfire.
This is what i did.
-change spark-plugs position (failure still)
-change coilpack (failure still)
What can i do ?
-clean injectors
-check for any carbon in valves
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I looked through the MKIV DIY stuff but didn't see one. My serp belt is in need of replacing soon. Seeing some cracking on it for sure. According to records from the PO it was bought as part of the timing belt kit at the end of '09 so I imagine it was changed then...just didn't think it would be so cracked so fast!
Anyway, looking to replace it in the coming weeks. If I could be pointed in the right direction that would be awesome. I do have a Bentley, but I find how-to's on here to often be better. But if I need to just follow the Bentley, I can do that too.
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is the timing belt the same for the 2004.5 and the 2005 gli?
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I'm new to the board always been into old school air cooled vws but just bought a 20th anniversary GLI Jetta and need to know how to deactivate the seat belt ding ding. The car did not come with an owners manual so can't look it up.
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2006 6.0l ... I've read all over for tips on routing this belt and everyone plays it off as being some simple '20-minute' task. I'm on my 4th hour on this now.
I can't figure out how to route the belt around the tensioner pulley, circled in the picture (from another thread). Everyone glosses over how to do this and I can't figure it out.
It seems like the only way to get it on is to bend the belt and slide it between the pulley and the block, but that I just can't reach the blasted thing.
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I have a mk4 gli and I'm having a problem with serpentine belt squealing when I'm at idle and when I turn the ac on. It's isn't all that loud at idle but when I turn on my ac it gets real loud. My ac stopped working a little but after this noise started to happen. Could it be possible that it's the bearing in the compressor that is making it squeal or could it be somthing else?
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I replace my timing belt and water pump and my engine is now over heating. I notice it's only over heats when the ac is running and the engine is idling. When I start to drive the engine temp goes down.
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My 2006 VW GLI keeps having an intermittent seat belt warning chime even though my seat belt is fastened (and there is no one on the passenger side). It's nearly impossible to reproduce this problem as it will do it at different times of the day and sometimes not for a week. It generally chimes anywhere from 5-10 min despite the seat belt being fastened. I've tried re-buckling and I've tried shaking the buckle and neither worked.
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Ok, so there's a whining sound that is going along with my RPMs, that is coming from the area of my belt, obviously i think its the belt. I am also leaking a little anti freeze. What this could be.
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Airbag light came on the other day while out on an errand. Take it to work and pull the codes. I got a low voltage code and a driver seat belt buckle code "00059" maybe I'm trying to recall but unsure. I have a pair of seat belt buckles out of a mk5 Jetta. Do these will plug into my mk4 by chance?
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Im the second owner of my 337 and i wonder if my car is already tuned. I talked to the first owner and he mentioned something about messing with boost and stuff. The car is completely stock except a BOV and a kn air filter.. Is there any way i can check to see if my car is tuned or not??
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I chipped my car with unitronics stage 2 3 weeks ago. 300 mile later the check engine came on. 42 DD down 3" to 2.5 cb no DV yet.
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So recently my check engine and abs light came on. I went to go get it checked out and it was the MAF censor. And here recently i noticed the airbag light came on. I replaced the MAF today, and the abs went away but check engine is still on due to the downpipe. And the airbag light is also on. Why it might have came on?
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So a week ago i needed to change my mass air sensor due to every time it was raining it would almost stale and my check engine light was on. Now this week both my traction and engine lights are on always. When i start my car u. The morning it turns over but almost dies due to The rpms so low basically it's almost stalling if i give it gas usually it kicks it over then stays on no problem. ALSO if i reev high i hear a little grind or moan noise as well.
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So I was on my way to work and i noticed my check engine came on. i get out of work and its still there. i go to the movies to watch friday the 13th (ok movie, worth watching in my opinion)...still on. i drive to my friends crib after to chill...still on.
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So I just recently bought a 20th anniversary GTI with 80k miles on it that I'm really happy with. However, the guy who sold it to me, neglected to put gas in the car. I know that the car is suggested to take Premium, however I put Plus gasoline in it. About 20 minutes of driving later, my Check Engine Light came on, and I'm a bit worried as to what the reason for this might be. What the issue might be. I checked the gas cap numerous times, as I know that many people neglect to screw it on correctly, so I doubt that would be the problem.
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