C4 Tech/Performance L98 Corvette and LT1 Corvette Technical Info, Internal Engine, External Engine

Guys, I Need Some Helpful Advice... :(

Thread Tools
 
Search this Thread
 
Old 08-03-2009, 08:21 PM
  #1  
D0St0V3L
Advanced
Thread Starter
 
D0St0V3L's Avatar
 
Member Since: Dec 2008
Location: Orange CA
Posts: 76
Likes: 0
Received 0 Likes on 0 Posts
Default Guys, I Need Some Helpful Advice... :(

Alright well my engine is all jacked up, making some bad knocking noise. My buddies say it's a "main bearing" and I could use a "valve job"... whatever the hell that is, either way, for me that means I need a lot of money....

I have about $1500 in a savings account, but I still owe $4000 on my car, and since my divorce 2 years ago this has become my only driver. What should I do? Keep saving and pay it off and try to get another ride, do an engine swap, or just rebuild the engine???? I can probably save up enough to pay the car off in another 3 or so months if needbe...

I guess I would like to swap something else in there if I can find a good deal on an engine, and a shop that can do it for a reasonable price... Hell I don't know...
Old 08-04-2009, 02:59 AM
  #2  
Pwnage1337
Tech Contributor
 
Pwnage1337's Avatar
 
Member Since: Oct 2008
Location: Custer, WI
Posts: 3,729
Received 188 Likes on 141 Posts

Default

I would say rebuild it. 350's are so common i bet some mechanics could do it in their sleep.

If you're looking for more power, have them bore/stroke it to a 383
Old 08-04-2009, 03:50 AM
  #3  
lt4obsesses
Le Mans Master
 
lt4obsesses's Avatar
 
Member Since: Dec 2006
Location: H-Town Texas
Posts: 5,139
Received 481 Likes on 261 Posts

Default

Really, it depends on alot of factors. First and foremost, are you a do it yourselfer, or paying someone to do it. If you do it, you might make it in your budge. However, if paying, $1500 is about halfway there.

The swap is quicker perhaps, if again you do it yourself and find a motor in your budget that isn't about to spin a bearing or throw a rod. Then your back to step one w/ no money.

The other factor is damage. How bad is the damage to the crank, the block, etc.? The crank could be ground and oversized bearings put in. I believe the options are .01 and .02. If beyond the .02 mark you'll need a new crank. I had one put in from CRI (Crankshaft Rebuilders Inc.) My brother did it so I got the family discount. So far so good. He did get a really good set of Clevite bearings from one of the guys at the shop. Labor was 16 hrs. Normal customer this job would have been about $500 parts and $2000 labor, give or take.

But if you can do this yourself your on the road for under a grand. Perhaps with that you could pick up a good steel crank.

The other option, which I briefly considered was just buying a beater and waiting till I had the money to build a stroker. My cars an only driver too and I owe alot more than $4K. But the quote my brother gave me worked out better in my case, as the car was already on the lift in his stall.

Last edited by lt4obsesses; 08-04-2009 at 03:53 AM.
Old 08-04-2009, 07:15 AM
  #4  
floridamale
Safety Car
 
floridamale's Avatar
 
Member Since: Jan 2008
Location: Vero Beach Florida
Posts: 3,939
Likes: 0
Received 1 Like on 1 Post

Default

First off what year? and what is the mileage? Are you able to start the car now? Did you try to find where the noise was located at top, bottom, front or rear of motor, I had a precat come loose in the exhaust once and it can sound like the bottom end is bad. Get your self a long wooden dowel and listen for where the sound is coming you will hear it if you listen in different spots if the car will start. Do a compression test also do a cylinder leak down test.
Old 08-04-2009, 07:31 AM
  #5  
Weav's Vet
Safety Car
Support Corvetteforum!
 
Weav's Vet's Avatar
 
Member Since: Dec 2007
Location: Sandhills of North Carolina
Posts: 3,616
Likes: 0
Received 5 Likes on 4 Posts
Default

Originally Posted by lt4obsesses
The other factor is damage. How bad is the damage to the crank, the block, etc.? The crank could be ground and over sized bearings put in. I believe the options are .01 and .02. If beyond the .02 mark you'll need a new crank. I had one put in from CRI (Crankshaft Rebuilders Inc.) My brother did it so I got the family discount. So far so good. He did get a really good set of Clevite bearings from one of the guys at the shop. Labor was 16 hrs. Normal customer this job would have been about $500 parts and $2000 labor, give or take.
If it is a main I'd have it looked at. I had a '74 GMC that spun a front main at 40K miles. I put an oversize bearing in it an put 150K on that motor. It just depends. How does your buddy know it needs a valve job? Might just need seals if it is smoking at start up. That can be fixed easily. Have someone you can trust take a look at it. Might get you buy for a while until you can get something done on a more permanent basis. Good luck!
Old 08-04-2009, 08:29 AM
  #6  
pianoguy
Safety Car
 
pianoguy's Avatar
 
Member Since: May 2007
Location: Apple Valley MN
Posts: 3,651
Likes: 0
Received 10 Likes on 8 Posts

Default

I spun a rod bearing this spring on my LT4. I was lucky and it didn't cause any other damage to the engine. I got a couple of quotes in the $3-4000 range, and a dealership said it would be $5500 minimum. I pulled the engine myself and took it to a shop to be repaired. They completely disassembled, inspected and cleaned the engine, ground the crank, installed all new bearings, a new rod, oil pump and timing chain, decked the heads, installed new valve seals and reassembled the engine for about $1600, which while not cheap, I felt was reasonable (I don't have any mechanic relatives - LOL!) - you might be able to do better. If you need machine work and a rotating assembly, the price goes up of course. Member LBYRNES recently rebuilt his LT1 with little prior experience - you may want to talk to him.

A new short block might be a good alternative - I've seen stock LT1 short blocks as low as $1200 on ebay.
Old 08-04-2009, 11:10 AM
  #7  
lt4obsesses
Le Mans Master
 
lt4obsesses's Avatar
 
Member Since: Dec 2006
Location: H-Town Texas
Posts: 5,139
Received 481 Likes on 261 Posts

Default

Originally Posted by pianoguy
I spun a rod bearing this spring on my LT4. I was lucky and it didn't cause any other damage to the engine. I got a couple of quotes in the $3-4000 range, and a dealership said it would be $5500 minimum. I pulled the engine myself and took it to a shop to be repaired. They completely disassembled, inspected and cleaned the engine, ground the crank, installed all new bearings, a new rod, oil pump and timing chain, decked the heads, installed new valve seals and reassembled the engine for about $1600, which while not cheap, I felt was reasonable (I don't have any mechanic relatives - LOL!) - you might be able to do better. If you need machine work and a rotating assembly, the price goes up of course. Member LBYRNES recently rebuilt his LT1 with little prior experience - you may want to talk to him.

A new short block might be a good alternative - I've seen stock LT1 short blocks as low as $1200 on ebay.
Yes, I am very grateful for my brother. I told him if he ever needed anything I would drop whatever I was doing to help. Paint his house, unclog a toilet, whatever. If it were not for him I would have had to go the "beater" route and the Vette would still be parked.

Pianoguy's solution is the best if you can get the engine pulled and transported to a shop. Parts on the L98 shouldn't be hard to come by and should be relatively inexpensive. One thought would be to do the part shopping yourself in terms of crank, rods, oil pump. You might find a better deal and be able to upgrade for the same money?.
Old 08-04-2009, 05:15 PM
  #8  
88flyer
Advanced
 
88flyer's Avatar
 
Member Since: Jun 2003
Location: miramar florida
Posts: 58
Received 0 Likes on 0 Posts

Default

Do yourself a favor and have some one look at it and then you can plan accordinly, don't go chasing all wild leads that you hear, it'll drve you crazy.
good luck
Old 08-04-2009, 05:16 PM
  #9  
Chatman
Drifting
 
Chatman's Avatar
 
Member Since: Feb 2003
Location: Davis CA
Posts: 1,616
Received 156 Likes on 102 Posts

Default

This is my advice. Buy something simple and reliable for about $1000 cash -- maybe a 94 Taurus -- get liability insurance, drop your comprehensive coverage on the Vette, and take your time deciding what you would like to do.

In all likelihood, you are more likely to find a solution that you like over the next 2 or 3 months than making a decision this week. When your car is running again, you can resell the cheap car and very likely lose nothing. I believe that you would need approval to drop comprehensive, so make certain that you can. Personally, I would go the cheap car route regardless.
Old 08-04-2009, 05:32 PM
  #10  
engle1147
Le Mans Master
Support Corvetteforum!
 
engle1147's Avatar
 
Member Since: Jul 2007
Location: Tampa Florida
Posts: 5,043
Likes: 0
Received 6 Likes on 6 Posts
Default

The situation sounds like trouble if it is a high mileage car...if you have bearing/crank damage the fix will be more to get through it then what you currently have in your account....plus you be out of a ride during the repair/rebuild time. Figure out what is wrong exactly before you jump in.

Old 08-04-2009, 09:19 PM
  #11  
arbee
Melting Slicks
 
arbee's Avatar
 
Member Since: Feb 2003
Location: Saskatoon Sask.
Posts: 2,081
Received 546 Likes on 354 Posts

Default

Originally Posted by Chatman
This is my advice. Buy something simple and reliable for about $1000 cash -- maybe a 94 Taurus -- get liability insurance, drop your comprehensive coverage on the Vette, and take your time deciding what you would like to do.

In all likelihood, you are more likely to find a solution that you like over the next 2 or 3 months than making a decision this week. When your car is running again, you can resell the cheap car and very likely lose nothing. I believe that you would need approval to drop comprehensive, so make certain that you can. Personally, I would go the cheap car route regardless.
If you are using this car as a daily driver and only have 1500.00 to fall back on, you could be in for a lot of mental pain. These cars are fun to drive and fun to work on, but they are old and anything can happen at any time. Case in point - yesterday I travelled to my job in northern Alberta in my 92. It had never given me any trouble for the last year. 300 miles from home, I blew a head gasket. 1000.00 for a tow home, 350.00 for a taxi for the rest of the trip, and 400.00 for a flight home at the end of my turnaround. Not fun.
Old 08-05-2009, 04:32 AM
  #12  
lt4obsesses
Le Mans Master
 
lt4obsesses's Avatar
 
Member Since: Dec 2006
Location: H-Town Texas
Posts: 5,139
Received 481 Likes on 261 Posts

Default

Originally Posted by 88flyer
Do yourself a favor and have some one look at it and then you can plan accordinly, don't go chasing all wild leads that you hear, it'll drve you crazy.
good luck
After all that has been said and suggested, you must realize that none of us have seen or heard the engine. So we are simply going of the "suggestion" that a spun bearing is the problem. Of course loud knocking from the bottom end is seldom anything else. But the only real way to know is to see. The solution could be as simple as a bearing replacement or as involved as a complete rebuild. That's a pretty big spectrum.

Someone suggested dropping your full coverage. I am pretty sure that the bank will more than frown upon this. I wouldn't do it anyway. There are alot of things that could happen even just sitting in the drive. Or if you have it sitting in shop at some point. Who knows, but I just think that is an awful big risk for very little reward.

But, buying a driver. Then gradually accumulating the parts you really want to build the Vette you really want isn't a bad plan at this point. Really, if you had planned on any performance mods this is a great opportunity. If it's all coming apart anyway, that is time and/or money already spent. It's just a matter of quality and performance of the stuff going back in.
Old 08-05-2009, 02:15 PM
  #13  
GKK
Safety Car
 
GKK's Avatar
 
Member Since: Jan 2004
Location: Northern California
Posts: 3,783
Likes: 0
Received 11 Likes on 11 Posts

Default

Have a Reputable repair shop properly diagnose your engine and then go from there. Guessing won't help anything.

Get notified of new replies

To Guys, I Need Some Helpful Advice... :(




Quick Reply: Guys, I Need Some Helpful Advice... :(



All times are GMT -4. The time now is 10:02 AM.