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Old 12-07-2015, 09:32 PM   #1
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Default New Head on engine

I have hurd a few timest that if you are going to replace just the heads of an engine that you will without a doubt blow the engine up, im curiouse if you guys think that this is true?
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Old 12-07-2015, 10:43 PM   #2
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Nope-

Are you doing the work yourself? Cause either way it matters who performs the job.
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Old 12-08-2015, 04:55 PM   #3
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yea no....

Are you having issues with the engine in your truck?
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Old 12-08-2015, 07:26 PM   #4
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That might be true if you are planning to thrash on your engine (exposing the weakest link,) but if you drive like an adult, then everything should be fine.
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Old 12-08-2015, 09:42 PM   #5
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Quote:
...but if you drive like an adult...
I think I missed drivers ed that day
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Old 12-09-2015, 08:17 PM   #6
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Well if you have say a chev 350 with close to 200k and you put on new heads then yes there is a chance of blowing your rings or other bottom end damage.

Same engine with 100k or less and you put new heads then your probably going to be ok.

Simply if your ready for a rebuild don't do it one half at a time.
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Old 12-10-2015, 01:38 AM   #7
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Why would replacing the head(s) have any affect on other portions of the engine? Like they are just the next thing to wear out or the actual head replacement is causing damage??
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Old 12-10-2015, 05:58 AM   #8
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The components wear together. Putting a new top end helps seals better causing more strain on the weaker older components.
I have been taught that from the training school as that is why.

However I have only come across it happening only 1 time that I can think of in almost 25 years. That was on a friends 1970 Mach 1. He had the heads rebuilt and the bottom end went out the oil pan.

I have personally experienced some broken items from putting in a bigger camshaft in a engine and doing nothing else. Was super awesome for awhile on both cars lol. My GTO punched a rocker threw the valve cover and my Datsun 510 came home running on 1 cyl. Yep 1 cylinder. I learned were every slight incline was on the drive home in that.
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Old 12-10-2015, 12:11 PM   #9
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Where is the OP at?........

1 cyl.? I thought that would be impossible. That's like running a weed eater. Man what the hell was that like?
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Old 12-11-2015, 05:11 AM   #10
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Originally Posted by hardbodyhero View Post
Where is the OP at?........

1 cyl.? I thought that would be impossible. That's like running a weed eater. Man what the hell was that like?
It was slow and pretty much floored the whole time. I think a weed eater would have had more power.

Was kinda neat on the rebuild. The new cam had snapped right behind the tower. Slight warp to the head and block.

Then went wild on the machining and parts with a new credit card. Paid the card off 3 years after the car was gone lol.

Was a strong little engine when done.
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