Reply
 
Thread Tools Search this Thread Display Modes
 
Old 02-03-2020, 12:15 PM   #1
Senior Member
 
Dave_E's Avatar
 
City: La Conner, WA
Vessel Name: Agnus Dei
Vessel Model: 36' Shin Shing
Join Date: Sep 2014
Posts: 276
New Engine Bolts?

Hi All,


Replacing the head gasket on my Lehman 120. Took off the manifold (only broke one bolt) to find all the bolt threads were nicely coated with Nickle Never seize (or something like it). I'm guessing these are regular steel bolts and not stainless? I gave a couple of them the wire wheel treatment and they look like new. I'm thinking I'll clean them up and reuse them unless someone comes up with a good reason not to.


Any other tips from those of you who have done this operation would be appreciated! Thanks


Dave
__________________
Advertisement

__________________
GOD, Family, career
Dave_E is offline   Reply With Quote
Old 02-03-2020, 12:32 PM   #2
Guru
 
psneeld's Avatar
 
City: Ft Pierce
Vessel Name: Freedom
Vessel Model: Albin 40
Join Date: Oct 2011
Posts: 23,631
No reason not to reuse them, even the head bolts are reusable.


The manifold bolts may be a fairly common size so finding them cheap might be possible...head bolts not so much as American Diesel wanted something like $20-$50 per bolt. Can't remember exactly but I was shocked.
__________________

psneeld is offline   Reply With Quote
Old 02-03-2020, 01:30 PM   #3
Guru
 
City: Boston
Vessel Name: Adelante
Vessel Model: IG 30
Join Date: Nov 2016
Posts: 1,205
They are most likely grade 5 carbon steel. Note that most torque tables will specify torque for a lightly lubricated bolt. I generally replace all bolts. If PO overtorqued them they may not have full strength and would be more susceptible to breaking. They are inexpensive so why chase pennies.
SoWhat is online now   Reply With Quote
Old 02-03-2020, 01:38 PM   #4
Guru
 
Portage_Bay's Avatar
 
City: Coupeville Wa.
Vessel Name: Pelorus
Vessel Model: Californian 42 LRC
Join Date: Oct 2015
Posts: 1,321
Quote:
Originally Posted by Dave_E View Post
Hi All,


Replacing the head gasket on my Lehman 120. Took off the manifold (only broke one bolt) to find all the bolt threads were nicely coated with Nickle Never seize (or something like it). I'm guessing these are regular steel bolts and not stainless? I gave a couple of them the wire wheel treatment and they look like new. I'm thinking I'll clean them up and reuse them unless someone comes up with a good reason not to.


Any other tips from those of you who have done this operation would be appreciated! Thanks


Dave

If you replace them don't use stainless. As a generalization steel is stronger than stainless steel. And the torque specs you will be following are for a specific grade of steel.
Portage_Bay is online now   Reply With Quote
Old 02-03-2020, 04:10 PM   #5
Guru
 
City: San Diego, CA
Vessel Model: 42' Uniflite Double Cabin
Join Date: Jul 2017
Posts: 537
You should be able to tell the type of bolt by the markings on the head. You can find charts online to decode the meaning from the markings.
sbman is offline   Reply With Quote
Reply

Thread Tools Search this Thread
Search this Thread:

Advanced Search
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off



» Trawler Port Captains
Port Captains are TF volunteers who can serve as local guides or assist with local arrangements and information. Search below to locate Port Captains near your destination. To learn more about this program read here: TF Port Captain Program





All times are GMT -5. The time now is 05:00 PM.


Powered by vBulletin® Version 3.8.8 Beta 4
Copyright ©2000 - 2021, vBulletin Solutions, Inc.
Search Engine Optimization by vBSEO 3.6.0
Copyright 2006 - 2012
×