| Slant Six Forum https://slantsix.org/forum/ |
|
| Lower End Knock https://slantsix.org/forum/viewtopic.php?t=39307 |
Page 1 of 1 |
| Author: | oldwood [ Sun Mar 07, 2010 8:26 pm ] |
| Post subject: | Lower End Knock |
I bought a non running '63 Valiant that supposedly just needed a timing chain. Seller(preacher) didnt tell the truth. The motor was locked up. Pulled the head and replaced pistons and rings with new ones. Honed cyls and put in new clevite rod bearings. Old main bearings looked good and checked one main and it looked good. I replaced timing chain and gears and oil pump, new valve seals. I torqued everthing to specs. I got it running and everthing sounded good at idle and when reving it up. However you put it in gear(automatic) and it has a lower end knock. So i pulled the engine and looked at the mains and rods and everthing looked good ie. no brass showing on bearings. So what am I missing??? |
|
| Author: | DusterIdiot [ Sun Mar 07, 2010 8:29 pm ] |
| Post subject: | TQ Bolt |
Are all the torque convertor bolts tight? Sometimes if one is a bit loose it can sound like a knock. -D.Idiot |
|
| Author: | oldwood [ Sun Mar 07, 2010 8:38 pm ] |
| Post subject: | |
That was my first check hoping one was loose. No such luck. |
|
| Author: | ceej [ Sun Mar 07, 2010 8:40 pm ] |
| Post subject: | |
Small end rod bearings. Check the wrist pins. CJ |
|
| Author: | oldwood [ Sun Mar 07, 2010 9:07 pm ] |
| Post subject: | |
I'll give and update tomorrow when I pull the crank out and mic the journals. The new pistons came with new pins. When you have this kind of problem you want something to be obvious. |
|
| Author: | Mike'68Dart [ Sun Mar 07, 2010 9:32 pm ] |
| Post subject: | |
Beware of the "new" oil pump. I know of several people that have had oil pump drive gear failures very soon after installing a "new" pump. The drive gears are too soft, and get eaten away very quickly. This might not be your current problem, but may show up way too soon. |
|
| Author: | oldwood [ Sun Mar 07, 2010 9:43 pm ] |
| Post subject: | |
Yea I read that in some of the posts on this site. I would have used the old oil pump but I couldn't get the relieve valve out of the housing. I did keep the old pump for the gear that was in good shape. I bought this car because it was in good shape and not a rust bucket to sell to someone to get into and old car inexpensively for car shows. My labor and material costs are going to eat my lunch. I can't turn back now. Damn the torpedoes, full speed ahead. |
|
| Author: | Charrlie_S [ Mon Mar 08, 2010 3:45 am ] |
| Post subject: | |
Check the crankshaft end play. |
|
| Author: | Dart270 [ Mon Mar 08, 2010 5:56 am ] |
| Post subject: | |
Also make sure to check if the harmonic balancer has split down the keyway. That happened to me on my first buildup and it sounded just like a rod knock at low idle in gear. Lou |
|
| Author: | nuttyprof [ Mon Mar 08, 2010 8:48 pm ] |
| Post subject: | |
Also check flexplate to crank bolts. I had that happen once, thought a main was gone, but was quiet in neutral. |
|
| Page 1 of 1 | All times are UTC-08:00 |
| Powered by phpBB® Forum Software © phpBB Limited https://www.phpbb.com/ |
|