A little mishap...

A//// Guy · 10-17-2003

My car decided to act funny starting wednesday.. I thought it was just bad gas so I drained it and such...

That wasnt the problem though.. the car went from missing a little on wednesday to knocking at idle on thursday- knocking like you can hear it crunching away...

So then yesterday it just wouldnt start... so I took the timing belt off today and discovered that the crankshaft gear skipped 4 teeth... sending timing way out of the norm. Im going to replace the T-belt because i think it stretched.. and the main gear too because its old and kind smooth on the ended of the teeth..

Well next week I should have together again but well see... I dont think any valves met pistons so it should be ok.. just timing was so off that it wouldnt run right at all.

Just wanted to share my dsm joys. :dsmrule: :bs:

-Peter

john · 10-18-2003

That sucks. I can give you a used timing belt. It has a groove running up one edge. Also, I have a snapped b-shaft belt if you want to use that also. Both belts only have 20,000 miles. Should last another 40,000. j/k

Raptor · 10-18-2003

Sorry to hear about that Peter.

As far as valves hitting the pistons, I have that cool little tool known as a boroscope that will tell you for sure without pulling the head if you are curious. All we need is to pull the plugs and go right in through there. Let me know if that interests you.

A//// Guy · 10-18-2003

Mike- I forgot you had that, that would be sweet to just to check it out. Can we set something up for next week?

Im leaving to go up north in an hour or so.. Ill be back on Sunday so I can talk to you then. Glad to hear your feeling better too.

92tsiawd84- haha no, thanks for the generous offer but Ill go get a new one. :P

Raptor · 10-18-2003

Anytime next week is fine Peter, just let me know what works for you. And thanks, I do feel much better!

Matt D. · 10-18-2003

Wouldn't a simple compression test be easier than sticking something down the intake in this case?

Jakey · 10-18-2003

Quote:

Originally posted by Matt D.@Oct 18 2003, 12:58 PM
Wouldn't a simple compression test be easier than sticking something down the intake in this case?

Wouldn't it be possible for there to still be some damage but yet run good compression numbers?

Matt D. · 10-18-2003

Quote:

Originally posted by Jakey+Oct 18 2003, 01:29 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Jakey @ Oct 18 2003, 01:29 PM)</td></tr><tr><td id='QUOTE'> <!--QuoteBegin-Matt D.@Oct 18 2003, 12:58 PM
Wouldn't a simple compression test be easier than sticking something down the intake in this case?

Wouldn't it be possible for there to still be some damage but yet run good compression numbers? [/b][/quote]
My thought is if the pistons kissed the valves in any way they'd be bent and wouldn't allow for very good compression at all if he previously had good compression.

CVD · 10-18-2003

Thats my thinking.

if the valves did hit, then it would be good for checking how bad the damage is, and seeing if you need new pistons before you start opening things up.

Jakey · 10-18-2003

Quote:

Originally posted by Matt D.+Oct 18 2003, 01:44 PM--></div><table border='0' align='center' width='95%' cellpadding='3' cellspacing='1'><tr><td>QUOTE (Matt D. @ Oct 18 2003, 01:44 PM)</td></tr><tr><td id='QUOTE'>

Quote:

Originally posted by Jakey@Oct 18 2003, 01:29 PM
<!--QuoteBegin-Matt D.

Quote:

@Oct 18 2003, 12:58 PM
Wouldn't a simple compression test be easier than sticking something down the intake in this case?

Wouldn't it be possible for there to still be some damage but yet run good compression numbers?

My thought is if the pistons kissed the valves in any way they'd be bent and wouldn't allow for very good compression at all if he previously had good compression. [/b][/quote]
I wasn't sure if there was any sort of tolerance built in for valve damage = lower compression.

Raptor · 10-18-2003

it is worth it to do both, but seriously you already have the plugs out to do a compression test, wouldn't it be nice to actually look at the pistons rings and cylinder walls if you have that capability? Visual inspection is nice and is an easy way to figure out for sure if there was piston to valve interference. Not to mention if you pay attention while you are in there other things could be spotted as well such as damage to the piston top from detonation etc.

john · 10-18-2003

You plan on doing all of these tests after the new belt is on right? Dont want it to skip anymore. Doens the car not even crank when you try to turn it over?

Raptor · 10-19-2003

The boroscope can be done before the belt. The engine doesn't need to be turned over for that, it is just visual inspection. If that shows there is no significant damage or indication of valve to piston impact, redo the timing belt then do the compression test to verify things are in order. If however there is valve to piston impact, it will show up with the boroscope test and I would pull the head at that point and check the valves to make sure they are seating properly and not bent.

A//// Guy · 10-19-2003

Yea sometime this week we can do the boroscope... Possible earlier this week, maybe Tuesday, Ill have to see how things go... cant put it back together anyway because I have to go get the new parts from Mitsu... Or maybe you can come over before Shooters if people are going and check it out and then we could go down there... whatever works.

If nothing shows on the Boroscope than Ill put it all together and see what is shoots for compression #'s and be doen with it...

When we were checking things out before we took stuff apart, my dad wanted to hear the noise adn how the car ran, so he started it while I wasnt there and then I came out there and tried to start it and it cranked and stopped... so Im not sure if it skipped another tooth on the last startup and then it was too much for timing to start the car or if things were hitting and not letting it start... well see what happens.

Raptor · 10-19-2003

Tuesday or Wed either one. 952-292-7254 give me a call if you want and we can figure out when for sure. Keep your dad away from it for a few days

A//// Guy · 10-19-2003

LOL well my dad wanted to here the knocking, so he started it and he said it was really loud but I told him the lifters tick pretty loud so maybe thats what he was hearing... Mobil 1 sucks ass for lifter tick. But anyway so he shut it down.. then we tried started it again and it was weird... but we pulled the plugs and spun the engine and it did.. so under load it wouldnt... so I dont think anything was hitting, it just couldnt start because timing was way off.

A//// Guy · 10-27-2003

Well last wednesday Mike-Raptor came over with the boroscope and we determined that valves did slightly touch the pistons. So on Friday I put it back together, just the T-belt and balance belt and we checked compression with nothing else put together. Compression in all 4 cylinders was 150. If any of them were under 140-145 I would rebuild the head....

But since compression was good, on saturday I put the rest back together and started it up. It started and I drove it and it vibrated like MAD... couldnt go over 3k because it felt as if it would fall apart...

So had to pull everything apart again on Sunday and everything looked lined up, well I skipped the step that determines if the right balance shaft was lined up right (it is behind the Oil pump assembly and is run by the gear...

So anyway put it all back together again and had success, car ran smooth as ever and it seems to be good to go. Got lucky with the Valves.

Thanks for help again Mike.

If anyone needs help with a Tbelt I think ive become certified this past weekend.

Matt D. · 10-27-2003

Good to hear, Peter. Hopefully you'll gain some more power out of this.

john · 10-27-2003

Nice to hear it is running fine.