c21vhpd Posted August 29, 2003 Share Posted August 29, 2003 I have to take the head off my VHPD (cam tensioner pulley broke, belt came off, no compression on any cylinder ☹️). Having only just put new coolant in, I was wondering if I could just get away with draining off some of it. How much, or should I just drain the whole lot. BTW, being a 21, it's hard to save the coolant, as the rad is horizontal, and you have to take the bonnet off to get good access to the drain plug. The only truely successful technique I've employed in the past is to aqua-vac the whole lot out Honda Passion Orange, 640kg , and proud of it Link to comment Share on other sites More sharing options...
F355GTS Posted August 29, 2003 Share Posted August 29, 2003 Doubt you'll retain much maybe 1/4 to 1/3 of the 5 odd litres Don't want to be seen to be Ambulance chasing but I have a VHPD Head that might help Mark Link to comment Share on other sites More sharing options...
c21vhpd Posted August 29, 2003 Author Share Posted August 29, 2003 Do you mean that the head only retains that much, or that I might as well just resign myself to loosing all but 1/3 litre. As for the head - well, hopefully I've only got some bent valves to replace, but if it's worse than that, I'll stop the ambulance and we'll have a chat :) Honda Passion Orange, 640kg , and proud of it Link to comment Share on other sites More sharing options...
Gridgway Posted August 29, 2003 Share Posted August 29, 2003 Depending on what you were doing when the belt came off, you are very likely to have more extensive probs than taking the head off will solve. I would drain the whole lot and not worry about it. ☹️ Graham Link to comment Share on other sites More sharing options...
c21vhpd Posted August 29, 2003 Author Share Posted August 29, 2003 *sigh* Tomorrow's day in the garage is going to be fun isn't it... Honda Passion Orange, 640kg , and proud of it Link to comment Share on other sites More sharing options...
Gridgway Posted August 30, 2003 Share Posted August 30, 2003 did you get to the point of finding out the damage? Graham Link to comment Share on other sites More sharing options...
mav Posted August 30, 2003 Share Posted August 30, 2003 It has many bent or damaged vales and springs Link to comment Share on other sites More sharing options...
Bare Posted August 31, 2003 Share Posted August 31, 2003 Head comes off?... time for Rings and Bearings :-) Don't believe it? well in a few K miles you WILL be doing those, whether you want to or not. Lots easier to do it all 'right' the first time.. But as always the Choice is Yours :-). Link to comment Share on other sites More sharing options...
mav Posted August 31, 2003 Share Posted August 31, 2003 Easy there Bare. C21 haqs had that engine to bits probably more tines than you have had hot dinners recently Link to comment Share on other sites More sharing options...
c21vhpd Posted August 31, 2003 Author Share Posted August 31, 2003 do it all 'right' the first time No need - did a full bottom end rebuild 5000 miles ago, and then again when I had the block converted to an Evo2 by Scholar. The pistons look OK - Very lightly marked, but it looks like the impact energy all went into the valves. Numerous valves are bent, showing an amusing (I'm laughing about it now, but wasn't at the time) amount of daylight when they're supposed to be shut, and number 4 exhaust valves aren't moving at all, so I guess the springs are broken. Oilyhands has kindly agreed to supervise me rebuilding the head at his place, and V7SLR is offering lots of shimming advice as well. In such capable hands, what can go wrong Honda Passion Orange, 640kg , and proud of it Edited by - c21vhpd on 31 Aug 2003 15:27:55 Link to comment Share on other sites More sharing options...
Alex Birtwisle Posted August 31, 2003 Share Posted August 31, 2003 what can go wrong ahem.... are you sure you wanted to ask that 🤔 S713UMY 1.8K Viper Blue and Black Link to comment Share on other sites More sharing options...
Recommended Posts
Create an account or sign in to comment
You need to be a member in order to leave a comment
Create an account
Sign up for a new account in our community. It's easy!
Register a new accountSign in
Already have an account? Sign in here.
Sign In Now