If a cyl bore is .5 over, what size h.g. you use?
29-11-2004, 05:06 PM
#1
DEYTUKURJERBS
Thread Starter
If a cyl bore is .5 over, what size h.g. you use?
Quick 
I presume if they only do headgaskets in std size and oversize every mm, and your engine is only 0.5mm overbore, you use the 1mm overbore headgasket yea? Not the std size?
I presume if they only do headgaskets in std size and oversize every mm, and your engine is only 0.5mm overbore, you use the 1mm overbore headgasket yea? Not the std size?
29-11-2004, 05:11 PM
#3
DEYTUKURJERBS
Thread Starter
I thought slightly too big is better than slightly too small as a lil lip inside the bore would promote det at that point, surely?
Anyone else?
Mike, ring Harvey for me
Anyone else?
Mike, ring Harvey for me
29-11-2004, 05:18 PM
#4
PassionFord Post Whore!!
Join Date: May 2003
Location: Wiltshire UK
Posts: 3,795
Likes: 0
Received 0 Likes
on
0 Posts
no way do you want ANY firering overhang into the bore, the gasket needs to be FULLY supported over the whole area, so if there is any doubt, then use the next size up.
There is generally a fair amount of spare space in a headgasket bore, and I'd be surprised if +0.5mm won't go ok.
There is generally a fair amount of spare space in a headgasket bore, and I'd be surprised if +0.5mm won't go ok.
)
29-11-2004, 05:33 PM
#6
PassionFord Post Whore!!
Join Date: May 2003
Location: Wiltshire UK
Posts: 3,795
Likes: 0
Received 0 Likes
on
0 Posts
no not really steve, stick with standard if u can, provided there is no overhang at all into the bore. It's equally as bad to have a thin space around the bore where the larger gasket is setback, this allows potential for unburnt or poorly burnt mixture to hide and upset the combustion process.
29-11-2004, 05:36 PM
#7
DEYTUKURJERBS
Thread Starter
Aaaah feck
I dont know if there is any overhang
And its middle of night in NZ so cant ask
I wanted to sort this so could order h.g. like, now...
Whats the chances of any overhang?
I dont know if there is any overhang
And its middle of night in NZ so cant ask
I wanted to sort this so could order h.g. like, now...
Whats the chances of any overhang?
Trending Topics
29-11-2004, 05:42 PM
#9
DEYTUKURJERBS
Thread Starter
Its NOT a skyline question, its an ENGINE question.
No point me asking on the Skyline forum as nobody would know. Esp as none of em use same block as me
Anyway, you on about 20k Kitcars all the time on a Ford Forum
No point me asking on the Skyline forum as nobody would know. Esp as none of em use same block as me
Anyway, you on about 20k Kitcars all the time on a Ford Forum
29-11-2004, 05:48 PM
#12
DEYTUKURJERBS
Thread Starter
No no no, he can get me a HG, he was going to, but i can get some super mega bargain ones, but i need to know like, now, otherwise thats it, the deal is gone...
I cant ask him till about midnight cause of the time difference.
He wanted me to order 6 for him. He told me the bore of mine, but i didnt ask anything else (ie which to get ) as it didnt occur to me the gaskets dont come in 0.5s, i didnt check till jus now....
I cant ask him till about midnight cause of the time difference.
He wanted me to order 6 for him. He told me the bore of mine, but i didnt ask anything else (ie which to get
) as it didnt occur to me the gaskets dont come in 0.5s, i didnt check till jus now....
29-11-2004, 07:07 PM
#18
Regular Contributor
Join Date: Nov 2004
Posts: 283
Likes: 0
Received 0 Likes
on
0 Posts
I would bet lots of money on the fact that you are not taking any risk, involving overhang. Theres a need for quite big tolerances when it comes to head gaskets, as the fitment could vary a bit. I would say, generally, +-1mm is no problem. Thats my opinion anyway 
Thread
Thread Starter
Forum
Replies
Last Post
Johnny Knoxville
General Car Related Discussion.
4
30-09-2015 07:21 AM
SMILER258
Restorations, Rebuilds & Projects.
36
28-09-2015 09:04 AM
