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> Loud Knock - Very Scared, Need Help Immediately
gfulcher
post Dec 9 2005, 07:37 PM
Post #41


Diagnosis: Automobilitus. Prognosis: Terminal
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Knocking? Oh yeah - I had that in my 2.6L four some time ago..

I think my photo gallery speaks volumes.. Hopefully, it's not what I experienced.

2.6L Big Four Failure

Good luck!

-greg-
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Al Meredith
post Dec 9 2005, 07:58 PM
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could be broken valve spring. I had it happen, used a rusted spring and it broke.
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Nor.Cal.914
post Dec 9 2005, 10:50 PM
Post #43


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Well I'm getting my car back home tomorrow from where it was left at my friends house. As soon as it's back in the garage, I'm going to begin the tear down. I'll take the valve covers off first like you guys said to check for any obvious damage. I'll take some pics too so I can show everyone how it looks. I'll get back to everyone once the car is home and the valve covers are popped off. Thanks
-Chris
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Nor.Cal.914
post Dec 9 2005, 10:54 PM
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Just looked at your 2.6L motor failure Greg. That sucks that something like that had to happen. I'm hoping nothing like this has happened with my motor (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif) That would mean lots of time out of a car! Well I'll let you all know what turns up. Thanks again
-Chris
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Nor.Cal.914
post Dec 10 2005, 02:08 PM
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Ok well I got my car home about 1/2 hour ago and put her up on jacks. I've been trying to pull my heat exchanges off for probably that whole time and they've been giving me hell. But I was able to pull off the passenger side valve cover. It looked fine to me, but I have to wait until my dad gets home to have him look at it. I'll take pics in a little while to show how it looks. I should have both valve covers off with some pics in a few hours. Thanks
-Chris
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brp914
post Dec 10 2005, 02:39 PM
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YIKES - STOP - dont take off those heat exchangers. Asking for big trouble. If its too late and you've stripped the stud out of the head, there is unused thread further up in the head, but you have to get a longer stud. That will buy you some time. Otherwise, trying to put in a helicoil with the engine installed can be done, but is easy to mess up, in which case your head may be toast. If the engines is coming out anyway, have all those studs checked/replaced. It would be a heart breaker to rebuild the engine, install it, strip the studs out, and then have to remove and dismantle the engine again. 914 heads are made of mushy alloy.
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Nor.Cal.914
post Dec 10 2005, 02:43 PM
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My heat exchangers aren't the nice SS ones that I see for sale on rare occasions. I have the pain in the butt header, heat exchanger, muffler setup. Three seperate pieces. So I don't have to worry about stripping the head bolts out because I'm not unbolting the headers. I should've said this before so people didn't get worried. Well I'm going to go get back to work and get some pics up. Thanks
-Chris
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bd1308
post Dec 10 2005, 03:13 PM
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that would be the only reason i'd prefer them over the early setup.

plus with the late setup, you could do your own thing with those stub pipes and not have to use the HE's....

b
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Nor.Cal.914
post Dec 10 2005, 03:17 PM
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Just pulled my supertrapps off . . . Look what fell out (IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif) This cannot be good . . .
-Chris


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Nor.Cal.914
post Dec 10 2005, 03:18 PM
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Little chunks of metal . . . Anyone know what these could possibly be from? Please let me know. Thanks
-Chris


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bd1308
post Dec 10 2005, 03:33 PM
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oh shit...

thats *NEVER* good.

i'd say a piston and something else did a freaky mating ritual in your engine

(IMG:http://www.914world.com/bbs2/html/emoticons/ohmy.gif)

b

edit: okay. allan is probly right..i can see.
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Allan
post Dec 10 2005, 03:40 PM
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You pulled your mufflet off and that fell out?

Could just be pieces of the exhaust gasket...
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brp914
post Dec 10 2005, 03:44 PM
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could be a former valve seat. stop messin' around with those exchangers and pop off the valve covers. I'm guessing theres a lotta play on one of those rocker arms.
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Nor.Cal.914
post Dec 10 2005, 03:52 PM
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My dad guessed one of my valves made contact with the top of one of my pistons and caused it to sheer off and send it's pieces out my exhaust. I pulled off the passenger side's valve cover and everything looked ok. But I'm going to go see if everything is nice and tight. When I replaced my plugs about 2 weeks ago, one plug was wet on the passenger side . . . have to check which cylinder. I'm hoping these pieces are just a broken valve and only that. I'm going to have to spend a lot of time taking apart the motor now to get down to the heads. I have to pull my carb off, intake, take apart the linkage, then pull the tin off the top of that side. So wish me luck! I'll get back on how everything feels as far as the rocker arms. Thanks
-Chris
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McMark
post Dec 10 2005, 04:44 PM
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Looks like a valve seat to me. (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)

If a valve broke off and the spring retainer remained in place, it's possible that everything you'll see under the valve covers will look okay. But if you do a compression test I think you'll find a zero compression on one cylinder.
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Dave_Darling
post Dec 10 2005, 07:22 PM
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You'll also hear it as a "dead spot" in the starter sound. "RR-RR-RR-..-RR-RR-RR-.." BT,DT.... (IMG:http://www.914world.com/bbs2/html/emoticons/sad.gif)

--DD
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Nor.Cal.914
post Dec 10 2005, 07:24 PM
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We made excellent progress today. Got everything apart, now tomorrow we're going to take the head off. Everything did look ok under the valve covers and nothing felt loose so I'm hoping it is just a valve seat and won't be too tough of a fix. I also found a bunch a gunk on top of my cylinders . . . could this be a possibility of why my car is running hot? My temp gauge goes all the way up to the red when it's only been running for 15 minutes at the most. I'll post some pics tomorrow with some daylight and show this gunk that I'm talking about. Thanks
-Chris
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Brando
post Dec 10 2005, 07:32 PM
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The temp gauge reads oil temp... Check your oil cooler on the engine when you get the motor out -- is it all gunked up?
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Nor.Cal.914
post Dec 10 2005, 07:38 PM
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Top and bottom both looked clean to me when I was under the car earlier. I took off the tin covering it and it looked fine from above as well. Thanks for telling me what the temp gauge actually did I never knew if it was engine or oil temp. Is there any other reason why the temp gauge could be going up so quickly? I'll look at the oil cooler again tomorrow to make sure it's nice and clean. Thanks
-Chris
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Nor.Cal.914
post Dec 10 2005, 07:43 PM
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Isn't the temperature sensor on top of the heads though? That's the only reason why I would question it reading oil temp. But since I'm sure you're right, any possibility you could explain how it reads oil temp? Let me know. Thanks
-Chris
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