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Zack

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Alright this thread is being started a little premature but I already have findings sort of.
The car had a bad tick and low compression in #6 as diagnosed by Pat.
Also it wouldn't pull more than 15 inches of vacuum.

Here is fix #1:



Lol I put my finger over it and poof 20 inches of vacuum.
I drove the car home 4 hours today and I honestly don't have a clue what's 'wrong'
It runs and idles great. Gonna do my own compression testing next weekend then go from there. Would really sucked if I cant find anything wrong. :drums:

There were 6 marauders at the house today. :D
 

Silverback

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Zack, just exactly what is that part in the picture? I don't recognize it.

Wait, is that the vacumn/boost guage?

Concerning the tic, it started on the trip back from MV9, noticed it in Arkansas, very loud. Continued ticking from Oct '011 to early March '012. Did not drive it during this time except to warm up the motor and see if it was still ticking. Did a compression test, in Oct, and #6 was much lower than the rest, which were all within a pound of each other. Gas economy went down too.

In early March, I went to warm up the car and low and behold the ticking had stopped. I did another compression test and the #6, was still low.


Pat
 

Zack

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Yes its the line in back of the boost gauge.
Ill start on your car by Monday.....got a hectic week in front of me!
 

Zack

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I have the blower off, pipes, intake and cam covers.

I will compression test it Friday and verify Pat's results.
This car runs way too good to have a dropped valve seat.

Cam covers go in for powdercoating tomorrow.
 

Zack

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Im this far:


Gonna pop the heads off this weekend and pray I dont see a bad piston in hole #6.
If so, Ill pop the engine out and throw another piston/rod assembly in it and go.

If the heads get done before next Friday, it will be rolling by sunday....god willing.
 

breeze

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#7 lost comp. And #8 pulled threads on plug. Heads are off and driver side valve is bent. Dropped off at machine shop today.
 

Silverback

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Whose Car??????

#7 lost comp. And #8 pulled threads on plug. Heads are off and driver side valve is bent. Dropped off at machine shop today.
Breeze; are you talking about my car, Silverback, or someone else's, it's a little bit confusing.
 

Zack

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I got the heads off today and found nothing wrong with either head or pistons.
The valves had oil on the back side so we know the seals are shot. Gonna have the heads done and put it back together. Im also having both exhaust valve seats replaced in the #8 hole for piece of mind.
Ill take pics tomorrow...I was busy building a pad for our hot tub today.
 

Burt Ragio

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Whe you checked & found a bent valve did you have to pull each valve from the head or are there other ways to check for bent valve when not so obbious ?
 

Zack

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Heads are on and both exhaust valve seats in #8 were replaced.....proactively.
 

Zack

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Have you done the compression check yet? Will be interesting to see the results.
No I didnt bother. He got 240psi results in 3 of 4 cylinders and 160 in the 'suspected' hole.

Its impossible to get 240psi first of all and have a car that runs excellent to boot.

Ive driven enough Marauders, broken and not to know when something is wrong.

The heads were done and the shop found NOTHING wrong. The piston and bore is in PERFECT condition. The timing components all look great.

I will tell you the valve seals were completely hosed though.
 

SC Cheesehead

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No I didnt bother. He got 240psi results in 3 of 4 cylinders and 160 in the 'suspected' hole.

Its impossible to get 240psi first of all and have a car that runs excellent to boot.

Ive driven enough Marauders, broken and not to know when something is wrong.

The heads were done and the shop found NOTHING wrong. The piston and bore is in PERFECT condition. The timing components all look great.

I will tell you the valve seals were completely hosed though.
So the valve seals and the vacuum leak were the only issues? That's a good thing, yes?
 

Zack

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So the valve seals and the vacuum leak were the only issues? That's a good thing, yes?
YEP.
The ticking could have been as simple as a piece of carbon on the piston top or a partially blocked lifter oil feed hole.

No parts in the heads were worn when disassembled.
 

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