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Loud rattling in new-to-me car

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aefriot
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Year and Model: 2007 XC70 2.5t AWD
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aefriot

Loud rattling in new-to-me car

Post by aefriot » Fri Mar 08, 2019 6:22 pm

NOTICE, for short version: Please go to paragraph 2 :) This paragraph give insight as to my purchase. My wife took on a new job out of the house and needed a vehicle. We decided on an AWD car. Subaru came to mind and I started looking. Well, I found a very nice looking and very clean 2007 XC70 Volvo with 183,000 miles. It is an online auction car. Bought with only as seen through the internet and a series of very lovely pictures showing how straight and clean the vehicle was. There was also a link to a vehicle report that showed 2 owners and no accidents. So far so good! The vehicle was a 6 hour drive from me and was out of the question to check out the running condition without knowing a possible final price. We took a chance and waited for the auction to see how much (or little) the vehicle would sell for. We can purchase running used engines within an hour from here for $650-800 with under 150,000 miles. New water pump, timing belt and incidentals brings the price up to $1,200 for a running replacement engine. How much time will it take me to replace the engine? I work a little slow so I figure 2 days of relaxing engine work to replace the engine. A transmission would be half this cost and the same time. So...the car has a trade-in value of $2,775 and retails for $5,725. I'm not a retail kind of guy so I'll use the trade-in value of $2,775. $2,775 - $1,200 - tires ($600) - 2 days labor (My wife says she isn't going to pay me) - transport costs ($200)= $775. If I can get this car for less than $775, I'll be golden! We bought the car for $700!

I had never started the car before purchasing it and was quite nervous as to what we would hear upon starting the engine. I turned the key and it appeared to turn much slower than our V8 truck. But it did start with a lot of noise and a rough idle. I turned the engine off after that sinking feeling that you get as you first understand the situation is not in your favor. I checked the oil and the coolant. Both are normal and of normal levels. I remove the spark plugs and find 4 of the 5 in good condition but the #4 cylinder had mechanical damage. I perform a compression test on all cylinders and 1,2,3,5 are 140-145 psi. #4 cylinder was at 0 psi. I stuck a stiff wire down to the top of the piston and had my wife turn the engine over. The piston went down! Whew! It's not a broken rod! Now, what would cause damage to a spark plug, make lots of noise and leave no compression in the cylinder? An out of synch camshaft would damage valves in all cylinders would it not? A broken valve spring would drop a valve to be hit by the piston. A head of one of the valves broke off. A loose valve keeper would allow a valve to drop into the cylinder to be hit by the piston. Nothing I can think of says I don't need to remove the head. Perhaps I'll just start simple and remove the valve/camshaft cover first to look for something amiss.

Any suggestions?

Thank you



Marcobrick
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Re: Loud rattling in new-to-me car

Post by Marcobrick » Fri Mar 08, 2019 6:43 pm

I seem to recall a story on the forum about a P2 car ingesting a ball bearing check valve from the pcv system also resulting in mechanical damage.


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abscate
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abscate

2007 XC70 Loud rattling in new-to-me car

Post by abscate » Fri Mar 08, 2019 8:09 pm

Get down to Utica and pick up a used engine for $500 from Erie VoVo

Stop in here for a coffee. If you find a place to work down here we have an engine cherry picker here too.

Figure two weekends to do a first Volvo engine swap.

You need to do a crashing cram on P2 Volvo. Most every module is married to your VIN number so be careful with those modules.


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aefriot
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Joined: Fri Mar 08, 2019 4:43 pm
Year and Model: 2007 XC70 2.5t AWD
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aefriot

Re: Loud rattling in new-to-me car

Post by aefriot » Sat Mar 09, 2019 9:21 am

I'm in the process of tearing the head down now. I'm to the point where I need a cam locking tool. Off to make that now....



aefriot
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Joined: Fri Mar 08, 2019 4:43 pm
Year and Model: 2007 XC70 2.5t AWD
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aefriot

Re: Loud rattling in new-to-me car

Post by aefriot » Sat Mar 09, 2019 2:05 pm

Not good. I checked for bad clearances in the #4 cylinder. Brought #4 piston to the top and started it back down about an inch. Pushed down on the piston with a long screwdriver. It easily went down 5/16". Guess it's definitely going to have to be pulled from the vehicle.

I checked online at Erie Vo-vo for a crankshaft or an engine. No luck. I will call Monday to speak to a person to see if I can get a good engine at a good price. I know I can get one closer to me, but if I can save a money by traveling further or get an engine with fewer miles for the same money...I'm for that.

Pull the engine and check it for what kind of wear it has. I'm assuming the lower end of the connecting rod may have come loose and allowed it to raise up enough to whack a couple valves. I rented an inspection camera, but it's mirror was too large to enter the cylinder through the spark plug hole. A $30 inspection camera attached to my cell phone looks like a great option now.



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abscate
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abscate

Re: Loud rattling in new-to-me car

Post by abscate » Sat Mar 09, 2019 3:41 pm

For a 2007 give Randy at Randall Volvo in Albany a call. I pass through your way on the way up to Montreal every month and could trailer it up on a trip if I can drop and retrieve my trailer on the way back.


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2 Volvos
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7 Drivers
8 Boats- with a big pointy metal thing on top

1999 V70 T5M 56 2005 V70 NA M56 VWs BMW

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