I need some help identifying an engine noise. Let me know if this is a major problem or something simple I can fix.... Here's the http://www.tampabay914.com/Sound/Run02082009.AVI...
-- Rob
It sounds like you need a valve adjustment or the rockers are worn bad.
> Need help with engine noise.
How's this: Braaaaaaaaa, bah bah bah, braaaaaaaaa!!!!
Sounds just like my car did when it sat for years. Mine had the following noises:
I have hydraulic lifters in mine. They had pumped down and stuck that way. Ran a quart of ATF through the engine at a fast idle for about an hour. Drained oil, re-filled with cheap oil and half quart of marvel mystery oil. Drove 300 miles or so. Changed the oil again with good diesel oil and it's been trouble free.
Fan belt was loose, rubbing on the fan housing. It made a similar sound.
My guess is valves out of adjustment if you have solid lifters.
Other than it idling high. there is some valve noise.
I still say like I did 2 months ago run it. Adjust the valves and run it. Quit worrying about it and run it.
Then I would run it some more. Maybe even race t.
If it blows it was bad
if it holds together run it some more.
Have I mentioned I would run it?
You may not be adjusting the valves correctly.
It should be fine, Run it.
Rich
I have to agree it sound like Valve adjustment is needed. Mine did sound a bit like yours after being stored. I did a valve adjustment and it was gone. I might want to change the vacuum hoses. Good Luck selling
Thanks guys, I'll get someone to look over my shoulder next time to make certain I'm adjusting them properly.... After that, hopefully I won't be bothered by the noise and I can drive it like I stole it.....
-- Rob
Nope, thats a rod... either small end or big end. The video makes it hard to tell, but it seems too fast paced for a valve train related issue
When did this start? any other symptoms?
Time to drain the oil through a paint strainer to see what comes out with it and pull the oil pick up strainer to see whats there as well..
It really sounds like a small end rod knock to me..
Pul each spark plug wire while the engine is running and see if any one of them makes the noise quieten down. If it does, thats the cylinder with the issue..
Jake I knew you would have the answer. I told Rob a while back to make an audio and send it your direction.
T.C.
Rob,
Rod.
Ya'll sould have heard it before he sealed up the exhaust.
I think it is noisy exhaust
Maybe you got a lopey cam
I crack me up......
Jake, thanks for the suggestions, I'll follow through and let everyone know...
TC, that's why I wanted to find out what the problem is before I sell it....
-- Rob
Well, since I couldn't figure out the noise, I decided to remove the engine and rebuild it... Here's where I'm today..... I can't figure out how to remove the main bearings or the cam bearings.... Also, does anyone see any problems yet? Tomorrow I'm planning to remove the con rods, then take the crank, cam, con rods to the machine shop for measurements.... Is there anything else I shoud take?
-- Rob
Cam and crank...
-- Rob
Rob, I'm meeting up with my motor guy today. I will ask him to come to the site, your thread and take a look for you. I know it's been a while since he's looked at a Type 4 since all he builds now is 911 motors, but he's got 2 good eyes. I'll let you know what he says.
T.C.
We won't know squat till he pulls the rods.
the center main bearing is hard to make out. I can't tell if that is copper or oil.
My bet is oil and will be waiting for the "I told you so" opportunity shortly.
If you remember I said it was exhaust leaks. so far I am right.
I removed the con rods today, what a PITA....
Then I cleaned the con rods..... and guess what I found.....
wait for it....
wait for it....
I don't think I'm suppose to move this with my finger.....
So Jake was 100% correct and I'm glad that I tore the engine down before I caused major damage....
Jake, thanks again for your knowledge and assistance....
I knew it....
I told you the day we picked the car up. The guy said it made a knocking noise. I said "rod".
So how loose WAS it? Like push hard with your finger it comes out? (no noise)
or tip the rod on it's side and it just falls out. (pretty good noise).
It was exhaust and it will be again if you don't fix it right.
Lets get some pictures of the big end bearings.
Turned sideways and it fell out....
I'll get some pics of the big end bearings tonight....
-- Rob
Big end bearings...
-- Rob
Big end bearings...
-- Rob
Rob,
I was gonna say the #3 rod bearing big end, but I'm glad you found it!
who are you using in Lakeland for your machine work?
Do you have a pic of the piston pin? and is the bushing still tight in the rod end?
KP
All you got left is cleaning and put it back together
Don't allow that rod to be rebuilt without the small end bore size being inspected. The loose bushing may have worn the bore of the rod and that may cause the same issue with the replacement bushing in a short time..
Glad you found it.
Told ya so :-)
Look our way if you need real assistance..
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