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Old 26-06-2012, 18:54   #1
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4-108 1st 50 hrs service check over.

Unit from TAD with 50 hours on it. How critical is it to re-torque head?
Is Perkins the only engine that requires it?
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Old 26-06-2012, 19:48   #2
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Re: 4-108 1st 50 hrs service check over.

Re- torqueing the head on any new or rebilt engine, gas or diesel is standard procedure. The start up and run in heat and allow the bolts to loosen somewhat, and re-torqueing is required or at least sugested!! Maybe a Old Idea, but its well worth the trouble required in order to maintain the engines long life and to also mantain most warrentys. at least thats been what I was taught in school many years ago, and has worked for me and many others ! if nothing else it should give ya peace of mind!! Just my 2 cents
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Old 27-06-2012, 07:10   #3
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Re: 4-108 1st 50 hrs service check over.

I ended up needing 1 to 1-1/2 turns on most of the nuts to get the torque back to 60ft-lbs on my westerbeke 40, 4-108 block. I was on 25 hours after a complete rebuild.
Thinking about all the posts and youtube videos regarding warped heads, and blown head gaskets....I re-torqued them as soon as I hit 25 hours.
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Old 27-06-2012, 20:18   #4
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Re: 4-108 1st 50 hrs service check over.

Quote:
Originally Posted by phorvati View Post
I ended up needing 1 to 1-1/2 turns on most of the nuts to get the torque back to 60ft-lbs on my westerbeke 40, 4-108 block. I was on 25 hours after a complete rebuild.
Thinking about all the posts and youtube videos regarding warped heads, and blown head gaskets....I re-torqued them as soon as I hit 25 hours.
I re torqued at close to 1000hrs when we bought the boat. Most bolts took close to one full turn. After the torque I was concerned and lossened all back up and retorqued in 4 stages back to spec. I now have 7000+ hrs and she runs like a top...drips and all
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