Honda CD70 Engine Head Leakage Problem

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hassantahir2 (Hassan Tahir) 2016-04-16 18:19:21 +0500 #19

I also said brether pipe is fine in my previous posts. Though i have changed it.

Hassan1991 (Electrical Engineer ) 2016-04-16 18:26:03 +0500 #20

may @saboor73 brother can help you

hassantahir2 (Hassan Tahir) 2016-04-16 18:26:04 +0500 #21

Actually the top end has been rebuilt 4 times till now. The bike is producing problems from the time when sleeve was added in the cylinder. And when i shifted to the stock piston that only lasted me a few thousand km 20-21k i guess.. And then top end was rebuild completely again with new timing chain, valves, etc. And a 0.5 piston. It has covered some 2000 km till now and i have changed the seals thrice in this period thats why i have a doubt on cylinder.

saboor73 (Saaboor A saad) 2016-04-16 18:32:55 +0500 #22

If seleve was added then scrape the chamber I would say as the changing seleve is 99.99% done wrong in pak its added with dry icing which is very expensive you could expect 5-6k for that and buying a new one is more economical than that

Hassan1991 (Electrical Engineer ) 2016-04-16 18:34:12 +0500 #23

cylinder.....i don't think so
if there's a problem in breather pipe or engine is heating up then seals leak

hassantahir2 (Hassan Tahir) 2016-04-16 18:35:52 +0500 #24

I think getting a new cylinder from AHL would be worth its price then.. I will surely do this when this time enginen is opened and will post the result here. Thank'u very much to all for your cooperation.

Hassan1991 (Electrical Engineer ) 2016-04-16 19:02:29 +0500 #25

don't understand brother.....your saying that "kharadiyas" don't add seleve "to install smaller size piston" in a right way?

saboor73 (Saaboor A saad) 2016-04-16 19:03:51 +0500 #26

Yes...

Hassan1991 (Electrical Engineer ) 2016-04-16 19:06:50 +0500 #27

thanks for info brother

hassantahir2 (Hassan Tahir) 2016-04-17 08:25:46 +0500 #28

Did the work today. Bought a new cylinder, piston and complete gasket set.
Mechanic said me to complete 500km running and report for any leakages again.
I have just covered some 40 km after the work bike is more performing like a new one.
Will post about the issue after running it for some more km. Hope that now i will not face any problem regarding oil seepage.

makniazi (Mechanical Engineer ) 2016-04-17 08:41:54 +0500 #29

do you still have the issue i can email you the service manual

saboor73 (Saaboor A saad) 2016-04-17 08:46:23 +0500 #30

Please mail me at a.sabooralisaad61@gmail.com

Hassan1991 (Electrical Engineer ) 2016-04-17 09:42:38 +0500 #31

Can you post the link here?

hassantahir2 (Hassan Tahir) 2016-04-17 10:01:01 +0500 #32

Plz send me the service manual. At.

muhammad.bilal376@gmail.com

makniazi (Mechanical Engineer ) 2016-04-24 06:53:17 +0500 #33

https://www.dropbox.com/sh/95eji3omi9cfayu/AACdoxEwjKt7wPmqrpY03whla?dl=0

hassantahir2 (Hassan Tahir) 2016-04-27 12:35:41 +0500 #34

I have covered 500+ kms after the head work and so far no leakage issues found..

Thanks to all the guy's for help...

Sent from my D2502 using PW Forums mobile app

ikhlaqahad (ikhlaqahad) 2016-07-28 11:06:52 +0500 #35

Please tell me where is the breather located
In the bike under the battery cabinet or under the carb?

khan-reed (khan-reed) 2016-11-30 00:40:12 +0500 #36

how to identify that engine was seal or open many times tell me

Hassan1991 (Electrical Engineer ) 2016-11-30 10:12:25 +0500 #37

Only bolts and seals shows that engine was opened or not . Carefully observe the bolts and every part that was joint with bolts having seals.

hidalgo (hidalgo) 2016-11-30 11:04:42 +0500 #38

get a new cylinder on zero with ahl piston for around 1.2 or 1.5k m not sure now , and seepage means you need to tight 4 bolts on head , which are kept a bit loose or get loose as piston settles