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ok I think with over half my season spent in the shop ima chalk it up to a fluke and put the next few hundred miles on slow and easy and keep my fingers crossed and if ut happens again go from there. thanks for all the help..

ok update.....after taking it apart we again found that the second time it started running rought it was only a vacuum line that had came off the throttle body not another keeper falling out, so we pulled valve cover back off and Springs retainers and keepers all look good so now I'm trying to...

if in fact it is dropping a valve at a lower rpm what could that possibly be broken valve spring bad keeper are these motors known for weak springs

it was two different valves same cylinder exhaust side.

I cant believe that its coincidence that two springs broke or somthing unrelated to the head gasket job just happened to happen at the same time. its it possible that as a result of somthing he did I was able to over rev the motor and float a valve.....I was working it over quite good to make...

i now most of the history of the sled no major engine work, valves were not removed for gasket job and head was not machined and at inspection everything looked good as far as a broke spring he never removed them so I guess thats were we should start.....

both times the timing was set and checked rotated manually so the timing chain tensioner could preload then the engine was rotated again timing was checked it was put back together and ran for a few minutes so the carbs could be vac synced and it purred like a kitten. then we test rode it...

This is my probmlem in a nut shell me and my mechanic are lost... I bought my 08 nytro two months ago and as far as I know I blew the head gasket on my first ride because the fan relay was broke and it overheated. I diagnosed it as a head gasket and brought it in 1200$ and three weeks later I go...

I pulled the plate out last night and took the sled for a ride about 2 hours long temperature was 10 degrees and the slide ran great average temp was 180 to 190, it topped out at 200 degrees but was responsive when getting into deeper snow temp drop right back down I was happy. Until this...

whats the normal operating temp I should be looking for?

whats the normal operating temp I should be looking for?

sweet not a bad price eather werevdoes this cooler mount?

ok yea I have no use for studs and if it will help cool better ill also remove them. how thick are these coolers? does anyone have a link to were I can buy the mountain cooler. also im going to run the mountain thermostat to help keep cool.

are the 1" square tubes factory? or should the come out to?

you think 220 is overheated enought to cause damage.

ok well say I just want to replace the exchanger, how do you do it?

http://s603.photobucket.com/user/turbo_ ... sort=3&o=0 I think this has to be it... like I said I had to ride it a wile till it got hot and even then the red light never cam on just low oil pressure warning diagnostic code light. Whats the procedure for removing the cooler

i keep trying to but it wont load is there another way to post a pic

I just found somthing? after getting even more frustrated because the block check test came out negative I got a call from the previous owner telling me he had his mechanic install a gaurd sheild over the front and only cooler because his last track was studed and was ripping holes in the cooler...

ill keep you posted, and I appreciate all the help. as of right now im contemplating saving about 500$ by pulling the motor myself and bringing it in to have the gasket replaced. ive worked on my own cars for my whole life everything from motor swaps to complete engine teardown and rebuilds...