Engine hydralocked

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crcram
Posts: 2
Joined: Sun Mar 28, 2021 9:50 pm
Car: 2003 Nissan 350Z

Engine hydralocked

Postby crcram » Mon Mar 29, 2021 7:59 am

03 350z ingested water and locked engine. Removed plugs and cleared cylinders, changed oil and filter. Now runs but has clatter. Sounds like coming from upper area near cyl.#2. On a pushrod engine would suspect bent push rod, damaged rocker arm or lifter. Removed valve cover and timing cover. No obvious damage.
Any ideas as to what is causing the noise? Don't want to pull the head and find nothing.
Thanks


User avatar
VStar650CL
Posts: 2760
Joined: Thu Nov 12, 2020 1:25 pm
Car: 2013 Nissan Altima 2.5 SL
2004 Nissan Altima 2.5 S

Re: Engine hydralocked

Postby VStar650CL » Mon Mar 29, 2021 9:24 am

Hydrolocking rarely affects the top end or timing components. It's the sudden stop at the top of an intake stroke that does the damage, and that shock is exclusively transmitted to the bottom end of the stopped cylinder. Most likely you're looking at a slightly-bent connecting rod on #2.

crcram
Posts: 2
Joined: Sun Mar 28, 2021 9:50 pm
Car: 2003 Nissan 350Z

Re: Engine hydralocked

Postby crcram » Mon Mar 29, 2021 5:44 pm

Was afraid of something like that. Hope the rod can be removed w/o pulling the engine.
Thanks for your advice.

User avatar
VStar650CL
Posts: 2760
Joined: Thu Nov 12, 2020 1:25 pm
Car: 2013 Nissan Altima 2.5 SL
2004 Nissan Altima 2.5 S

Re: Engine hydralocked

Postby VStar650CL » Mon Mar 29, 2021 5:51 pm

Wish it was happier news, but you're most welcome.


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