Probably something simple. (1 Viewer)
- Thread starter WIP77FJ
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Did you ever confirm w/ cruiserparts how they arrived at their 150 number. Leakdown is not compression....was it wet/dry....hot/cold? You need specifics from them. Do you have your throttle all the way open when you are testing? Did you get a rebuilt head from them as well? Did you check valve clearances?
- Thread starter
- #123
Just got a full engine, my dad wants to wait till they see the videos we made until we start negotiating. If the contract holds we'll have to pay 300-400 in shipping. We sent them a CD but they said all their computers ejected it and wouldn't read it. So we just sent out a flash drive today with the videos on us doing the compression and whatnot. They never said anything specific about compression only that it was at 150.
On the vids we did the engine was warm, and they only ranged 120-110. We also have not messed with the valves either except when installing the headgasket. I.E we didn't change the valve lash.
brian
SILVER Star
wait? you put a head gasket in it? why?
- Thread starter
- #126
We got a complete gasket set that was recommended by them. So we installed it. This was when we first got the engine not recent or anything.
brian
SILVER Star
you're probably screwed if you tell them this.
- Thread starter
- #128
So that's a yes then?
brian
SILVER Star
that's their out. "well it was fine when we "tested" it." "then you opened it, we can't be held accountable for things out of our control".
of course they will have no record of the testing other than their "good word", which in my book is worth less than nothing.
of course they will have no record of the testing other than their "good word", which in my book is worth less than nothing.
no i think brian meant that you voided any warranty with them most likely. i would check valves while the engine is totally warmed up and RUNNING. makes all the difference in the world for the exhaust valves. check in like pairs, then stop and adjust...remind us if your numbers are dry or wet?
I don't see why you are actually mailing them flash drives and CDs! Create a youtube account, upload the video and email them the link. Easy as that. You're making that part way too complicated.
- Thread starter
- #132
I don't know why either, my dad wants it done this way, and I'm not gonna try to "persuade" him anymore.
So, with some documentation, you should have a good case- if this thing came to you with those numbers--they're sadly lacking.
- Thread starter
- #136
Thing is we didn't compression test till we got it all buttoned up.
i would at least check and adjust valves if necessary and then put a vac gauge on it and see if its where it should be, nice and steady, i think about 17 or 18 inches. maybe buy a new compression gauge to cover the bases.
I'll just add a .02 or so here ...
One , never trust a used engine - always compression test it when it arrives . Both wet/dry and throttle wide open will give you an idea on condition . If it's low pressure , contact the seller immediately .
Two , since it's already too late -
You changed out the head gasket without adjusting the valves . Your pressure readings are consistent enough to at least include the possibility of the head gasket thickness difference being the problem . That difference without adjusting the valves is probably where you are losing pressure . Get those valves set , asap .
ANY time I remove a cylinder head from an unknown engine I always bounce the valves with a soft face hammer and test the valve seating seal area with brake cleaner - it's easy and works . You don't have to smash rocks here , just bounce the valves one or twice to clear any debris and seat the valve to the head . Spray brake cleaner into the port/valve you want to check with the port facing up and the valve/head surface facing horizontally . If that valve leaks at all you'll see it instantly .
Anyway , get the valves set and adjusted , then re-test compression . Bet it's higher ....or the valves are leaking badly .
Sarge
One , never trust a used engine - always compression test it when it arrives . Both wet/dry and throttle wide open will give you an idea on condition . If it's low pressure , contact the seller immediately .
Two , since it's already too late -
You changed out the head gasket without adjusting the valves . Your pressure readings are consistent enough to at least include the possibility of the head gasket thickness difference being the problem . That difference without adjusting the valves is probably where you are losing pressure . Get those valves set , asap .
ANY time I remove a cylinder head from an unknown engine I always bounce the valves with a soft face hammer and test the valve seating seal area with brake cleaner - it's easy and works . You don't have to smash rocks here , just bounce the valves one or twice to clear any debris and seat the valve to the head . Spray brake cleaner into the port/valve you want to check with the port facing up and the valve/head surface facing horizontally . If that valve leaks at all you'll see it instantly .
Anyway , get the valves set and adjusted , then re-test compression . Bet it's higher ....or the valves are leaking badly .
Sarge
- Thread starter
- #140
Update: Adjusted valves and noda towards compression improvement. Did leak down heard bubbles in crankcase, and air from intake and exhaust.Cruiserparts called late today after they saw the videos and such and said they'd handle everything. New engine and gasket kit is supposed to arrive next week
