I have a 99 GS with a 420a short block and new internals. When i start the car up it has a knocking from the engine bay and then stops when it warms up. Anybody know what could be causing this
#95516, "RE: Knock when started" In response to Reply # 0
Is it a knocking, or a grinding? Is it a pronounced knock, or is it somewhat subtle?
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'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#95518, "RE: Knock when started" In response to Reply # 2
Just TOB noise, don't worry about it. They all do that at some point.
______________________________ If a sentence found online has 35% misspellings or greater and includes at least two racially charged expletives, chances are it is a YouTube comment.
'95 Eclipse TurboGS (garage deco) '95 TSi AWD (restoring a survivor) '97 Talon ESi-T (poor impulse control) '99 Eclipse RS-T (daily beater) '13 Evo X (mostly stock) '17 Sienna (Middle Aged Dad Mobile)
#95532, "RE: Knock when started" In response to Reply # 5 Jan-04-06 02:46 PM by shazow1969
What about the Clutch and Throw Out Bearing?? TOB will definately make some noise when cold, if it's bad that is.
-Kevin
________________________________________ 95 Eclipse RS - Rolled 96 Eclipse GS - Traded 95 Eclipse GSX- Sold 01 Blazer LS 4.3/5spd dropped and clean DD 88 Camaro RS 361 CID with a 6spd and a bar 10 second street car on motor.
#95614, "RE: Knock when started" In response to Reply # 6
IF it is the TOB, it will likely not make the noise when you press the clutch pedal. Try that. Did you rebuild with OEM pistons or forged pistons? Forged pistons will make a knocking sound until the car is warmed up also. Just a story... One time I cracked a piston and simply replaced it with a stocker, and it turned out my block had been previously bored to .020" over and it was slapping like mad, it was less audible after the car warmed up.... obviously I replaced it and it didn't slap anymore.
#95636, "RE: Knock when started" In response to Reply # 9
Forged pistons WILL knock. Perhaps it sounds grindish due to imperfections on the cylinder walls, but I think that is a little far fetched. Did you have the cylinders honed?
#95638, "RE: Knock when started" In response to Reply # 10
I left the car in the garage were it's warmer last night and then started it in the this morning to see if the noise continued. Well it has stopped so i guess that would just be the TOB disagreeing with the cold weather right?
#95657, "RE: Knock when started" In response to Reply # 11
Come to think of it, TOB noise is more of a grindish/rattle sound. When you start it cold, press the clutch pedal in and if it doesn't make the sound, that is your problem, no biggie.
#96611, "RE: Knock when started" In response to Reply # 13
Originally posted by Resol so this TOB .... mine does the same shit. Should i worry about it? Will it blow goin down the highway when i drive 1.5 hours to UTI every day?
mine rattles, always has... I've gone a few years with it rattling... it rattled before I had the trans rebuilt, and started after it was rebuilt because the trans shop guys are retarded.
If I can go that long like that and make 7 hour drives, you'll be fine.
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