Engine building question
10-06-10, 11:21 PM
#1
Engine building question
So I'm building my first engine, a 13 B 4 port for my SA, anyway the tension bolts from the engine I tore down appears to be mismatched.
The difference is in the length of the threads. Some of them have threads that are approx. 28 mm and some are only 16 mm.
I'm thinking that with torque specs and all, is this a problem?
Replacements would be a couple hundred so what do you say?
The difference is in the length of the threads. Some of them have threads that are approx. 28 mm and some are only 16 mm.
I'm thinking that with torque specs and all, is this a problem?
Replacements would be a couple hundred so what do you say?
10-07-10, 09:13 PM
#3
talking head
in the bottom left of every engine ( from behind ) ,, outside the bell housing pattern
BUT its not unheard of that when dowelled
some builders will retap the front plate deeper,, and use more of these longer M headed bolts where all the dowels are
if there is no M,, and the bolts are different lengths,, then someone has used 12a bolts,, and they should be about 20mm shorter than the others
BUT its not unheard of that when dowelled
some builders will retap the front plate deeper,, and use more of these longer M headed bolts where all the dowels are
if there is no M,, and the bolts are different lengths,, then someone has used 12a bolts,, and they should be about 20mm shorter than the others
10-07-10, 10:36 PM
#4
I know about the one bolt that is longer, that is not what I am concerned about, I have the one long bolt just as I should have, the issue is with the remaining bolts. Some of them are different in that they have longer threads, the actual length of the bolts are the same, its just that some of them have been threaded a greater distance and I am concerned that it may make a difference with the torque specs.
10-08-10, 12:51 AM
#5
talking head
well the bolts do change a bit over the years,, some get longer threads, some get ribbed centres, others get rubber bonded centres
myself,, i still TQ the SD engine ones all the same
,,, 25 pounds force per foot in your lingo
or 34 newton meters for the rest of the world
but meh-- how would i know ??
myself,, i still TQ the SD engine ones all the same
,,, 25 pounds force per foot in your lingo
or 34 newton meters for the rest of the world
but meh-- how would i know ??
Trending Topics
10-08-10, 04:05 PM
#8
and a replacement set wouldn't cost you a couple hundred bucks, more like $5. most of us have dozens and dozens of sets of tensions bolts lying around. i have a box that literally weighs about 80lbs with nothing but tension bolts in it, with scattered sets here and there as well.
10-08-10, 09:29 PM
#9
talking head
myself,, i still TQ the SD engine ones all the same
,,, 25 pounds force per foot in your lingo
or 34 newton meters for the rest of the world
,,, 25 pounds force per foot in your lingo
or 34 newton meters for the rest of the world
and a replacement set wouldn't cost you a couple hundred bucks, more like $5. most of us have dozens and dozens of sets of tensions bolts lying around. i have a box that literally weighs about 80lbs with nothing but tension bolts in it, with scattered sets here and there as well.
10-08-10, 10:02 PM
#10
Is it ok to use tension bolts that do not match (in this case some have longer threads)
in the same engine?
in the same engine?
they came out of a once running engine,, what makes you think they don't go back in???
Actually I just want to make sure that I don's put something in that is not A# 1, Would like the new engine to last really long time.
Thread
Thread Starter
Forum
Replies
Last Post
trickster
2nd Generation Specific (1986-1992)
25
07-01-23 04:40 PM
