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| h27a Ratte when let off throttle https://auszookers.com/forum/viewtopic.php?f=5&t=57374 |
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| Author: | Wolf [ Mon Oct 03, 2022 4:04 pm ] |
| Post subject: | h27a Ratte when let off throttle |
Picked up a NGV Saturday with the 2.7, Changed the oil today as the kld was dirty as and replaced with 10w40 shell, Now when I use the throttle I hear a rattle on decel. it does have a bung coil atm but when it was missfiring before the oil change I never heard the rattle. Cheers |
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| Author: | tanshi [ Wed Oct 05, 2022 3:17 pm ] |
| Post subject: | Re: h27a Ratte when let off throttle |
timing chain replacement |
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| Author: | Bruce [ Wed Oct 05, 2022 4:13 pm ] |
| Post subject: | Re: h27a Ratte when let off throttle |
100% agree with tanshi. Timing chain |
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| Author: | Wolf [ Thu Oct 06, 2022 5:11 pm ] |
| Post subject: | Re: h27a Ratte when let off throttle |
would an oil change make it appear? |
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| Author: | fordem [ Fri Oct 07, 2022 12:15 am ] |
| Post subject: | Re: h27a Ratte when let off throttle |
It can, depending on the oil & filter you use - the chains have hydraulic tensioners, too thick an oil and you won't get the flow you need (and consequently the pressure) at the tensioner, so it rattles, use a filter without an anti-drain-back valve and the oil drains back when the engine is off, same result. |
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| Author: | Wolf [ Fri Oct 07, 2022 8:48 am ] |
| Post subject: | Re: h27a Ratte when let off throttle |
I got my partner to rev the car last night and I had a listen around thr car. Sound wasent premenant in the engine bay and wasent loud at all when I had my ear to the engine. sounded like it was comming from around the transmission area. maybe loose heatsheild |
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| Author: | Gwagensteve [ Fri Oct 07, 2022 10:14 am ] |
| Post subject: | Re: h27a Ratte when let off throttle |
Or a disintegrating catalytic converter. |
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| Author: | Wolf [ Fri Oct 07, 2022 1:08 pm ] |
| Post subject: | Re: h27a Ratte when let off throttle |
Gwagensteve wrote: Or a disintegrating catalytic converter. Seeing as it thew 0420 and 0430 and was missfiring may well be. ill try ask around if anyone has a scope i know to have a look down the o2 sensor hole |
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