MoparFins

Techical Discussions => Tech- - Engine => Topic started by: James Brown Jr, on September 23, 2013, 07:35:32 AM

Title: neon problems??
Post by: James Brown Jr, on September 23, 2013, 07:35:32 AM
anybody have any experience with neons?? specifically timing and head problems??
Title: neon problems??
Post by: dana44 on September 23, 2013, 09:12:17 AM
What's going on?
Title: neon problems??
Post by: dana44 on September 23, 2013, 09:13:35 AM
SOHC or DOHC? Interference engine, break the belt and valves bend.

Title: neon problems??
Post by: James Brown Jr, on September 23, 2013, 09:58:21 AM
Well the timing belt broke while I was going 10mph. Replaced the belt and won't start.  Occasionally backfires out of the intake. SOHC interference
Title: neon problems??
Post by: dana44 on September 23, 2013, 10:02:40 AM
Yep, guaranteed you have at least 2 bent valves. They are repairable, the valve guides can be replaced, but the head needs to come off to replace them and the two (minimum) bent valves.
Title: neon problems??
Post by: James Brown Jr, on September 23, 2013, 10:17:25 AM
Wouldn't it be easier to replace the head? ?
Title: neon problems??
Post by: dana44 on September 23, 2013, 01:28:01 PM
Might be, depending on the level of damage done. Sometimes it is cheaper to replace a couple valves and guides if it is only 2, unless you can find a head for about $100.
Title: neon problems??
Post by: James Brown Jr, on September 23, 2013, 02:00:11 PM
I can get a head for a little under 200 relatively local. The condition of my current head is unknown at this point.
Title: neon problems??
Post by: dana44 on September 23, 2013, 03:39:16 PM
Time to yank it off and see what the damage is. Like I said, determine which is cheaper way to go. That's the one bad thing with the interference engines. Wish they would have originally spent the extra $15 in parts cost to make it a chain drive instead of a belt drive.
Title: neon problems??
Post by: dana44 on September 24, 2013, 08:31:57 AM
Also, remember to replace the head bolts, they are torque to yield bolts.
Title: neon problems??
Post by: James Brown Jr, on September 24, 2013, 10:03:56 AM
Well gonna remove the head tomorrow.  Will be sure to get pictures
Title: neon problems??
Post by: dana44 on September 24, 2013, 10:34:20 AM
OK, I'll quit bugging you!
Title: neon problems??
Post by: Snotty on September 24, 2013, 05:29:29 PM
Here's hoping the pistons are OK.
Title: neon problems??
Post by: James Brown Jr, on September 24, 2013, 05:39:00 PM
Don't say that. I'm hoping the damage is minimal due to the slow speed I was going
Title: neon problems??
Post by: dana44 on September 24, 2013, 05:51:02 PM
Naah, if she turns over, a couple dents in the piston top but rarely any damage other than that. All will be fine after the head is changed.
Title: neon problems??
Post by: James Brown Jr, on September 24, 2013, 06:20:10 PM
I am probably gonna get a junkyard head simply because it would be quicker than getting the head rebuilt.  I need this car back on the road like last week.  Lol
Title: neon problems??
Post by: dana44 on September 24, 2013, 07:01:50 PM
Find a head that doesn't have a broken or brand new belt, haha.
Title: neon problems??
Post by: James Brown Jr, on September 25, 2013, 08:19:04 AM
What brand of gasket is best? ? And head bolts??
Title: neon problems??
Post by: dana44 on September 25, 2013, 08:59:17 AM
OEM is the easiest if there is a Dodge dealership nearby. People using head bolts off egay have been saying the bolts are wrong several times, along with a bolt or two which have broken. Head gasket will be the MLS, which is good, head bolts and upper gasket set is right around $200.
Title: neon problems??
Post by: James Brown Jr, on September 26, 2013, 07:18:45 PM
Got parts ordered,  went to rock auto for them,  felpro gaskets and bolts.  Got the intake off and exhaust unbolted. Pulling the head tomorrow. And tracking down a head that isn't outrageously expensive or broken.
Title: neon problems??
Post by: dana44 on September 27, 2013, 05:26:48 AM
Sounds good!
Title: neon problems??
Post by: James Brown Jr, on September 30, 2013, 03:46:03 PM
So a little concerned.  I removed my old head in anticipation of the new head arriving tomorrow,  and it looks fine. Normal carbon buildup but the valves look ok to me. Will get some pictures up later tonight.
Title: neon problems??
Post by: Steve on October 01, 2013, 08:58:34 AM
You can't always see a bent valve
Title: neon problems??
Post by: dana44 on October 01, 2013, 09:06:39 AM
Agree. Turn the sprocket and watch what is going on. Another thing you can try is removing the cam so all the valves are closed and pour a little bit of something like laquer thinner down behind each valve and see if it then bleeds through to the combustion chamber. If the valves are closed, you might be able to see a tiny ring of the fluid that bleeds through, but a larger amount will make its way through easier. Valves have to be closed to make this check. Laquer thinner is good because it will evaporate and not rust anything.
Title: neon problems??
Post by: Steve on October 01, 2013, 09:42:20 AM
If things are that bad with it, I have another solution to use.  By that time it doesn't matter
Title: neon problems??
Post by: James Brown Jr, on October 03, 2013, 08:10:09 AM
What's that Steve? ? So replaced the head,  set the timing,  and got it all together.  Now it runs. Bad rough idle and when I start the car rpms rush up and down.  Loud too. Well louder than usual.
Title: neon problems??
Post by: Steve on October 03, 2013, 10:40:11 AM
Louder?  Do you have an exhaust leak?  Or is it a mechanical noise?  
Make sure the oil is getting to the head
Title: neon problems??
Post by: dana44 on October 03, 2013, 10:46:29 AM
How did you set the timing? It's all sensor controlled. Yeah, check for exhaust leaks and the revving/high rpm can be a vacuum leak.
Title: neon problems??
Post by: James Brown Jr, on October 03, 2013, 01:06:49 PM
Manifold leak is what I'm guessing. I have brakes like a rock lol.
Title: neon problems??
Post by: James Brown Jr, on October 17, 2013, 04:04:33 AM
Well pictures aside,  the car is back together and running.  Had to take it all apart again due a bad cam seal, but overall not bad. Running good. Smokes quite a bit until warmed up. But I can handle that.  Gonna replace the car next spring.  Too rusty and beat up lol
Title: neon problems??
Post by: dana44 on October 17, 2013, 05:49:34 AM
So, was it an intake or vacuum leak, or what?
Title: neon problems??
Post by: James Brown Jr, on October 25, 2013, 07:01:41 PM

ok so it was a vacume leak of sorts. the sensor at the throttle body ( with a vacume line) was full of gunk. a miracle it didn't bother me before. got it cleaned up and it runs fine. then the cam seal blew. well tore it all apart and fixed that  and now about 2K miles later still going like a champ. now for the brakes lol.
Title: neon problems??
Post by: dana44 on October 26, 2013, 06:44:20 AM
Good deal!