'F' on the conrods...
25-04-2008, 09:21 AM
#1
'F' on the conrods...
when refitting the pistons should the 'F' be facing the flywheel end or the cam belt end? I stupidly thought that it said in the Haynes manual but it only refers to a arrow on the top of the pistons (which isnt there) or a casting mark (which also isnt here) so all I have to go by is the 'F' on the rods!
Any help would be great!
Any help would be great!
Trending Topics
25-04-2008, 06:07 PM
#9
Part of the Furniture
Join Date: May 2004
Location: The Netherlands
Posts: 179
Likes: 0
Received 0 Likes
on
0 Posts
But TBH I don't know which way the "F" has to face......
Good luck in finding out because when you have the rods and pistons in the wrong way it won't be running very nice......
26-04-2008, 11:22 PM
#16
10K+ Poster!!
iTrader: (1)
Join Date: May 2003
Location: Lancashire
Posts: 12,748
Likes: 0
Received 0 Likes
on
0 Posts
Yes it does. I am trying to think back to why they need to go back in the right way but it's been a while since I learnt all that.
IIRC it's something to do with centrally aligning the rod on the gudeon pin. which if fitted the otherway, might wear the bearings out unevenly and very quickly as it puts pressure on one side of the bearing as it isn't in line. It also puts pressure on the small ends which then also transfers onto the bore wall.
It's probably not a problem Ford engines suffer with as much as others but you never know. I always seem to remember them being pretty universal in the way that they go together but then I've always built them knowing which way to refit everything.
IIRC it's something to do with centrally aligning the rod on the gudeon pin. which if fitted the otherway, might wear the bearings out unevenly and very quickly as it puts pressure on one side of the bearing as it isn't in line. It also puts pressure on the small ends which then also transfers onto the bore wall.
It's probably not a problem Ford engines suffer with as much as others but you never know. I always seem to remember them being pretty universal in the way that they go together but then I've always built them knowing which way to refit everything.
27-04-2008, 12:08 AM
#17
I've found that life I needed.. It's HERE!!
Join Date: Oct 2007
Location: Straight outta Essex
Posts: 1,081
Likes: 0
Received 0 Likes
on
0 Posts
I am pretty sure the engine I have just stripped has never been apart before hence me saying the F is deffo to the front/cambelt side of the engine.
Keep us posted tho.
Keep us posted tho.
27-04-2008, 09:48 AM
#19
OK...... before i strip it down to rotate them round the right way...... Daveysaff on the top of the pistons there are 2 angled declines oposite each other that are offset, did these line up with the valves? ie one under the inlet and the other under the exhaust, or where they offset the other way? (sorry if its a bit confusing, hard to say what i mean).
Thanks!
Thanks!
Last edited by Karlos G; 27-04-2008 at 11:48 AM.
27-04-2008, 10:05 AM
#20
Yes it does. I am trying to think back to why they need to go back in the right way but it's been a while since I learnt all that.
IIRC it's something to do with centrally aligning the rod on the gudeon pin. which if fitted the otherway, might wear the bearings out unevenly and very quickly as it puts pressure on one side of the bearing as it isn't in line. It also puts pressure on the small ends which then also transfers onto the bore wall.
It's probably not a problem Ford engines suffer with as much as others but you never know. I always seem to remember them being pretty universal in the way that they go together but then I've always built them knowing which way to refit everything.
IIRC it's something to do with centrally aligning the rod on the gudeon pin. which if fitted the otherway, might wear the bearings out unevenly and very quickly as it puts pressure on one side of the bearing as it isn't in line. It also puts pressure on the small ends which then also transfers onto the bore wall.
It's probably not a problem Ford engines suffer with as much as others but you never know. I always seem to remember them being pretty universal in the way that they go together but then I've always built them knowing which way to refit everything.
27-04-2008, 11:15 AM
#21
PassionFord Post Troll
i fitted some pistons the wrong way when rebuilding (not that i knew it at the time) and had major piston slap! Sounded horrible, was like driving with totally dry lifters constantly
27-04-2008, 11:45 AM
#22
Why would you have piston slap? If the bores are fresh and the rings new shouldnt be any play no matter what way round they are surely?
But if you've both had it then maybe mine are the right way round cos the engine sounds sweet no knocks,taps or slaps
Now i'm just confused.... do i turn them round or not??!!!
But if you've both had it then maybe mine are the right way round cos the engine sounds sweet no knocks,taps or slaps
Now i'm just confused.... do i turn them round or not??!!!
Last edited by Karlos G; 27-04-2008 at 11:47 AM.
27-04-2008, 07:27 PM
#30
BANNED
BANNED
Join Date: Jun 2004
Location: LOCAL TO YOU
Posts: 791
Likes: 0
Received 0 Likes
on
0 Posts
two meanings >>>>>>>>
1--FOR-f**k sake!!!!!!!!!
2-FRONT OF ENGINE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!--- FLYWHEEL!!--HA-HA ---DONT GET ROCKER COVER CONFUSED WITH SUMP!!!!!------
1--FOR-f**k sake!!!!!!!!!
2-FRONT OF ENGINE!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! !!!!!!!!!!!!--- FLYWHEEL!!--HA-HA ---DONT GET ROCKER COVER CONFUSED WITH SUMP!!!!!------
28-04-2008, 10:54 AM
#33
PassionFord Post Troll
Join Date: Jun 2003
Location: Finland
Posts: 2,866
Likes: 0
Received 0 Likes
on
0 Posts
Having the conrods the wrong way aroun dis not totally the end of the world, but if you have the pistons too, then you would have the larger valve cutout for the exhaust valve, and the larger inlet valve would hit the too small exhaust valve cutout. I don't think the gudgeon pin is offset in a CVH? However, Zetec has it offset like 4x4cossie and of course all modern engine.
28-04-2008, 07:54 PM
#36
PassionFord Post Troll
Wouldn't have been worth the risk just twisting the rods as the rings probably would have gone out of the proper gapping and could have ended up causing compression problems 
28-04-2008, 09:31 PM
#37
haz87, yeah there was that risk but the chances of the gaps ending one above another is really low!! I would have risked it then done a comp test just to see.
But there isnt enough space to rotate them above the crank anyway so i'll have the head off....... again.... probably the 6th time in the last 2 years
Cheers jonnyrsturbo i hope so too mate!
But there isnt enough space to rotate them above the crank anyway so i'll have the head off....... again.... probably the 6th time in the last 2 years
Cheers jonnyrsturbo i hope so too mate!
Last edited by Karlos G; 28-04-2008 at 09:33 PM.
Thread
Thread Starter
Forum
Replies
Last Post