[ryansdsm]

Hey guys i recently perchased a 95 eagle talon tsi fwd and it already had some mods including; clutch, safc2, 16g turbo, intake,fmic, msd dis2,exhaust, etc. when i bought the car it had some knock and i took it to the local performance shop and he said it was something in the head so i was just planning on having to rebuild the head, also the car was running like shit wouldnt accelerate very good and some stuttering problems. well today i was messing around with the msd ignition and noticed one of the wires was disconnected (crappy crimp caps) it was a green wire, well i connected it and it started to run alot better, it had no more rough idle and accelerated well but still some knock, so i took it out on the road and drove it and i accelerated to red line and then when i let off the gas the car died, but it started right up again and the knock went away for a little while.... until i got back to my shop and now its got a different knock it sounds like its coming from the bottom end and it alomost sound like and intermittent clunk it does it at idle and at accceleration now

any help would be greatly appreciated?

 

[antirice]

rod bearings

 

[91GSturbo16G]

Does the knock get louder and faster as you rev the engine? I would also vote on a rod bearing

 

[diambo4life]

Does the knock get louder and faster as you rev the engine? I would also vote on a rod bearing

I agree. If the "clunking sound" increases with RPM it's most likely the rod bearings. I would drop the oil pan asap and inspect the caps for play.

 

[ryansdsm]

sometimes the knock goes along with the acceleration and then sometimes it goes away, so i guess im going to drop the oil pan today.

thanks guys

 

[ryansdsm]

if it is the rod bearings am i screwed and just have to do a total rebuild or what can i do?

 

[antirice]

well when we or you say "rod bearings" dont think of them has like skateboard type bearings. all it is 2 peices of metal with oil in between them. there is no balls,no races, no nothing. so when your bearings go the little metal half moon things almost always spin upside down and your rod is just wearing on your crank. and i think thats why when you spin a rod bearing or break it or whatever you have to have your engine rebuilt. but im dumb and have no idea what im talking about so just dont read this.


also i think it costs alot cause they need to take the engine out and rip apart the block to take the pistons out.

 

[ryansdsm]

thanks for being a smart ass, dude i really appreciate your explanation of how a rod bearing works.



For all the people that arent dickheads,
i pulled the oil pan off today and of course #3 cylinder spun a rod bearing and #4 had some play but i took the bearings off and there was no damage to the crank. so i had one of our buddies from the local performance shop come over and have a look and he said the crank was fine, he said all i have to do is order some new bearings and put it back together, does anyone have any suggestions which brand of bearings to go with?

 

[White91GSX]

not to steal post but...i have a quesiton on replacing bearings.. can you replace them by just dropping the oil pan? or do u ahve to rip whole engine apart?

 

[Whiteonyx86]

you can leave the engine together, there's no need to rip it apart just to replace a rod bearing, it would be fun to watch though

 

[eddy90604]

yeah you can work on the engine from the bottom of the oil pan...just drop the oil pan and you will have access to your rods...yeah i spun a bearing too...and i shot my crank...so its not that bad...bearing will be like $100 maybe? from satan too...should be an easy fix.....btw? how do bearings get spun? high revs with too much heat? makes them melt? just my input...im guessing thats what causes it...

 

[antirice]

btw i wasnt trying to be a smart ass . sorry if i sounded rude

 

[Narco]

yeah you can work on the engine from the bottom of the oil pan...just drop the oil pan and you will have access to your rods...yeah i spun a bearing too...and i shot my crank...so its not that bad...bearing will be like $100 maybe? from satan too...should be an easy fix.....btw? how do bearings get spun? high revs with too much heat? makes them melt? just my input...im guessing thats what causes it...

Bearings most often fail due to oil starvation, foreign objects in the oil, improper installation, and just wear over time. Once they start going out, the problem gets progressively worse.

 

[reveal1123]

Are you sure its not your crank pulley? A bad crank pulley can sometimes cause the sound which you're descibing as a clunking noise. Why dont you take that off and inspect it or maybe run the car w/ out the pulley on for a little and see if the sound goes away. Besides, it has to come off anyway to get to the timing belt area.

If not, then it may be a rod bearing like everyone else is leaning on.

 

[ryansdsm]

yes, it is definatly a bad rod bearing #3 to be exact and #4 was about to go too so i will be ordering new bearings this week i will let you guys know how it turns out and thanks for the help