Posted By |
Discussion Topic:
head gasket
-- page:
1
2
|
|
runningon8 |
11-19-2016 @ 6:55 PM
|
|
|
Member
Posts: 44
Joined: Oct 2016
|
After thinking I had a stuck ring or valve it seems I have a blown head gasket. No compression on #3 cylinder and #2 has bubbles around plug even after replacing and tightening plugs. I see bubbles in radiator too.I have no water in crankcase or steam in exhaust. Does this sound like a blown head gasket? I know these engines have a tendency to blow them if this is what I have what are the best gaskets to replace and who carries them?
|
alanwoodieman |
11-19-2016 @ 7:26 PM
|
|
|
Senior
Posts: 868
Joined: Oct 2009
|
what year or style of engine? 21 stud, A, 59A, 8BA?
|
runningon8 |
11-23-2016 @ 5:45 AM
|
|
|
Member
Posts: 44
Joined: Oct 2016
|
21 stud, 1936 LB. I had one mechanic tell me it maybe a valve thats too tight. The engine only has 3k on it since rebuild in 93 and had adjustable lifters put back in it.
|
cliftford |
11-23-2016 @ 9:55 AM
|
|
|
Senior
Posts: 845
Joined: Jan 2014
|
I believe you have two problems that are not necessarily related. On the leaky spark plug look for roughness on the head sealing surface and clean as needed. As for the valve turn the crank until that cyl. is in firing position and put air [low pressure 10# or so] into the spark plug hole and it will blow air out the intake or out the exhaust if a valve is not closing. If it tries to turn the crankshaft, it is not a valve. Loosen radiator cap. If it blows air into the cooling system, it is probably a head gasket.
|
1934 Ford |
11-27-2016 @ 4:12 PM
|
|
|
Senior
Posts: 578
Joined: Oct 2009
|
It could also be that your head is not flat enough to prevent seapage past the head gasket. The problem is you said "No compression on #3" None or just a lot lower? Makes a BIG difference.
1934 Ford's since 1972
|
runningon8 |
11-28-2016 @ 4:19 AM
|
|
|
Member
Posts: 44
Joined: Oct 2016
|
No compression at all on 3.
|
1934 Ford |
11-28-2016 @ 8:31 AM
|
|
|
Senior
Posts: 578
Joined: Oct 2009
|
That sounds like a valve not closing. Most gasket leaks still have enough compression to force the air and gas out someplace else. Sounds like it's time to pull the head and see what's wrong in #3.
1934 Ford's since 1972
|
cliftford |
11-28-2016 @ 10:00 AM
|
|
|
Senior
Posts: 845
Joined: Jan 2014
|
I agree with 1934 ford. A valve not closing is most likely the problem.
|
runningon8 |
11-28-2016 @ 3:51 PM
|
|
|
Member
Posts: 44
Joined: Oct 2016
|
The engine was rebuilt in 93 and has only 3k on it since then. I'm getting more info pointing to a valve issue. I can see them open and close through the spark plug hole but obviously one isn't closing completely. The mechanic who rebuilt it put adjustable lifters back in it. I know this sounds stupid but to fix this problem in these flatheads do you have to get to them by pulling head or can they be adjusted by pulling the intake to get to the valve train?
|
cliftford |
11-28-2016 @ 9:45 PM
|
|
|
Senior
Posts: 845
Joined: Jan 2014
|
If it's just a matter of valve adjustment, you only need to pull the manifold. If it's not closing for any other reason you will need to pull the head too. Have you thought about a possible broken valve spring?
|