pls help golf tdi knocking

pezza · 07-31-2008, 01:34 PM

my golf 4 gt tdi (51) has a loud (matalic,heavy) random knocking noise once or twice every 10 - 25 secounds from the top of engine i think (sum1 else said clutch area ?) when cold on tick over ,once driven seems fine. when it happends the engine rocks a little harder for a splt secound or miss's a beat? (miss fire). other wise fine once warm. oils fine and car just serviced. pls help thx.

**SABL** · 08-01-2008, 09:17 AM

Hi pezza,

A little more info would be helpful for the members:
Year of manufacture?
Mileage?
Is the "check engine" light on?
Type of engine (gas/diesel) and size?

With any info you can provide you will be helping the members of this forum.

Thanks and best of luck,
SABL

With a little research I found that this car is a diesel...I believe.

**Raylo** · 08-01-2008, 04:49 PM

Hey SABL, he said it was a TDi so that means it is a diesel. I thought those were supposed to knock. ;-) Not sure about you guys but I know next to nothing about diesels, however, I think we might all be learning in a few years as the new high mpg clean diesels get more common.

BUDFAN8 · 08-02-2008, 10:48 PM

sounds like an injector is leaking down while the engine is off. when the injector doesnt spray fuel to a diesel it will get a knock sound from the top end. the injector not spraying would also cause the engine to shake from the miss. only easy way to find the miss with it being diesel is to unplug the injectors while the miss is occuring and listening for engine change. other than that you will have to pull them out and have them pressure tested to see if one is leaking.

Bud.

07-31-2008, 01:34 PM	#1 (permalink)
pezza Registered User Join Date: Jul 2008 Posts: 1 OS: xp	pls help golf tdi knocking my golf 4 gt tdi (51) has a loud (matalic,heavy) random knocking noise once or twice every 10 - 25 secounds from the top of engine i think (sum1 else said clutch area ?) when cold on tick over ,once driven seems fine. when it happends the engine rocks a little harder for a splt secound or miss's a beat? (miss fire). other wise fine once warm. oils fine and car just serviced. pls help thx. Last edited by pezza; 07-31-2008 at 01:36 PM.

08-01-2008, 09:17 AM	#2 (permalink)
SABL Moderator Relaxation Room Join Date: Jul 2008 Location: Galena, Ohio Posts: 1,244 OS: WinXP SP3	Re: pls help golf tdi knocking Hi pezza, A little more info would be helpful for the members: Year of manufacture? Mileage? Is the "check engine" light on? Type of engine (gas/diesel) and size? With any info you can provide you will be helping the members of this forum. Thanks and best of luck, SABL With a little research I found that this car is a diesel...I believe. Last edited by SABL; 08-01-2008 at 09:25 AM. Reason: added comment at end of message

08-01-2008, 04:49 PM	#3 (permalink)
Raylo TSF Enthusiast Join Date: Feb 2006 Location: Maryland, USA Posts: 525 OS: XP Desktop, Vista HP Notebook, XP Notebook	Re: pls help golf tdi knocking Hey SABL, he said it was a TDi so that means it is a diesel. I thought those were supposed to knock. ;-) Not sure about you guys but I know next to nothing about diesels, however, I think we might all be learning in a few years as the new high mpg clean diesels get more common.

08-02-2008, 10:48 PM	#4 (permalink)
BUDFAN8 Registered User Join Date: Apr 2007 Posts: 205 OS: XP	Re: pls help golf tdi knocking sounds like an injector is leaking down while the engine is off. when the injector doesnt spray fuel to a diesel it will get a knock sound from the top end. the injector not spraying would also cause the engine to shake from the miss. only easy way to find the miss with it being diesel is to unplug the injectors while the miss is occuring and listening for engine change. other than that you will have to pull them out and have them pressure tested to see if one is leaking. Bud.