broken timing belt

[danny7481]

my brother in law has a 95 eclipse with the 2.0 non turbo. his timing belt broke and needs me to fix it. do you think he could have bent a valve? he said he was only doing about 5mph and had the clutch in when it happend. also ive done the timing belt on my 94 eclipse 1.8, could it be as straight forward on his as it was on mine. thanks for the help.

 

[beating4g63s]

I'm pretty sure he has some bent valves if the timing belt slipped it might not be as bad as when mines slipped and the motor went to hell, it is pretty much a straight forward job, just read chiltons or haynes and it'll show you all of what you need to do.

 

[danny7481]

so the valves may need to be replaced?
the belt broke on my 1.8 and luckily i didnt bend a valve.

 

[251Eclipse]

i bought my car with a broken timing belt and the best thing i did was take the head off and have the valves checked. because you start putting that belt on and find out you have bent valves that will ruin a week right there. because more than likely your valves are bent.

 

[rcjr9186]

it's hard to tell w/o taking off the head to check... or without putting a new timing belt on there and cranking it up... some ppl get lucky and some ppl get royally screwed... best case scenario, you get lucky and only need to replace timing belt (while doing this i suggest water pump, idler bearing, tensioner bearing). worst case scenario... bent valve(s), cracked piston(s) - need rebuild. IMO while you have the timing belt off... change the head gasket, if it hasn't gone yet... most likly, it's coming.

 

[danny7481]

it's hard to tell w/o taking off the head to check... or without putting a new timing belt on there and cranking it up... some ppl get lucky and some ppl get royally screwed... best case scenario, you get lucky and only need to replace timing belt (while doing this i suggest water pump, idler bearing, tensioner bearing). worst case scenario... bent valve(s), cracked piston(s) - need rebuild. IMO while you have the timing belt off... change the head gasket, if it hasn't gone yet... most likly, it's coming.

hmm, how difficult is it on this engine? ive done a head gasket on my 1.8 and it wasnt nothing to it. can you pretty much visually tell if it has a bent valve/cracked piston? my bro-in-law said he heard a loud pop when the belt broke. may have been a valve bending.

 

[Locke]

You ought to take the head off. You could have lucked out and not bent a valve. But chances are there is damage, and should disassemble the head to check. Fortunately, removing the head is not very difficult.

Roll the valve stems on something flat to check for straightness. May want to get new guides squeezed in if the valves are bent.

 

[danny7481]

is it hard to change a valve? ive never changed one before. thanks for the help so far guys.

 

[DSMLaser90]

when my timing went i was with some buddies and my car started making loud noises, i drove home took the timing cover off, i lost some teeth on the belt and jumped timing, removed the head to check the valves, they were fine. make sure you have the chiltons book for the car and or research the timing specs..

 

[Locke]

To pull a valve, first remove the head. Remove the cam shafts, and set the rockers and adjusters aside. Keep the rockers and adjusters paired together, you want to install them in the same location they were removed from.

Put a valve spring compressor on whichever spring, and compress it. Use a pair of needle nose, or a magnet, or a stick with a dab of grease on it, to remove the keepers. Dont lose them.

Take off the spring compressor, remove the spring, and its retainer. If the valve hasn't already fallen out by this point, it may be bend. Push/pull it out. Too easy.

Unless you are getting a valve job done, or new seats, when you put new ones in, or even the old one, put some compound on the face and spin it a bit against its seat with a drill. Gently. Clean the valve compound off, and reassemble.

A dab of assembly lube on the keepers will hold them on the valve when reassembling the head.

With the head off, clean all the carbon out of the bowls and off the valve bottoms. Get as much off the top of the pistons as you can.

Have fun.

 

[rcjr9186]

if ## taking the head off for a new TB... drop the whole motor, i just got done doing one in my 99 gs and it was a pain, but only b/c it was so tight!! if i had to do it again... i'd drop the whole motor, it would be so much easier! btw, if you do take off the head i'd suggest changing the Head Gasket along w/ the timing belt, waterpump and pulleys.

 

[JWoodley]

In all likelihood you probably bent several valves being as the pistons and the valves share the same space in the combustion chamber. When mine broke I went 16/16 on bent valves and #2 and #3 had some nice valve reliefs in the tops of the pistons. I got a head from a junkyard and had it reworked (hot tanked, seals, guides, valve job, and checked for flatness) by a local machine shop. I would not suggest replacing the valve(s) yourself. Remember, this is a painstaking process and you don't want to have to do it again anytime soon. Personally I would recommend www.partsdinosaur.com for all the rebuild parts.

Here's what I would replace other than the head itself:
-timing belt
-timing belt tensioner
-timing belt idler bearings
-H20 Pump
-Headgasket
-Head bolts

The headgasket and headbolts are a must as they are not reuseable! The OEM headbolts are a torque-to-yield design which means one-time use only. Depending on the mileage/condition of the car you may want to replace the oil pump.

Also, I'm not sure exactly where Brandon, MS is but I'm just a state over so feel free to bounce any questions you have my way. Goodluck!

 

[rcjr9186]

i agree with woody... i was only stating that if you are that 1 person in 1,000,000 you got lucky w/ no bent valves and no damaged pistons... but like he said b/c they share the same cylinder, the most likely circumstance is that you have come valve damage... now, yes this sucks but if you planned on doing any work to this car, this is a very oportune time to do it... since you have to take the engine apart you could take it to a machine shop for a 3 angle valve job and if you have any damaged pistons you could replace them w/ new forged pistons (i'd suggest slightly oversized so you can clean the walls) and up the compression or lower it for some boost.