Blown engine?

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ssava
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Blown engine?

#1

Post by ssava » 03 Mar 2018, 20:23

Was driving down the highway when a series of loud
‘Clunks’ came from the engine followed by it turning off at 70mph. I pulled her over and tried to start her back up. But white smoke came from the oil cap.
I checked the dipstick and there was much more oil than should have been there. And it was yellow. Like coffee.
A couple more tries and she stopped turnin over altogether

My friends say it’s head gasket. Maybe? Bent piston too?

I’m told it’s easier and cheaper to replace the engine. Plus it’ll come with a warranty.

Any advice?

She wasn’t running hot. All was fine up until it wasn’t.
5E7BA49E-49C5-40B9-AE2E-E76FEA5CE4B0.jpeg
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"Esmerelda"
'67 Cougar XR7 purchased September, 2017 to work on with my twin (14) year old boys
Franklin, TN

ah923
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Re: Blown engine?

#2

Post by ah923 » 03 Mar 2018, 21:17

At the least a blown head gasket maybe more. If it's the "born with" engine I would be inclined to have it rebuilt; if not you'll have a big decision as to how many "ponies" you want to put under the hood.

Joe

DieselD
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Re: Blown engine?

#3

Post by DieselD » 03 Mar 2018, 21:20

Doesn’t sound promising. Best bet is to drain the oil and see what comes out. Sounds like it might have coolant contamination which could indicate a head gasket issue or worse. Also I would pull the plugs and turn the engine over by hand to see if it’s hydrolocked from coolant entering the cylinders or if it’s locked up from a mechanical failure.

Which way your repair it will depend on the extend of the damage and how set you are on the original(assuming it may be) engine going back in.
1968 Standard, 302 2v, 3 speed.

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ssava
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Re: Blown engine?

#4

Post by ssava » 04 Mar 2018, 06:20

Going to ( on friends advice) check plugs and look under valve covers this morning.

Someone on instagram local to me has a Windsor 351 for $500.

Or should I look into a crate engine?

Any recommendations?
"Esmerelda"
'67 Cougar XR7 purchased September, 2017 to work on with my twin (14) year old boys
Franklin, TN

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ssava
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Re: Blown engine?

#5

Post by ssava » 04 Mar 2018, 08:52

0F9C126D-61A6-49A0-8EB8-01B26C194167.jpeg
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This is what the inside of my valve covers look like.
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"Esmerelda"
'67 Cougar XR7 purchased September, 2017 to work on with my twin (14) year old boys
Franklin, TN

Sir Ed
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Re: Blown engine?

#6

Post by Sir Ed » 04 Mar 2018, 09:56

Yup. Blown head gasket.
1967 Standard, 289 4 barrel

SPLINEHEAD
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Re: Blown engine?

#7

Post by SPLINEHEAD » 04 Mar 2018, 10:13

Ssava, put a socket and wrench on the crank pulley bolt with the plugs out and see if you can turn the engine over by hand. 1/2" or 3/4" drive on the ratchet works best.

Good luck to you sir!

Gary Hill
Pole Cat
1969 XR7 390 S code 4bbl C6 3.0 TrueTrac rear end

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ssava
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Re: Blown engine?

#8

Post by ssava » 04 Mar 2018, 12:19

SPLINEHEAD wrote:
04 Mar 2018, 10:13
Ssava, put a socket and wrench on the crank pulley bolt with the plugs out and see if you can turn the engine over by hand. 1/2" or 3/4" drive on the ratchet works best.

Good luck to you sir!
Okay. A few questions.
1) Where's the crank pulley bolt?

2) How do I turn the engine over by hand?
"Esmerelda"
'67 Cougar XR7 purchased September, 2017 to work on with my twin (14) year old boys
Franklin, TN

CATHOUSE
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Re: Blown engine?

#9

Post by CATHOUSE » 04 Mar 2018, 12:26

The lower pulley on your engine is the crank pulley. The bolt that holds it in place is in the very center of it. It will need a larger size socket, I forget exactly what size. Something like 15/16. Depending upon the length of your socket you may need to also use a short extension. Then put a breaker bar on the extension, place the socket on the bolt head and try to move the breaker bar. You should be able to move the it in both directions if nothing is wrong inside your engine. Before you try to turn the breaker bar you will need to put the transmission in neutral so be sure to block your tires to prevent even bigger problems.

Randy Goodling
CCOA #95

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Re: Blown engine?

#10

Post by xr7g428 » 04 Mar 2018, 12:59

Most likely what has happened is a head gasket failure between the water jacket and an oil passage. That let coolant mix with the oil. Since water is heavier than oil it went to the bottom of the oil pan where the oil pump pick up is located. Water makes a lousy coolant. It probably caused a bearing failure at the crankshaft. Many times the bearing, sort of a bronze looking sleeve, will stick to the metal of the crank shaft and spin with the shaft causing untold havoc. It really sucks. If this is the case, then you would want to rebuild the engine replacing all of the internal bearings. This is a big job and one you would probably want to farm out.
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Currently in the Cat House
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