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head removal


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#1 alec OFFLINE  

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Posted May 25, 2015 - 02:55 PM

I am going to take my head off my 12 hp 300421 briggs

I am told that if I am careful I can reuse my gasket

what is the best way to take it off ? any tips or tricks ? thanks guys :beerchug:


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#2 LilysDad OFFLINE  

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Posted May 25, 2015 - 03:07 PM

Just be sure to use a torque wrench to remove the bolts. :thumbs:  :smilewink:


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#3 classic OFFLINE  

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Posted May 25, 2015 - 03:21 PM

Loosen the bolts a little at a time each until tension is off of them. Retorque in the same manner in the pattern Briggs specifies. After running the engine, retorque the head after the engine cools. It may take up to three heat up, cool down, retorque sequences. I've seen plenty of warped aluminum heads on these Briggs engines.
The other option is to just unbolt the head, do what you have to do, and just bolt it back on to "that should do it" specs... I don't recommend it.
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#4 classic OFFLINE  

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Posted May 25, 2015 - 03:35 PM

Here's a Briggs model 23R6D head that's been taken off and put back on multiple times since 1956 and is badly warped. Even some of the head bolt bosses are dished because washers were missing from the head bolts. I'm in the process of rebuilding the engine completely and the block, gear reduction assembly, governor linkage, and intake manifold are the only parts that can be reused.

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#5 alec OFFLINE  

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Posted May 25, 2015 - 04:37 PM

will the head just lift off at that point ? will there be any tapping with a hammer or prying involved ? first time with a small engine . 



#6 Bolens 1000 OFFLINE  

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Posted May 25, 2015 - 04:48 PM

For what they are brand new you may just be better buying a brand new gasket, they are $ 7.98

Head gaskets were never recommended to be reused by any engine manufacture ............


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#7 LilysDad OFFLINE  

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Posted May 25, 2015 - 04:50 PM

When you reuse the gasket, coat it with aluminum paint.

 

 

 

Edit;  Er, yeah! What he said!


Edited by LilysDad, May 25, 2015 - 04:51 PM.

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#8 propane1 ONLINE  

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Posted May 25, 2015 - 04:51 PM

Unbolt in the same sequence as you would when you put them back in and torque them down. Find the sequence in a manual for that engine. Should always put a new gasket on, but we do what we have to do at times to make something run. I have reused gaskets before. Yes, you may have to tap or pry. Use some thing other than a steel hammer to tap. Plastic, wood, rubber hammer. Noel.
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#9 KC9KAS OFFLINE  

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Posted May 25, 2015 - 04:55 PM

For what they are brand new you may just be better buying a brand new gasket, they are $ 7.98

Head gaskets were never recommended to be reused by any engine manufacture ............

I agree 100%!


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#10 JDBrian OFFLINE  

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Posted May 25, 2015 - 05:15 PM

I'm a big believer in careful prep of the head and the block surfaces to make sure they are as clean and flat as possible. Sometimes hard carbon can get deposited on the block from a leak that has been happening for a while. That needs to be totally removed to make sure you get a good seal. Definitely use a new gasket.  If both surfaces are flat and in good condition you shouldn't need any pastes to fill in the gaps. 


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#11 boyscout862 OFFLINE  

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Posted May 25, 2015 - 05:29 PM

You can download the manual for free. Use a new gasket and follow the torque sequence in the manual. Reusing a head gasket is something to attempt only in emergencies when a new one is not available. Good Luck, Rick

 

Try this manual:  http://gardentractor...ines-1919-1981/


Edited by boyscout862, May 25, 2015 - 05:33 PM.

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#12 alec OFFLINE  

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Posted May 25, 2015 - 08:18 PM

For what they are brand new you may just be better buying a brand new gasket, they are $ 7.98

Head gaskets were never recommended to be reused by any engine manufacture ............

does that include shipping mr bolens ?



#13 Bolens 1000 OFFLINE  

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Posted May 26, 2015 - 06:16 AM

Shipping will be $3.00

If your interested send me a PM


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#14 alec OFFLINE  

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Posted May 28, 2015 - 09:39 AM

got it off and back on ( froze exhaust valve ) has compession and runs . ( not bad for a junk engine that I got with a pile of tractor )


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