 |
 | Home | Contact Us | FAQ | Search & Site Map | Link to Us |
 | Sign In | Join | Other 45 Sites in Network |
Car Forum / Driving, Maintenance, Tuning / Maintenance and Repair / June 2007Are these blemishes on the block between the cylinders something to be concerned about?
You may have seen my recent post regarding a head gasket issue on an '89 Cressida. The gasket wasn't outright broken but the machine said it showed signs of cross port intrusion. After cleaning the old gasket residue off this block preparing to put the surfaced head on I noticed some marks about the width of a pencil line between a few of the cylinders. http://home.mpinet.net/~docsavage20/marks/A.jpg http://home.mpinet.net/~docsavage20/marks/B.jpg http://home.mpinet.net/~docsavage20/marks/C.jpg They're more than just discoloration, I can just feel them with my finger. Anything to be concerned about? Is this evidence of firing between cylincders or something else? > You may have seen my recent post regarding a head gasket issue on an > '89 Cressida. The gasket wasn't outright broken but the machine said [quoted text clipped - 12 lines] > finger. Anything to be concerned about? Is this evidence of firing > between cylincders or something else? If you are talking about the scratches in the block between the cylinders, the manual should have a spec for acceptable variations in surface smoothness. The marks almost look like the result of scraping gaskets  SignatureRay O (correct punctuation to reply) > You may have seen my recent post regarding a head gasket issue on an > '89 Cressida. The gasket wasn't outright broken but the machine said [quoted text clipped - 10 lines] > finger. Anything to be concerned about? Is this evidence of firing > between cylincders or something else? Some over-enthusiastic gasket "scraping" using a hammer and chisel? > You may have seen my recent post regarding a head gasket issue on an > '89 Cressida. The gasket wasn't outright broken but the machine said [quoted text clipped - 12 lines] > finger. Anything to be concerned about? Is this evidence of firing > between cylincders or something else? Either we are looking at the surface of Mars, or like Ray and Master said, someone did a really inconsiderate job of gasket scraping. I would not be too concerned with them. Head gaskets do the majority of sealing just around the outside of the bore. There is usually a metallic sealing ring made in that area. Ouch! That is really too bad. It sure looks like the head was dropped on it's edge on top of the engine block. Those are nasty, nasty dents. I do not believe you can seal that with a head gasket alone. The block needs a resurface shave.... There 'might' be some kind of gasket maker that will hold compression with a new head gasket, but I am not up on the newer chemical concoctions. Mike 86/00 CJ7 Laredo, 33x9.5 BFG Muds, 'glass nose to tail in '00 88 Cherokee 235 BFG AT's - Gone to the rust pile... Canadian Off Road Trips Photos: Non members can still view! Jan/06 http://www.imagestation.com/album/pictures.html?id=2115147590 (More Off Road album links at bottom of the view page) > You may have seen my recent post regarding a head gasket issue on an > '89 Cressida. The gasket wasn't outright broken but the machine said [quoted text clipped - 12 lines] > finger. Anything to be concerned about? Is this evidence of firing > between cylincders or something else? > The block needs a resurface shave.... Yeah, that's the conclusion I've come to. I figure if it's deep enough for me to feel with my finger and fingernail, it's deep enough to cause a breach in the seal. By machining standards, that's like a river bed. > You may have seen my recent post regarding a head gasket issue on an > '89 Cressida. The gasket wasn't outright broken but the machine said [quoted text clipped - 12 lines] > finger. Anything to be concerned about? Is this evidence of firing > between cylincders or something else? Your not even close to done cleaning the top of that block yet. > Your not even close to done cleaning the top of that block yet.- Hide quoted text - Believe me, it's clean. Several careful passes with a honed putty knife between soakings in gasket remover, then several careful passes with a razor blade. What you're seeing is the condition of the metal. Those abrasions are deep enough to feel with my fingernail or my fingertip. Doc <docsavage20@yahoo.com> wrote in news:1181076053.607079.277510 @p47g2000hsd.googlegroups.com: > You may have seen my recent post regarding a head gasket issue on an > '89 Cressida. The gasket wasn't outright broken but the machine said [quoted text clipped - 12 lines] > finger. Anything to be concerned about? Is this evidence of firing > between cylincders or something else? looked at your jpg's...good resolution!......as far as the deck condition: not bad at all really. now when you finally finish it for fitting the head im sure it will seal fine...what im seeing in the pictures is a half done deck job. after removing debris it needs a good rotating disk (100 grit) to get it up to standrds....or pull it and send it to the machine shop. they need the money too! SignatureThe Source For Premium Newsgroup Access Great Speed, Great Retention 1 GB/Day for only $8.95 |
Reply to this Message |
 Sign In
 Join
 My Latest Posts My Monitored Threads My Blog My Photo Gallery My Profile My Homepage Start New Thread Enable EMail Alerts Rate this Thread
|
©2008 Advenet LLC Privacy Policy - Terms of Use
This website includes both content owned or controlled by Advenet as well as content owned or controlled by third parties.